X time 0.8 (or 80 percent)= 15
so 15/0.8=X
18.75
A. 8 books on each shelf
B. 4 shelves for mystery, 7 shelves for biography
Answer:
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Step-by-step explanation:
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Answer:
7c^2d-7c+4d-10
Step-by-step explanation:
Start off with the term that has c^2 in it. 5c^2d + 2C = 7c^2d, then since you have multiple choice, the d value differs between the two answer choices that have 7c^2d so you can do +3d +d to get +4d to get the fourth answer choice.
To check your work, you can add/subtract each term to see if you get 7c^2d-7c+4d-10
