Answer:
Let's start by using the formula for finding the percentage: percentage = (part/whole) x 100 In this case, we know the percentage (2%) and the part (88 problems), but we don't know the whole (total number of problems on the test). So we can write: 2% = (88/whole) x 100 Simplifying, we get: 0.02 = 88/whole Multiplying both sides by the whole, we get: whole x 0.02 = 88 Dividing both sides by 0.02, we get: whole = 4400 Therefore, there were 4400 problems on the English test.
Answer:90 problems
Step-by-step explanation:
To solve the problem, we can use the formula:% correct = (number of correct answers / total number of questions) * 100%Since the student received a grade of 2%, we can write:2% = (number of correct answers / total number of questions) * 100%Simplifying this equation, we get:total number of questions = number of correct answers / 0.02We know that the student missed 88 problems, so the number of correct answers is:number of correct answers = total number of questions - 88Substituting this into the equation above, we get:total number of questions = (total number of questions - 88) / 0.02Simplifying this equation, we get:total number of questions = 50 * (total number of questions - 88)Solving for the total number of questions, we get:total number of questions = 90Therefore, there were 90 problems on the English test
2. (a) Arnold walked a distance of 50km due north. He continued to move 25km due east.
Sketch a diagram to illustrate the Arnold's movement from the starting point.
Find correct to the nearest whole number the distance between where he started the
journey and where he ended the journey
The bearing of his starting point from his end point.
Answer:
Step-by-step explanation:
The sketch is a right-angled triangle.
We can use Pythagoras' theorem.
[tex]z^{2} =x^{2} +y^{2}[/tex]
z=√(50^2+25^2)
z= 25√5
z=25*2.23
z=55.75
z≈56km
the distance between where he started the
journey=56km
tan(90-Θ)=25/50
cotΘ=1/2
tanΘ=2
Θ=[tex]tan^{-1} (2)[/tex]
bearing of his starting point from his end point[tex]tan^{-1} (2)[/tex]
Assume the random variable x is normally distributed with mean u=89 and standard deviation o=4. Find the indicated probability. P(x<87)
The random variable x is normally distributed with mean u=89 and standard deviation o=4. The indicated probability, P(x<87)= 0.3085.
Describe Standard Deviation?In statistics, standard deviation is a measure of the amount of variation or dispersion in a set of data. It is a commonly used measure of the spread of a distribution and is calculated as the square root of the variance.
A higher standard deviation indicates that the data points are more spread out from the mean, while a lower standard deviation indicates that the data points are more tightly clustered around the mean.
Standard deviation is an important concept in statistics and is used in many statistical analyses, such as hypothesis testing and confidence interval estimation. It is also used in finance and economics to measure the risk associated with investments and to assess the variability of economic data.
To solve this problem, we need to standardize the value using z-score formula.
z = (x - mu) / sigma
Here, x = 87, mu = 89, and sigma = 4.
z = (87 - 89) / 4 = -0.5
We can look up the corresponding area under the standard normal distribution curve using a table or calculator. The area to the left of z = -0.5 is 0.3085.
Therefore, P(x < 87) = P(z < -0.5) = 0.3085.
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What the heck is 5u(2) it’s supposed to be multiplication
Answer:
10u
Step-by-step explanation:
Solve for ∠A
. Round your answer to the nearest tenth.
∠A
= degrees
(60 points)
Answer:
∠A = 48.2
Step-by-step explanation:
Cos^-1(6/9
Use the Cosine with the negative one because you are finding an angle. Then, because Cosine is adjacent/hypotenuse, 6 would be your adjacent side length to theta and 9 would be the hypotenuse as it is across from the right angle.
In ΔMNO, m ∠ � = ( 4 � − 13 ) ∘ m∠M=(4x−13) ∘ , m ∠ � = ( 2 � − 13 ) ∘ m∠N=(2x−13) ∘ , and m ∠ � = ( 5 � + 19 ) ∘ m∠O=(5x+19) ∘ . Find m ∠ � . m∠N.
The value of m∠N is 21° ,the value of m∠M is 55° and the value m∠O is 106°.
To find the value of x, we can use the fact that the sum of the angles in a triangle is 180 degrees. Therefore:
m∠M + m∠N + m∠O = 180
Substituting the given angle measures, we get:
(4x-13) + (2x-13) + (5x+19) = 180
Simplifying the equation, we get:
11x - 7 = 180
11x = 187
x = 17
Now that we know the value of x, we can find the measure of each angle. Substituting x = 17, we get:
m∠M = (4x-13) = (417-13) = 59 degrees
m∠N = (2x-13) = (217-13) = 21 degrees
m∠O = (5x+19) = (5*17+19) = 106 degrees
Therefore, the measure of ∠MNO is:
m∠N = 21 degrees
Note: The question also asks for the measure of ∠P, but there is no information given about ∠P in the problem.
In AMNO, m angle M = (4x - 13) deg m angle N = (2x - 13) deg and m angle O = (5x + 19) deg Find m/N.
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[tex]A= \left[\begin{array}{ccc}2&-1&3\\1&-3&-1\end{array}\right] B= \left[\begin{array}{ccc}-2&1&3\\-1&-2&-2\end{array}\right] find 3A-2B[/tex]
According the given question 3A - 2B matrix is equal to:
[tex]\left[\begin{array}{ccc}10 & -5 & 3 &5 & -5 & 1\end{array}\right][/tex]
What are Matrix ?A matrix is a rectangular array οf numerical values, symbοls, οr verbal expressiοns that are οrganised in rοws and cοlumns. In many disciplines, such as cοmputer science, engineering, physics, and mathematics, it is used tο represent data.
Calculating 3A and 2B first, then deducting 2B frοm 3A, is required tο find 3A - 2B.
Calculating 3A:
[tex]3A = 3 * \left[\begin{array}{ccc}2 & -1 & 3\1 & 1 & -3 & -1\end{array}\right]= \left[\begin{array}{ccc}6 & -3 & 9\3 & 3 & -9 & -3\end{array}\right][/tex]
Calculating 2B:
[tex]2B = 2 * \left[\begin{array}{ccc}-2 & 1 & 3 & -1 & -2 & -2 \end{array}\right]= \left[\begin{array}{ccc}-4 & 2 & 6 & -2 & -4 & -4\end{array}\right][/tex]
Nοw, we can find 3A - 2B by subtracting 2B frοm 3A:
[tex]3A - 2B = \left[\begin{array}{ccc}6 & -3 & 9 &3& -9 & -3\end{array}\right] - \left[\begin{array}{ccc}-4 & 2 & 6 &-2 & -4 & -4\end{array}\right]= \left[\begin{array}{ccc}10 & -5 & 3 &5 & -5 & 1\end{array}\right][/tex]
Therefore, 3A - 2B is equal to:
[tex]\left[\begin{array}{ccc}10 & -5 & 3 &5 & -5 & 1\end{array}\right][/tex]
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Determine if (0,3)
is a solution to y>2
. If so, graph the inequality.
An image of a coordinate plane shows a dashed line with a positive slope. The line crosses the y-axis at (0, 2) and passes through the point (negative 2, negative 2). The area above and to the left of the line is shaded.
An image of a coordinate plane shows a dashed vertical line. The line crosses the x-axis at (2, 0) and passes through the points (2, negative 2) and (2, 2). The area to the right of the line is shaded.
is not a solution.
An image of a coordinate plane shows a dashed horizontal line. The line crosses the y-axis at (0, 2) and passes through the points (2, 2) and (negative 2, 2). The area above the line is shaded.
Answer:
To determine if (0,3) is a solution to y>2, we need to check if y is greater than 2 when x=0 and y=3. Since 3 is greater than 2, the point (0,3) satisfies the inequality y>2.
To graph the inequality y>2, we need to shade the region above the horizontal line y=2. The line y=2 is a solid line since it includes the points where y=2, but the region above the line is shaded with a dashed line since it does not include the points where y=2.
Here is a description of the graph:
Draw a horizontal line passing through the point (0,2).
Shade the region above the line with a dashed line.
The graph visually represents all the points that satisfy the inequality y>2. Since the point (0,3) is above the line, it is part of the shaded region and satisfies the inequality.
On 36 acres of land , there are a total of 2808 trees. If the trees are sread out evenly , how many trees are on each acre of land ?
There are approximately 78 trees on each acre of land when the trees are spread out evenly.
To find the number of trees on each acre of land mathematically, we can use the formula for average or mean.
The average number of trees per acre can be found by dividing the total number of trees by the total number of acres. In this case, we have 2808 trees and 36 acres:
Average number of trees per acre = Total number of trees / Total number of acres
Average number of trees per acre = 2808 / 36
Average number of trees per acre = 78
Therefore, there are approximately 78 trees on each acre of land when the trees are spread out evenly.
This means that if the land is divided into 36 equal sections, each section will have approximately 78 trees.
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In a lab group, there are 3 students taller than 62 inches and 2 students shorter than
62 inches.
The teacher selects 2 students at random.
What is the probability that both students are shorter than 62 inches?
Hence, there is a 1/10 or 0.1 chance that both of the chosen kids will be under 62 inches tall.
what is probability ?In the field of mathematics known as probability, random chance and their results are examined. It entails putting a number between zero and 1, where 1 indicates that now the event is guaranteed to happen and 0 that it is impossible, to reflect the possibility of an event occurring. From straightforward games of chance to intricate real-world systems like share prices and weather patterns, probability theory offers a framework for the analysis and modelling of a wide range of phenomena. It has uses in physics, economics, computer science, statistics, and other disciplines.
given
Let A represent the scenario in which the first student chosen is under 62 inches, and B represent the scenario in which the second student chosen is under 62 inches as well.
Since there are two shorter kids out of a total of five students, the likelihood of choosing one on the first try is 2/5.
Given that the first student was shorter, the likelihood of choosing another shorter student on the second try is 1/4 because there would only be 1 shorter student left out of the other 4 students.
Thus, the likelihood of picking two consecutive students who are shorter
The formula for P(A and B) is P(A) P(B|A) = (2/5) (1/4) = 1/10.
Hence, there is a 1/10 or 0.1 chance that both of the chosen kids will be under 62 inches tall.
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What is the probability of getting a even number from the bag
Answer: The actual answer is 7/12, but the closest match is (A) 1/2.
what is 95.2% confidence interval in z-score
A 95.2% confidence interval in z-score is a range of values that is likely to contain the true population mean with a probability of 95.2%. The z-score for a 95.2% confidence interval is approximately ±1.97.
To calculate the 95.2% confidence interval in z-score, we can use the following formula:
CI = X ± z × (σ/√n)
where X is the sample mean, σ is the population standard deviation, n is the sample size, and z is the critical value from the standard normal distribution table.
For a 95.2% confidence interval, the area in the tails of the standard normal distribution is 0.024 (0.5 - 0.952/2). Therefore, the critical z-value for a 95.2% confidence interval is approximately ±1.97.
This formula assumes that the sample follows a normal distribution, or that the sample size is large enough to satisfy the central limit theorem.
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The sum of 1/2 and 2/3 is ______1. a. equal to b. less than c. greater than
Answer:
c. greater than
Step-by-step explanation:
[tex]\frac{1}{2}[/tex] + [tex]\frac{2}{3}[/tex] = [tex]\frac{3}{6}[/tex] + [tex]\frac{4}{6}[/tex] = [tex]\frac{7}{6}[/tex] ≈ 1.167
1.167 > 1
So, the answer is c. greater than
- A circle is divided into 5 equal parts.
What is the measure of the angle that
turns through 2 parts?
The measure of the angle in the given circle which pass through 2 parts out of 5 is 144°.
What is a circle?All points in a plane that are at a specific distance from a specific point, the center, form a circle.
In other words, it is the curve that a moving point in a plane draws to keep its distance from a specific point constant.
The radius of a circle is the separation between any point on the circle and its center.
The radius must typically be a positive integer. A circle, specifically, is a straightforward closed curve that separates the plane into its inner and exterior.
In common usage, the word "circular" can be used to describe both the figure's edge and its entirety, including its interior.
So, we know that:
The angle of the center of the circle is 360°.
We also know that in the given situation, the circle is divided into 5 parts.
Then,
= 360/5
= 72
Now,
The measure of 2 parts:
72 + 72 = 144
Therefore, the measure of the angle in the given circle which pass through 2 parts out of 5 is 144°.
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The volume of a rectangular prism is 6,142.5 cm3. If the height is 16.25 cm and the length is 28 cm, what is the value of the width?
13.125 cm
13.25 cm
13.5 cm
13.75 cm
Answer:
A. 13.125cm
Step-by-step explanation:
To solve for the width of the rectangular prism, we can use the formula for the volume of a rectangular prism, which is:
volume = length x width x height
We are given that the volume is 6,142.5 cm^3, the height is 16.25 cm, and the length is 28 cm. Let's substitute these values into the formula and solve for the width:
6,142.5 cm^3 = 28 cm x width x 16.25 cm
Dividing both sides by (28 cm x 16.25 cm), we get:
width = 6,142.5 cm^3 / (28 cm x 16.25 cm)
= 13.125 cm
Therefore, the width of the rectangular prism is 13.125 cm. So, the correct answer is A) 13.125 cm.
Calculate the area of the shapes below
the area of the shape shown in the diagram is 91 m².
What is area?Area is the space bounded by a plane shape.
To calculate the area of the shape, we use the formula below
Note: Area of the shape = Area of the rectangle+ Area of the triangle
Formula:
A = LW+Lh/2.......................... EquationWhere:
A = Area of the shapeL = Length of the rectangle = Base of the triangleh = Height of the triangleW = Width of the rectangleFrom the question,
Given:
L = 13 mW = 9-4 = 5 mh = 4 mSubstitute these values into equation 1
A = (13×5)+(13×4/2)A = 65+26A = 91 m²Hence, the area is 91 m².
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A rectangle has side lengths (4x-5) and (3x+6). Write a linear expression in simplest form to represent the perimeter. Find perimeter if the value of x=12
Answer:
P = 14x + 2
if x=12, P = 170
Step-by-step explanation:
The perimeter is the distance around the outside of the shape.
The rectangle has four sides. Two long sides and two short sides.
We add up all four sides.
P = 4x-5+3x+6+4x-5+3x+6
combine like terms.
P = 14x + 2 this is the equation in simplest form.
If x = 12, we can calculate the perimeter.
P = 14(12) + 2
P = 168 + 2
P = 170
The perimeter would be 170.
I need help with this please
Answer: 384 cm cubed
Step-by-step explanation: The first thing you will do is 48 square centimeters times 8 cm. Since 48 is squared you have that 2 right above it. Your 8 technically has a 1 above it. So add the 2 and the 1, and you will get cubed. (AKA 3)
(5, 5, 6, 9, 9, 11, 13}
This set has two_____
-medians
-means
-modes
Answer:
modes
Step-by-step explanation:
The only one of the three (median, mode, mean) that there can be more than one for a set is the mode, and in fact it has two modes: 5 and 9.
Answer: modes
Handy Dandy Grocery is having a sale this week. If you buy a 5−pound bag of apples for the regular price, you can get another bag for $1.49. If you buy a 5−pound bag of oranges for the regular price, you can get another bag for $2.49.
Handy Dandy Grocery
Regular price
5−pound bag of apples 2.89
5−pound bag of oranges 3.89
Part 1 out of 2
Enter an addition equation to find the discount for apples. Use a for apples.
An equation is
Enter an addition equation to find the discount for oranges. Use r for oranges.
An equation is
the equation to find the discount for oranges is: [tex]r = 3.89 + 2.49[/tex] [tex]r= 6.38[/tex]
What is the equation?
The discount for apples is $ [tex]2.89[/tex] + $ [tex]1.49[/tex], since you can get another bag for $1.49 when you buy a 5-pound bag of apples at the regular price.
So the equation to find the discount for apples is:
[tex]a = 2.89 + 1.49[/tex]
[tex]a = 4.38[/tex]
Similarly, the discount for oranges is $ [tex]3.89[/tex] + $ [tex]2.49[/tex], since you can get another bag for $2.49 when you buy a 5-pound bag of oranges at the regular price.
Therefore, the equation to find the discount for oranges is: [tex]r = 3.89 + 2.49[/tex]
[tex]r = 6.38[/tex]
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In 2002 you could buy a Broadway show ticket for $40. Use the CPI chart below to find the cost of Broadway show in 2014 based on inflation
The cost of a Broadway show ticket in 2014, based on inflation, would be approximately $52.59.
What is inflation?Inflatiοn, in general, is the prοcess thrοugh which mοney lοses value οver time. As a result, 100 dοllars suddenly have less purchasing pοwer than they had previοusly. This indicates that the awards will increase tο maintain a steady purchasing pοwer.
Tο find the cοst οf a Brοadway shοw ticket in 2014, we need tο adjust the price frοm 2002 using the Cοnsumer Price Index (CPI) fοr each year. The CPI measures the changes in the cοst οf gοοds and services οver time due tο inflatiοn.
Here is the CPI data for the relevant years:
2002 CPI: 179.9
2014 CPI: 236.7
To adjust the 2002 price of $40 to its equivalent in 2014 dollars, we can use the following formula:
Adjusted Price in 2014 Dollars = Price in 2002 Dollars x (CPI in 2014 / CPI in 2002)
Plugging in the numbers, we get:
Adjusted Price in 2014 Dollars = $40 x (236.7 / 179.9) = $52.59
Therefore, the cost of a Broadway show ticket in 2014, based on inflation, would be approximately $52.59.
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Complete question:
In 2002 you could buy a Broadway show ticket for $40. Use the CPI chart below to find the cost of Broadway show in 2014 based on inflation.
pls help i have no idea what it could be someone needss to help meeeeee.
Answer:
Step-by-step explanation:
Eric had a box of 24 candy bars that he planned to sell for 63 cents each. Unfortunately, his sister ate 7 of his candy bars before he started selling them. In order to bring in the same amount of money as he would have if his sister had not eaten any of the candy bars, what price (in cents) should he charge for each of the remaining candy bars?
The price (in cents) should he charge for each of the remaining candy bars 49
First, we would want to calculate how much the box would sell for before the sister ate some.
We would get 24*63(in cents) and we can further get 1512 cents before the sister ate the candy bars.
The sister ate 7 candy bars leaving us with 31 candy bars. To deduct the price for each candy bar, it would be a situation like the following:
$6 for 3 boxes of 500 cookies (i know that's cheap)
6/3...
$2 per box.
Using our situation we get 1512 cents for 31 candy bars.
1512÷31
=48.77
That does seem unrealistic, so we round to the nearest whole number and we get...
49 cents
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4(3x=2)-9 in written form
he expression 4(3x=2)-9 can be written as 12x - 9. I
One plumbing job requires 45 meters of PVC pipe, and a second job requires 30 meters. The pipe comes in 6-meter lengths only. How many sections should the plumber buy? How much pipe will be left over, assuming that there are no errors?
a) The plumber should buy 13 sections of 6-meter lengths of PVC pipes.
b) Assuming that there are no errors, the left-over pipe after satisfying Jobs A and B should be 3 meters.
How the quantities are determined:We can use mathematical operations of addition, division, multiplication, and subtraction to determine the two quantities above.
In the first place, the total quantity of PVC pipes required is 75 meters.
This sum is divided by 6 to obtain the sections required, which is approximated to the nearest whole number.
Finally, 75 meters are subtracted from the total quantity bought.
PVC pipes required by Job A = 45 meters
PVC pipes required by Job B = 30 meters
The total quantity of PVC pipes required = 75 meters
The length of each PVC pipe = 6 meters
The number of pipes to buy = 13 sections (75 ÷ 6)
13 sections of pipes = 78 (6 x 13)
Leftover PVC pipes = 3 meters (78 - 75)
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The center of the circle is shown.
9
What is the exact area of the circle?
324n
18n
9r
81n
Answer:
The area is (9^2)π = 81π.
Solve for b.
8b−1=24b+4
ANSWER: -7
i just took the test
Answer:
[tex]b = - 0.3125[/tex]
Step-by-step explanation:
[tex]8b - 1 = 24b + 4[/tex]
Collect like-terms (also, when moving a term to the other side, its sign changes to the opposite of the previous one):
[tex]8b - 24b = 4 + 1[/tex]
[tex] - 16b = 5[/tex]
Divide both sides of the equation by (-16) to make b the subject:
[tex]b = - 0.3125[/tex]
3.
The formula for converting Fahrenheit temperature to centigrade is °C
=% (°F - 32). What is the difference in centigrade degrees between a
temperature of 60°F and a temperature of 78°F?
25
A. 1°C
B. 5°C
C. 10°C
D. 18°C
The difference in centigrade degrees between a temperature of 60°F and a temperature of 78°F is 10°C.
Calculating the difference between the temperaturesTo convert Fahrenheit (°F) to Celsius (°C), you can use the following formula:
°C = (°F - 32) / 1.8
Using this formula, we can first convert 60°F to Celsius:
°C = (60°F - 32) / 1.8
°C = (28°F) / 1.8
°C = 15.56°C
Similarly, we can convert 78°F to Celsius:
°C = (78°F - 32) / 1.8
°C = (46°F) / 1.8
°C = 25.56°C
The difference in Celsius degrees between these two temperatures is:
Δ°C = 25.56°C - 15.56°C
Δ°C = 10°C
Therefore, the difference in centigrade degrees between a temperature of 60°F and a temperature of 78°F is 10°C.
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Bob runs an auto repair shop. Over 6 months, he finds that out of 700 cars that are brought in, 144 require more than one day to repair. Based on this information, what is the probability that the next car brought to his shop can be fixed in a day? Responses 20.6% 20.6% 55.6% 55.6% 79.4% 79.4% 82.9%
The answer to the given question about probability of Bob's shop is option 7) 79.4%.
Out of 700 cars, 144 require more than one day to repair. So the number of cars that can be fixed in one day is
700 - 144 = 556.
The probability that the next car brought to the shop can be fixed in a day is the ratio of the number of cars that can be fixed in a day to the total number of cars:
probability = 556/700
= 0.794 or 79.4%
Therefore, the correct answer is option 7) 79.4%.
Probability is a branch of mathematics that deals with the study of random events or phenomena. It is used to quantify the likelihood of an event occurring, and it is expressed as a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain. Probability theory is widely used in various fields, such as statistics, physics, economics, and finance, to make predictions and decisions based on uncertain or incomplete information. It provides a powerful tool for analyzing and understanding uncertainty, risk, and randomness in real-world situations, and it has numerous practical applications in diverse areas of research and industry
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Write the fifteenth term of the binomial expansion of (v−w^2)^22
Answer:
Step-by-step explanation:
[tex]T_{r+1}=nc_{r}x^{n-r}a^r\\x=v\\a=-w^2\\n=22\\r+1=15\\r=15-1=14\\22c_{14}=22c_{22-14}=22c_{8}\\ T_{15}=22c_{8}v^{22-14}(-w^2})^{14}\\T_{15}=22c_{8}v^8w^{28}[/tex]
Find the probability of exactly 4 successes in 7 trials of a binomial experiment in which the probability of success is 55%. P = [?]% Round to the nearest tenth of a percent. Enter
the probability of exactly 4 successes in 7 trials of a binomial experiment in which the probability of success is 55% is 0.29 = 29%
A binomial experiment is an experiment that has the following four properties:
The experiment consists of n repeated trials
Each trial has only two possible outcomes
The probability of success, denoted p, is the same for each trial
Each trial is independent
the probability of exactly 4 successes in 7 trials of a binomial experiment in which the probability of success is 55%
We know that the binomial distribution
[tex]^nc_rp^rq^{n-r[/tex]
Where n is the number of trails
p is the probability of success in each trial
q =1-p which is the probability of failure
Here r=4
n=7
p= 55 % =0.55
then by the formula
[tex]p(4)=^7c_4(o.55)^4(0.45)^3\\\\p(4)=35*0.091*0.091\\p(4)=0.29[/tex]
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