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3 years ago

Set up the proportion and find AB. Show all work and box your answer

Mathematics

1 answer:

velikii [3]3 years ago

6 0

Answer:

x = 129

Step-by-step explanation:

86/48 = x/72

6192 = 48x

x = 129

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If SS= 162 from a sample of 15 data, find s^2

Genrish500 [490]

Answer:

11.57

Step-by-step explanation:

We have a simple formula to solve this:

$s^2=\frac{SS}{n-1}$

where

SS is sum of squares

s^2 is the variance, and

n is the number of data points

We are given all the info to find out s^2. Hence,

$s^2=\frac{SS}{n-1}\\s^2=\frac{162}{15-1}\\s^2=\frac{162}{14}=11.57$

8 0

4 years ago

X^2+_x+_=0<br> Please help need to pass this class

snow_tiger [21]

Answer:
x^2+0x+(-x^2)=0

Explanation:
x^2+0x+(-x^2)=0
Anything multiplied by 0 is equal to 0
x^2+0+(-x^2)=0
x^2+(-x^2)=0
A positive and a negative makes a negative
x^2-x^2=0
0=0

For these types of problems, play around with multiplying by 0 and adding negatives.

I hope this helps! Please comment if you have any questions.

7 0

3 years ago

6) 13x + 5y = -40<br> What’s the answer

stellarik [79]

This is for the answer to X

5 0

3 years ago

The price tag on the remote-controlled helicopter said $79. If Jimmy buys the

vredina [299]

Step-by-step explanation:

79×0.08 = 6.32 (tax)

79(price) + 6.32(tax) = 85.32

3 0

3 years ago

If an object is propelled upward from a height of s feet at an initial velocity of v feet per second, then its height h after t

irina [24]

Answer:

At 1.5 seconds and 2.5 seconds

Step-by-step explanation:

Because this is parabolic motion, the object will reach the height of 68 feet when it's going up AND when it's coming down. In order to find out those times, you set the h on the left side of the equation equal to 68, because h stands for height.

$68=-16t^2+64t+8$

Set that equal to 0 and factor to solve for t:

$-16t^2+64t-60=0$

Using the quadratic formula, we get t = 1.5 and t = 2.5

8 0

4 years ago