Respuesta :
Answer: There are 7 quarters in all.
Step-by-step explanation:
Let the number of nickels be 'x'.
Let the number of quarters be 'x'.
1 nickel =$ 0.05
1 quarter = $0.25
So, According to question,
[tex]0.05x+0.25x=2.10\\\\0.3x=2.10\\\\x=\dfrac{2.10}{0.3}\\\\x=7[/tex]
Number of nickels = Number of quarters = 7
Hence, there are 7 quarters in all.