Question

Liberal Arts Math

Answer 1

Any idea?

Answer 2

Nope

Answer 3

d+q =40 , do you know why?

Answer 4

I'm sure you'll tell me:)

Answer 5

Read the problem, it says: let d is number of dime, q is number of quarter and "she has 40 coins"
so that d + q= 40

Answer 6

It says it's wrong

Answer 7

1dime = 10 cents
1quarter = 25 cents
total she has $7.75 = 775 cents
hence 10*d + 25*q = 775

Answer 8

Oh

Answer 9

So far, you have 2 equations
\(\begin{cases}d+q= 40\\10d+25q=775\end{cases}\)
solve it and you get the answer.