Answer:
y=2
Step-by-step explanation:
y+7=9(y-1)
y+7=9y-9
16=8y
2=y
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 48 and a standard deviation of 9. Using the Standard Deviation Rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 30 and 66?
Answer:
95.44%
Step-by-step explanation:
Mean (m) = 48
Standard deviation (sd) = 9
n = 12
Zscore = (x - m) /sd
X = 30
Zscore = (30 - 48) / 9
Zscore = - 2
X = 66
Zscore = (66 - 48) / 9
Zscore = 2
percentage of daily phone calls numbering between 30 and 66 = P(z < 2) - p(z < - 2)
P(z < 2) = 0.9772
P(z < - 2) = 0.0228
Hence,
0.9772 - 0.0228 = 0.9544
0.9544 * 100% = 95.44
Proving Triangles congruent: ASA, AAS, SAS SSS
Cate:
For each problem give the correct naming order of the congruent triangles Write that name in order on the
lines for the problem number (see box at bottom) Aso indicate which postulate or theorem is being used
2
AVAVAV
N
ASC.
ABC a
by
LABCO
Answer:
WIR by SAS
EHS by AAS
GTN by SSS
Able has a younger sister and an older brother.
- Able’s age can be represented by x.
- Able’s sister is 4 years younger than him.
- Able’s older brother is twice as old as he is.
- The combined age of all three siblings is 32.
How old is Able’s younger sister?
9 years
13 years
5 years
3 years
Answer:
5 years
Step-by-step explanation:
1. if able's age is x, then his sister's is x-4, and his brother's is 2x
2. if these sum to 32, then we can formulate the equation x+(x-4)+2x=32
3. now solve for x, 4x-4=32, 4x=36, x=9
4. if able's sister is x-4 years old, she is 9-4, or 5 years old
Jessica is buying roses to sell at a fundraiser for school. She needs to purchase the roses at the lowest price per rose to allow for the highest profit margin. The roses are sold in bunches of 4, 6, 8, or 12. The chart below shows the prices for the different bunches of roses. Roses in Bunch Price 4 $7.98 6 $8.50 8 $10.25 12 $12.25 Based on the information in the chart, which size bunch would be the least expensive per rose? A. 4 B. 6 C. 8
Answer:
how do i comment
Step-by-step explanation:
Which table shows a proportional relationship ?? Pls help
Answer:
Option 2
Step-by-step explanation:
If you multiply 2 by 2 you get 4. If you multiply 3 by 2 you get 6. If you multiply 4 by 2, you get 8. If you multiply 5 by 2 you get 10. A proportional relationship is where you can multiply all the numbers by a certain number to get the answer. In this case, all the numbers in the left column could get multiplied by 2 to get the number in the right column.
I HAVE 5 MINUTES PLZ HELP ! (its a slope problem)
Answer:
-1/4
Step-by-step explanation:
Simply draw a slope triangle
Answer:
its -1/4 which is the third option
Step-by-step explanation:
negative because it's going down, 1/4 because every four blocks to the right it goes down by only one block
OK, this question is a little complicated. Solve v, 5/v=7.25
Answer:
Hope this helps you .....
Answer:
[tex]v=\frac{145}{8}[/tex]
Step-by-step explanation
[tex]\frac{5}{v}=\frac{2}{7.25}[/tex]
[tex]\frac{5}{v}=\frac{2}{\frac{725}{100}}[/tex]
[tex]v=\frac{2}{\frac{5^2*29}{2^2*5^2}}[/tex]
[tex]v=\frac{145}{8}[/tex]
Emily is adding 51 and 29. Which steps can she use to add the numbers
Answer: She can first add 20 to 51, 51+20=71, then she can add 9, 71+9=80.
So 51 + 29 = 80
Step-by-step explanation: Hope this helps!
6. A set of data points has a correlation coefficient r = -0.86. Your friend claims
that because the correlation coefficient is close to -1, it is reasonable to use the
line of best fit to make predictions. Is your friend correct? Explain your reasoning.
Answer:
Yes
Step-by-step explanation:
The line of best fit is used in linear regression models to make predictions, the line of best fit gives the relationship between the dependent and independent variables by obtaining the Coefficient of correlation. The Coefficient of correlation is a value which ranges from - 1 to 1. With values close to either - 1 or 1 depicting a strong negative and positive relationship respectively. Hence, with a correlation Coefficient of - 0.86, which signifies a strong negative relationship, then we can go ahead and make prediction using the model.
Evaluate the function f(x) = sec(x - ) for x = 0.
Will give brainliest will give brainliest will give brainliest and 60 think point
Answer:
∠3 and ∠2
Step-by-step explanation:
Adjacent angles are angles that have a common side and common vertex which each other.
The first option is incorrect because they don't share a common side. They do share a vertex but that isn't enough to call them adjacent.
The second option is correct because they share a common side and vertex.
The third option is incorrect because they don't share a common side.
The fourth option is incorrect because they don't share a common side. These two angles are congruent and opposite angles.
Best of Luck!
Answer:
3
Step-by-step explanation:
Plz help
2.
The midpoint of AB is M. If the
coordinates of M are (,-2) and
the coordinates of B are (6,1),
what are the coordinates of A?
a) (-5,-5)
b) (2, -10)
c) (-10, 2)
d) (-13/4,-3/2
e) (-5,5)
Answer:
A
Step-by-step explanation:
the distance between M and point be is 5.5 for the x coordinate and 3 for the y coordinate. to find point b you added 5.5 to to the x and 3 to the y so if you subtract this from point M you get (-5,-5).
Suppose you had two circular objects. Let the first circular object have a diameter of 26 cm and let second circular object have a diameter that is half as long as the diameter of the first. What would the circumference be for the second item in centimeters?
Answer:
its sonar
Step-by-step explanation:
h bug
EMERGENCY PLEASE HELP (22 points)
Look at pic to see problem
Answer:
(-4, 7)
Step-by-step explanation:
x is found on the x axis its -4
to find y you go up to where the point bvb is it is located at positive 7
Answer:
(-4,7)
Step-by-step explanation:
This is the answer because the x-axis is -4, and the y-axis is 7. If it was put in any other way it would be wrong.
Can someone please help me with these 50 points I just don't get it I need help?
Answer: I think the first one is A. and the next one is B
Step-by-step explanation:
a fish tank is in the shape of a cube the. volume of the fish tank is 64 cubic feet. What is the area of one face of the fish tank in square feet?
16 square feet (also can be written with an exponent 2 as in 16 ft^2)
Cube root of 64 is 4.
Why cube root? Because you need to multiply three numbers to get volume ( length, width, height.)
4x4 is 16.
Area, so you have to add the square feet
16 ft^2
Or
16 square feet
Pls mark branliest if this helped
please help me solve this problem
Which of the following can you add/subtract?
A) 5√4 + 6√4
B) 3√7 − 3√5
C) 9 √ + 39√
Answer:
A
Step-by-step explanation:
you can only +/- an equation like this with the same square root
Is -3/4 rational or irrational
Answer:
Rational
Step-by-step explanation:
The fraction -3/4 can be written as a ratio, and is a finite amount, making it rational.
5) 2-X = 15
Find the value of x
Answer:
x= -13
Step-by-step explanation:
-x= 13
x=-13
Answer:
13 urgupieux8ttc9y d6 og
1. Brand A scooter has a top speed that goes 2 miles per hour faster than Brand B. If after 3 hours, Brand A scooter traveled 24 miles at its top speed, at what rate did Brand B scooter travel at its top speed if it traveled the same distance? Write an equation to determine the solution. Identify the if-then moves used in your solution.
Answer:
6 miles/hr
Step-by-step explanation:
Given:
Top speed of Brand A scooter goes 2 miles per hour faster than Brand B.
Distance traveled by brand A scooter on its top speed in 3 hours = 24 miles
To find:
The rate at which brand B traveled the same distance at its top speed ?
Solution:
Let the top speed/rate of brand B scooter = [tex]x[/tex] miles/hr
According to question:
Top speed/rate of brand A scooter = [tex]x+2[/tex] miles/hr
Formula:
[tex]Distance = Speed \times Time[/tex]
Distance is given to be equal to 24 miles:
24 = ([tex]x+2[/tex]) [tex]\times 3[/tex] ...... (1)
Solving the above equation by first dividing the equation on both sides with 3:
[tex]\dfrac{24}{3} = \dfrac{(x+2)\times 3}{3}\\\Rightarrow 8 = (x+2)[/tex]
Now subtracting 2 from both the sides:
[tex]\Rightarrow 8-2=x+2-2\\\Rightarrow x=6\ miles/hr[/tex]
Therefore, the answer is:
Top speed of scooter B is 6 miles/hr.
The if-then moves used to solve the equation (1) are:
Dividing by a non zero number on both sides, then subtracting a number on both sides.
According to the chart, which building took longer to construct: the Taipei 101 or the Petronas Towers?
Answer:
im not 100 percent sure but i think its the taipei 101
Step-by-step explanation:
im brain dead and i dont even trust myself but i passed the quiz so hope this helps
Answer:
C. they took the same amount of time
Step-by-step explanation:
5(2x-3)=24
Help me in this pleasee
Answer:
x = 3.9
Step-by-step explanation:
5(2x-3)=24
Distribute
10x -15 = 24
Add 15 to each side
10x-15+15 = 24+15
10x = 39
Divide each side by 10
10x/10 = 39/10
x = 3.9
A Toy Story poster is enlarged. The new length is 5 feet and the width is 3 feet. The original length was 6 inches what was the width?
The next train will arrive in 32 minutes and 30 seconds.
In how many seconds will the next train arrive?
Answer:
1950 seconds
Step-by-step explanation:
if sixty seconds are in a minute, then you just multiply 32, the number of minutes by the number of seconds in a minute and add 30.
You typed a 600 word essay in 12 minutes. Let w be the number of words you can type in one minute. Can w be 60?
Answer:
w = 50
Step-by-step explanation:
600 = 12w
600/12 = 12/12w
w = 50
99/225 simplified to the lowst term
Answer:
[tex]\frac{11}{25}[/tex]
Step-by-step explanation:
Answer:
11/25 the lowest this fraction can go.
Is the difference of 18 and 3 a rational number?
Answer:
it is a whole number but because rational numbers include all intergers and whole numbers it is also a rational number
Step-by-step explanation:
Need help ASAP
Please
Answer:
area:[tex]16x^2+24x+9[/tex] Perimeter: 16x+12
Step-by-step explanation:
area :[tex](4x+3)^2[/tex]
thats [tex]16x^2+24x+9[/tex]
P: 4(4x+3)
thats 16x+12
Hope this helped you
<3
Red
Answer:
Perimeter is all sides added together, while Area is one side height times length
Step-by-step explanation:
Since your shape is a square all sides are equal so the equation is the same for all sides
Perimeter = 4z+3+4z+3+4z+3+4z+3 or (4z+3)4
14z+12 <= answer for perimeter
Area = (4z+3) (4z+3)
16z^2+12z+12z+9
16z^2+24z+9 <= answer for area
convert the mixed number into a decimal. 5 1/4 That is the fraction of 5 and 1/4
A. 5.25
B. 5
C. 525
D. 52.5
Answer:
The answer is A.
Step-by-step explanation:
I did it.