Answer:
A
Step-by-step explanation:
13 x 6 = 78 it cant be multiplied anymore so it can go into 80 about 6 times.
Y = 12x......y = 12(4).....y = 48.....so she pays $ 48 for the old brand when buying 4 boxes
y = 8x...y = 8(4)......y = 32...so she pays $ 32 for the brand she changed to, when buying 4 boxes
so the super saving brand would save her (48 - 32) = $ 16 per month
Step-by-step explanation:
hope it helps you........