Answer:

Step-by-step explanation:
Given
The attached figure
Required
Solve for x
3x and 45 are supplementary angles
So:



Solve for x


Answer:
Step-by-step explanation:
Let x = the original number of books
Then 0.375x = the total number of biographies
and 0.20 x = the original number of biographies

C. It would need to be more than 30 hundredth in order to be greater than 4.3