Jenny Sherrer has $23,000 to invest and believes that she will earn 8% compounded semiannually. Find the future value amounts if she invests for 4 years and for 7 years. Then find the additional amount earned due to the longer period.

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

yes

step-by-step explanation:

yes

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.