Solve the system using substitution.

-x-y=4
3x-4y=-13

A. (-1,3)

B. (3,-1)

C. (-3,1)

D. (1,-3)

C. (-3, 1)

Step-by-step explanation:

i think it’s a i believe

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;