Alex has 84 quarters and nickels worth a total of $17.80.

which equation can be used to find q, the number of quarters alex has?

0.25q + 0.05(q – 84) = 17.80
0.05q + 0.25(84 – q) = 17.80
0.25(q – 84) + 0.05q = 17.80
0.05(84 – q) + 0.25q = 17.80

Equation is used for finding numbers of quarters (q) is 0.05 (84-q) + 0.25q = 17.80 .

Step-by-step explanation:

Let us assume that the number of nickel is represented by n .

Let us assume that the number of quarters is represented by q .

As given

Alex has 84 quarters and nickels worth a total of $17.80.

Than the equation becomes

n + q = 84

As

1 quarters = $ 0.25

1 nickel = $ 0.05

Than the equation becomes

Value of quaters in dollars × q + Value of nickel in dollars × n = Total cost of dollar

0.25q + 0.05n = 17.80

Thus two equations are

n + q = 84

0.25q + 0.05 n = 17.80

(As n + q = 84 thus n = 84 - q)

Putting n = 84 - q in the equation 0.25q + 0.05 n = 17.80.

0.25q + 0.05 (84-q) = 17.80

Therefore the equation is used for finding numbers of quarters (q) is 0.05 (84-q) + 0.25q = 17.80 .

idk do it yourself or ask somebody idk stop going online asking for

the correct answer is x/3+10≥32

hope this !