Step 1
From the question;

We are required to find how many months it will take him to read 90 books
Step 2
We will use the ratio below to solve the problem.

Answer; It will take Bobby 9months to read 90 booj
X³ = -1000
x = ∛-1000
x = -10
In short, Your Answer would be: -10
Hope this helps!
Answer: 43
Step-by-step explanation:
5-2+7x6-2
3+42-2
45-2
43
I think its like if you got 80% on a quiz and 20% on the exam then your grade would be 60% which is usually a F