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3 years ago

PLEASE HELP OMG IM ON MY FINAL!!! If z varies inversely as w, and z=4 when w=9, find z when w=12

Mathematics

1 answer:

Drupady [299]3 years ago

4 0

z=3. If z varies inversely as w, and z=4 when w=9, then when w=12 the value of z is 3.

The key to solve this problem is using reverse proportionality, in which two magnitudes a and b are inversely proportional when there is a constant k such that

a⋅b=k, where constant k is called the proportionality constant.

Then if z varies inversely as w, and z=4 when w=9

z.w=k -------> 4.9=k -------> k=36

So, let's find z when w = 12. With k = 36

z.w=K, clear z from the equation

z=k/w -------> z=36/12 -----> z=3

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1 year ago

What is the midpoint of a segment with endpoints at(-4,-8) and (8, 10)?

vekshin1

Answer:

The answer is

Step-by-step explanation:

The midpoint M of two endpoints of a line segment can be found by using the formula

$M = ( \frac{x1 + x2}{2} , \: \frac{y1 + y2}{2} )$

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(-4,-8) and (8, 10)

The midpoint is

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We have the final answer as

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3 years ago

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3 years ago

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nevsk [136]

Answer: 480 units^2

IN DEPTH EXPLANATION TO HELP YOU FOR FUTURE PROBLEMS:

Front:
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12*5/2 = 30
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Back:
b*h/2 = sa
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Back = 30 units^2

Right:
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(figures out the length by using
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ADD ALL THE UNITS:
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3 years ago