Answer:
I think its D
Step-by-step explanation:
lmk if its wrong
Distribute first
a(b+c)=ab+ac
7y(8y-7)=56y^2-49y
now we have
56y^2-49y+46y
56y^2-3y
tada
15.78 is the answer to the qustion that you have asked.
I think it's the second equation. I could be wrong but I think that's what it is
Using weighted average, it is found that she should score 67% on the computer science test.
- The weighted average is given by <u>each proportion multiplied by it's score</u>.
In this problem, the proportions and scores are given by:
- Proportion of 32% = 0.32 for a score of 300.
- Proportion of x for a score of 200.
- Proportion of 46% = 0.46 for a score of 300 + 200 = 500.
Then
![0.32(300) + 200x = 0.46(500)](https://tex.z-dn.net/?f=0.32%28300%29%20%2B%20200x%20%3D%200.46%28500%29)
![200x = 0.46(500) - 0.32(300)](https://tex.z-dn.net/?f=200x%20%3D%200.46%28500%29%20-%200.32%28300%29)
![200x = 134](https://tex.z-dn.net/?f=200x%20%3D%20134)
![x = \frac{134}{200}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B134%7D%7B200%7D)
![x = 0.67](https://tex.z-dn.net/?f=x%20%3D%200.67)
She should score 67% on the computer science test.
A similar problem is given at brainly.com/question/24855677