(-7+7i)-(-7-3i)+(-7-8i) i need help

Step-by-step explanation:

(-7 + 7i) - (-7 -3i) + (-7 - 8i) = -7 + 7i -7*(-1) -3i*(-i) - 7 - 8i

                  = -7 + 7i + 7 + 3i - 7 - 8i

                   = -7+ 7 - 7 + 7i +3i - 8i

Combine like terms

                  =  - 7 + 2i

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;