From what I'm reading from this question, there's one answer.
13 + 5 * 1 = 18
Unless maybe I'm missing something?
Total of $7.75
13 more quarters than nickels
15 nickels = $0.75
28 quarters = $7.00
28 - 15 = 13 coins
$7.00 + $0.75 = $7.75
She has 15 nickels and 28 quarters.
Answer: 4n -7
Sam has 4 times than Declan so it would 4n. Amaya has fewer so then you would add the -7 and the equation you get is 4n - 7.
Length of each side of cube is =

SO the volume of cube =

=

=

=

SO the volume of cube is