Beginning with the quadratic equation y=ax to the power of 2 + bx+c , fred calculated -b/2a and then plugged that number in for x to get a y. what is one reason he might have done this?

answer: 1,380

step-by-step explanation:

1: you turn %15 into a decimal by moving the decimal point two places to the left.

2: and then you multiply .15 by 1,200 , which will get you 180.00

3: from there you will add 180 to 1,200

4: which will get you 1,380

hope it *im kind of slow so idk if my answer is right*

i those same problems in math and dont know how to do them