Answer:
x = 3.556 or [tex]\frac{32}{9}[/tex]
Step-by-step explanation:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation:
(3*x-5)^2-((x+x+25))=0
Evaluate:
[tex](3x-5)^{2}[/tex] = [tex]9x^{2} -30x+25[/tex]
Pull like factors:
9x^2 - 32x = x • (9x - 32)
x • (9x - 32) = 0
Remember roots of a product:
A product of several terms equals zero. When a product of two or more terms equals zero, then at least one of the terms must be zero. We shall now solve each term = 0 separately. In other words, we are going to solve as many equations as there are terms in the product. Any solution of term = 0 solves product = 0 as well.
Solve : 9x - 32 = 0
Add 32 to both sides of the equation :
9x = 32
Divide both sides of the equation by 9:
x = 32/9 = 3.556
Ms. Namgung's electric hedge trimmer has a 10-foot cord. Each of her extension cords is 50 feet long. The farthest hedge is 40 yards from the electrical outlet. How many extension cords will Ms. Namgung use to trim all the hedges? Explain.
Answer: She will need 3 extension cords.
Step-by-step explanation:
If the farthest hedge is 40 yards away, that means it is 120 feet away because 1 yard equals 3 feet. If the cord on her trimmer is 10 feet and her extension cords are 50 feet long, 10+50+50+50= 160 feet. This means she would need 3 extension cords. 2 extension cords would not be long enough.
Need help please?!?!?! Extra points!!!
Answer:
4.19
Step-by-step explanation:
just use the formula 2pir^2
Suppose there is a bag of 20 marbles. Of these marbles, 12 are green, 5 are blue, 2
are red, and 1 is black. What is the probability of drawing three marbles and having all
three be blue, without replacement?
Answer:
3/20 or (i think %15)
Step-by-step explanation
This is mostly a guess since I haven't done probability in a while. Good luck though.
Photo attached. Someone please help
Thanks
By using the graph, a solution the given system of equations include the following:
x = 0, y = 3
x = 3, y = 6
What are quadratic functions?In Mathematics, the graph of every quadratic functions (equations) is either an upward or downward parabola, which is typically a u-shaped curve. This ultimately implies that, the graph of a quadratic function (equation) would always form a parabolic curve.
In this scenario, we would use an online graphing calculator to plot the graph of the given system of equations and then determine the point of intersection.
y = x + 3
y = x² - 2x + 3
By critically observing the graph of the given system of equations, the solutions are as follows;
x = 0, y = 3.
x = 3, y = 6.
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Emelio is going to China on vacation. He can take one bag for free, but if the
weight of the bag is greater than 45 lb, he must pay a fee. Emelio knows his
bag weighed 32.4 lb on the way to China, and he plans to buy gifts for his
parents and siblings. He packs the same things he brought to China plus the
gifts into his bag on the way back. If he doesn't want to pay a fee, how much
can the gifts weigh?
The weight of the gifts must be Select...
Ib.
Answer:
12.6
Step-by-step explanation:
you basically subtract 32.4 and 45 to get your final answer because if a question has the words " how much more " you will most likely have to subtract or include subtraction
y 10- 9 8 6 5 4 2 1 2 3 4 5 6 7 8 9 10 What is the equation of the blue line? X
Therefore , the solution of this is the required system of equation is,
y=-x+6 and y=x+10.
Explain the equation.A mathematical equation is a formula that links two statements by indicating their equivalence with the equal sign (=). A mathematical statement that proves the equality of two mathematical expressions is known as an equation in algebra. For instance, the components 3x + 5 and 14 in the equation 3x + 5 = 14 are separated by an equal sign. The relationship between two sentences on either side of a letter is expressed mathematically. There is frequently only one variable, which doubles as the symbol. say that 2x - 4 Equals 2.
Here,
(0,6) and the blue line pass through them (-2,8). You may figure out the equation for the blue line as,
=> y-6/x-0 = 8-6 /-2-0
=>y-6/x = 2/-2
=> y-6=-1(x)
y=-x+6
(-2, 8) and the red line pass through them (-3,7). The red line's equation can be calculated as,
y-8/x- (-2) = 8-7 /-2-(-3)
y-8 /x+2 = 1
y-8=x+2
y = x + 10
Thus, the required system of equations is,
y=-x+6 and y=x+10.
Therefore , the solution of this is the required system of equations is,
y=-x+6 and y=x+10.
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At a bakery, 55 chocolate chip cookies were burned. if that was 15% of the day's production, how many total cookie did they make that day?
The total number of cookies that was made that day given that 55 which is 15% was burnt is 360.
How to solve for the number of cookies madeWe know that the number of burned cookies is 55, and that this represents 15% of the total production for the day.
We can use this information to set up a proportion to find the total number of cookies made that day.
Burned cookies / Total cookies = 15% / 100%
55 / X = 15/100
To find the total number of cookies made, we can cross-multiply and divide:
X = (55 * 100) / 15
X = 365
So, the bakery made a total of 365 cookies that day.
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explain step by step please thank you!
Paco drives an average of 55 miles per hour. Their destination is 274 miles away. wants to arrive at 4:00 p.m. and allow an extra hour for stops. What time should he go out?
Toni runs around her school's baseball diamond. Each side is 27 m long. Note: A baseball diamond is square. How far does Toni run? m
Answer:
If we assume she runs around it once and since they tell us its a square: 27x4=108
Step-by-step explanation:
What's the equation and solution?
Observing the given figure , It is a balanced balance which signifies both side should be equal, The answer is 2=-8-x and x=-10.
What do you mean by equations?An algebraic expression in mathematics is an expression created using variables, constant algebraic numbers, and algebraic operations. A collection of one or more linear equations containing the same variables is known as a system of linear equations in mathematics. A set of two or more linear equations with two or more variables each constitutes a system of linear equations, all of which are taken into account simultaneously. Finding a numerical value for each variable in the system that will simultaneously satisfy all of the system's equations is necessary to identify the one and only solution to a system of linear equations.
What are the methods to solve system of equations?There are three ways to solve systems of linear equations :
GraphingSubstitution methodElimination method2=-8-x is the required balanced equation.
-x = 2 + 8
x= -10
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Toll Brothers is a luxury home builder that would like to test the hypothesis that the average size of new homes exceeds 2,400 square feet. A random sample of 36 newly constructed homes had an average of 2,510 square feet with a sample standard deviation of 480 square feet. Conduct a test of hypothesis at a 1% level of significance to see if indeed the average size of new homes exceeds 2,400 square feet.
Answer:
Since the pvalue of the test is 0.09 > 0.01, we do not reject the null hypothesis that the average size of new homes is of 2400 square feet.
Step-by-step explanation:
Toll Brothers is a luxury home builder that would like to test the hypothesis that the average size of new homes exceeds 2,400 square feet. Test to see if the average size of new homes exceeds 2,400 square feet.
At the null hypothesis, we test if the average is of 2400 square feet, that is:
[tex]H_o: \mu = 2400[/tex]
At the alternate hypothesis, we test if the average is greater than 2400 square feet, that is:
[tex]H_a: \mu > 2400[/tex]
The test statistic is:
Since we have the standard deviation for the sample, we use the t-distribution.
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, s is the standard deviation of the sample and n is the size of the sample.
2400 is tested at the null hypothesis:
This means that [tex]\mu = 2400[/tex]
A random sample of 36 newly constructed homes had an average of 2,510 square feet with a sample standard deviation of 480 square feet.
This means that [tex]n = 36, X = 2510, s = 480[/tex]
Test statistic:
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
[tex]t = \frac{2510 - 2400}{\frac{480}{\sqrt{36}}}[/tex]
[tex]t = 1.375[/tex]
Pvalue of the test and decision:
The pvalue of the test is the probability of finding a sample mean of at least 2510, which is the pvalue of t = 1.375 with 36 - 1 = 35 degrees of freedom, using a one-tailed test.
With the help of a calculator, this pvalue is of 0.09
Since the pvalue of the test is 0.09 > 0.01, we do not reject the null hypothesis that the average size of new homes is of 2400 square feet.
A jar containing only nickels and dimes contains a total of 60 coins, The value of all the coins in the jar is $4.45. Write a system of equations to find the number of nickels and dimes in the jar. Use x for the number of nickels and y for the number of dimes.
Pls help me!
1/3 of it is 9?
Answer:
27
Step-by-step explanation:
(1/3) * x = 9
x = 9 * (3/1)
x = 27
Hope this helps!
Answer:
let the number be x
1/3*x=9
x/3=9
x=9*3
x=27
Step-by-step explanation:
therefore the number is 27
George has two dogs.
One weighs 56.5 pounds
and the other weighs 47.75
pounds.
What is the total weight, in pounds, of the two dogs?
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the answer to this equation is 104.25
Find the value of X from the right triangle please can anybody answer this
Answer:
Step-by-step explanation:
in the first triangle an angle is 60 degrees so it means that the triangle is half of a equilateral triangle.
in this case the base leg is half of the hypotenuse.
x = 8
in the second triangle we have an angle that is 45 degrees and this means that the triangle has two congruent legs
x = 10
What is the domain of this function?
F(x)=3 square root x-2
x-2>0= x>2
The domain of the function F(x) = 3 [tex]\sqrt{x-2}[/tex] is {x : x ≥ 2 and x is a real number}.
What is Function?A function is a relation from a set A to a set B where the elements in set A only maps to one and only one image in set B. No elements in set A has more than one image in set B.
Given function is,
F(x) = 3 [tex]\sqrt{x-2}[/tex]
Domain of this function is all the values of x for which the function is defined.
The expression [tex]\sqrt{x-2}[/tex] is defined only when the value of x - 2 is positive.
x - 2 > 0 ⇒ x > 2
So the function will be defined for all x > 2.
Hence the domain of the function is the set of all x such that x > 2.
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what is an equation of the line that is parallel to y = - 5 x + 6 and passes through the point (-4,-1)
The equation of the line that is parallel to the line y = - 5x + c and passes through (-4, -1) will be y = - 5x - 21.
What is the equation of a parallel line?Let the equation of the line be ax + by + c = 0. Then the equation of the parallel line that is parallel to the line ax + by + c = 0 is given as ax + by + d = 0.
The equation of the line is given below.
y = - 5x + 6
The equation of the line that is parallel to the line y = - 5x + 6 is written as,
y = - 5x + c
The equation passes through (-4, -1), then we have
- 1 = - 5 (-4) + c
- 1 = 20 + c
- 21 = c
The equation of the line that is parallel to the line y = - 5x + c and passes through (-4, -1) will be y = - 5x - 21.
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2. An empty box has a weight of 350g. When 15 cans of juice are put into it the total weight is
4850g. What is the weight of one can of juice?
Answer: 300
Step-by-step explanation:
15x+350=4850
15x=4500
x=300
A steel pipe 50 cm long has an outside diameter of 2 cm and an inside diameter of 1.8 cm. If the density of the steel is 7.8 grams per cm3, what is
the mass of the pipe to the nearest gram?
Answer:
the volume is 50x1.8x2
v=180cm³
therefore, density is mass/volume
Step-by-step explanation:
mass =density x volume
mass= 7.8 x 180cm³
mass= 1,404grams
The mass of the pipe to the nearest gram mass= 1,404grams.
We have given that,
A steel pipe 50 cm long has an outside diameter of 2 cm and an inside diameter of 1.8 cm. If the density of the steel is 7.8 grams per cm^3
The volume is 50x1.8x2
v=180cm^3
Therefore, density is mass/volume
What is the formula for mass?
mass =density x volume
mass= 7.8 x 180cm^3
mass= 1,404grams
Therefore, The mass of the pipe to the nearest gram mass= 1,404grams.
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Thirty of the 198 students enrolled in Statistics 101 were asked if they wanted Exam II to be atake-home or an in-class assessment. Twenty, or about 67%, of the students polled indicated apreference for an in-class exam. The professor concluded that the majority of the students inthesamplewould prefer an in-class examination for the second assessment. Did the professorperforma descriptive study or an inferential study?
Answer:
Inferential study
Step-by-step explanation:
From the question, we understand that the professor concluded that majority of the class (of 198 students) preferred in class assessment based on the response from 67% of the sample size (i.e 30 students)
When decisions or conclusions are made about an overall population based on a survey carried out on a smaller sample, such study is referred to as an inferential study or inferential research.
Descriptive study on the other hand focuses on the features rather than the result of the experiment of the dataset.
21.
How many sets of 0.3 are there in the number 360?
There are 1200 sets of 0.3 in the number 360
What is the BODMAS rule?According to the BODMAS rule, the brackets have to be solved first followed by powers or roots (i.e. of), then Division, Multiplication, Addition, and at the end Subtraction. Solving any expression is considered correct only if the BODMAS rule or the PEMDAS rule is followed to solve it.
Given here, 360 is to divided by 0.3 thus,
360/0.3 = 3600/3
= 1200
Hence, There are 1200 sets of 0.3 in the number 360
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What is the surface area of the cylinder with height 2 ft and radius 4 ft? Round your answer to the nearest thousandth.
Answer:
Lateral surface area:
A = 2πrh = 2*3.14*4*2 = 50.24 ft²Total surface area:
S = 2πrh + 2πr² = 50.24 + 2*3.14*4² = 150.72 ft²Answer:
Surface Area = 150.796 ft² (nearest thousandth)
Step-by-step explanation:
Surface area of a cylinder
[tex]\sf SA=2 \pi r^2+2 \pi rh[/tex]
where:
r is the radiush is the heightGiven:
radius (r) = 4 ftheight (h) = 2 ftSubstitute the given values into the formula and solve for SA:
[tex]\begin{aligned}\sf SA & = \sf 2 \pi r^2 + 2 \pi rh\\\implies \sf SA & = \sf 2 \pi (4)^2 + 2 p\i (4)(2)\\& = \sf 2 \pi (16) + 2 \pi (8)\\& = \sf 32 \pi + 16 \pi \\& = \sf 48 \pi \\& = \sf 150.7964474... \\& = \sf 150.796 \:ft^2\: (nearest\:thousandth)\end{aligned}[/tex]
Therefore, the surface area of the cylinder with height 2 ft and radius 4ft is 150.796 ft² (nearest thousandth).
I don’t have a question this is just the answer:))
The area of the floor of a cubical room is 49square meter. Find the area of 4 walls of room.
Answer:
If the walls are the standard 8 feet tall and the room is square, then:
the wall length and width is both 7 feet.
The area of the walls would be 4x7x8 = 224 ft² (also providing there are no doors or windows)
Use technology to convert the polar coordinates (5,6.1) to rectangular coordinates. (0.98, – 0.18) (0.98, 0.18) (4.92, – 0.91) (4.92, 0.91)
Answer: (4.92, -0,91)
Step-by-step explanation:
This should be C on edge 2021
Answer:
C: (4.92, –0.91)
Step-by-step explanation:
Took the quiz
I’ll mark brainlist
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No explanation needed but if you want brainlist then u need to do explain
Answer:
B. 6/9 - 4/9
Step-by-step explanation:
Make sure each fraction has a common dominator
2/3 *3/3 = 6/9
4/9 = 4/9
6/9 - 4/9 = 2/9
Answer:
6/9 - 4/9, B
Step-by-step explanation:
y is equal to 5 less than the product of x and -2. If the output is -27, what is the input?
Answer: 27 over 2,5
Step-by-step explanation:
SAVINGS Natalie has $250 in her savings account, into which she deposits $10 of her allowance each week. The balance of her savings account can be modeled by the function f(w)=250+10w, where w represents the number of weeks. Which function g(w) represents the balance of Natalie’s savings account if she withdraws $40 to purchase a new pair of shoes? Describe the translation of f(w) that results in g(w).
Answer:
Answer:Step-by-step explanation:GivenRequiredDetermine g(w)First, we'll write an expression for g(w)From the question, we understand that she withdrew $40 from her account balance in w weeks.This implies that:Where f(w) is the account balance in w weeks and $40 is the withdrawn amountSubstitute 250 + 10w for f(w)Collect Like TermsRecall that:This means that function f(w) when shifter by 40 units downward, gives g(w)
Step-by-step explanation:
Answer the question on the picture
Answer:
theta =111°
hope it helps.
Answer:
69°
Step-by-step explanation:
Sum of angles in a triangle is 180°.
Moreover, because the marked lines are parallel, the third angle of the triangle (first two being 62° and Θ) is equal to 49°
That gives us:
[tex]\Theta = 180^\circ - 49^\circ - 62^\circ = 69^\circ[/tex]
Question
The Gross Domestic Product (GDP) for the United States in the first quarter of 2014 was approximately $1.71 x 1013. If you
wrote this number in standard notation, it would be the number 171 followed by how many zeros?
Answer:
11
Step-by-step explanation:
If you were to write the Gross Domestic Product in standard notation, 171 would be followed by 11 zeros.
What is standard notation?
Standard notation is used in expressing large numbers in smaller numbers. In order to write a number in standard notation, the number is written as a decimal number, between 1 and 10 and multiplied by a power of 10 raised to the number of zeros.
For example:
The number : 2 x 10² is equivalent to 300
The number 3 x 10³ is equivalent to 300
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