Question

Christian is comparing two checking accounts. One has a monthly fee of $7 and a per-check fee of $0.20, and the other has a monthly fee of $8 and a per-check fee of $0.15. What is the minimum number of checks Christian needs to write for the second bank to be a better option?

A. 19
B. 21
C. 18
D. 22

@Loveiskey18 @jeherohaku @InYourHead @HomeschoolGrad @ganeshie8

Answer 1

i think its b @Loveiskey18

Answer 2

How did you come to that conclusion?

Answer 3

lol idk i quessed

Answer 4

@Loveiskey18 u there?

Answer 5

7 + .20x = 8 + .15x
.20x - .15x = 8 - 7
.05x = 1
x = 1/.05
x = 20
They are equal when writing 20 checks.
Therefore, when writing 19 checks, A is better.

check...
7 + .20x when writing 19 checks
7 + .20(19)
7 + 3.8 = 10.80 <-- this is better because it is cheaper

8 + .15x when writing 19 checks
8 + .15(19)
8 + 2.85 = 10.85

Answer 6

any questions ?

Answer 7

no thank you :)

Answer 8

anytime :)

Answer 9

this is also the wrong answer, the correct answer is 21 not 20