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How do you do this and what's the answer? Explain plz.

How do you do this and what's the answer? Explain plz.-example-1
User LaurieW
by
7.8k points

2 Answers

7 votes

We are given that T = test score, and x = # of hours studied. We are given the same information in numbers:

T = 90

x = 6

y = ?


We need to figure out y in terms of k. Let's set up what we know:


T = (x)/(ky)


90=(6)/(ky)


Let's multiply both sides by y to get rid of it on the right side:


90y = (6)/(k)


Now, let's divide by 90 on both sides to get rid of it from the left side (and solve for y):


y = (6)/(90k)


Your answer is A! If any part didn't make sense, you know where to reach me.

User Joe Holt
by
8.1k points
4 votes

Givens

Number of hours she studies = x = 6

Number of classes she misses = y

Test score = T = 90


Equation

T = x/(ky)


General Equation

Solve for y before you do anything else.

Multiply the entire equation by ky

T*ky = x Divide Both sides by Tk


y *kT/kT = x / (Tk)

y = x / kT


Now put the numbers in

y = 6 / k*90

That looks pretty much like A. doesn't it?



User Clarissa
by
8.4k points

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