@ganeshie8 @Yttrium

Dewayne is comparing two checking accounts. One has a monthly fee of $7 and a per-check fee of $0.30, and the other has a monthly fee of $4 and a per-check fee of $0.40. What is the minimum number of checks Dewayne needs to write for the first bank to be a better option?

A. 29
B. 30
C. 31
D. 28

Question

@ganeshie8 @Yttrium 

Dewayne is comparing two checking accounts. One has a monthly fee of $7 and a per-check fee of $0.30, and the other has a monthly fee of $4 and a per-check fee of $0.40. What is the minimum number of checks Dewayne needs to write for the first bank to be a better option?

 		A.	29
 		B.	30
 		C.	31
 		D.	28

ganeshie8 · Answer

setup an inequality

ganeshie8 · Answer

say she writes $x$ checks,

first bank charges her :
7 + 0.3x -------------------(1)

ganeshie8 · Answer

can u setup how much second bank charges her, if she writes $x$ checks  ?

ganeshie8 · Answer

Yo ?

anonymous · Answer

im confused

ganeshie8 · Answer

it is better if u can *see* this on ur own, my explanation wil make u more confuse

ganeshie8 · Answer

basically, we want to express how much each bank charges mathically
ive already setup how much first bank charges for you, see if u can setup an expression for 2nd bank

anonymous · Answer

ok ill try

ganeshie8 · Answer

good :)

ganeshie8 · Answer

we just need to stare at below line in the question :-
the other has a monthly fee of $4 and a per-check fee of $0.40.

ganeshie8 · Answer

they're charging $4 flat, and per check they're charging $0.40

so, if she writes $x$ checks, this bank charges her :

4 + .4x -------------(2)

ganeshie8 · Answer

see if both expressions make sense, rest is bit easy i promise :)