Step-by-step explanation:
52.40-4.80
=47.6
47.6÷4
$11.9
The answer is 6*square rooted*2
A nickel is equal to 5 cents or 0.05 dollars.
A quarter is equal to 25 cents or 0.25 dollars.
Let number of nickels be = n
Let number of quarters be = q
...........(1)
As it is given, there are 3 more nickels than quarters so equation becomes,
................(2)
Plug in the value of 'n' from (2) in (1)

= 


As
we get, 
Hence, there are 12 nickels and 9 quarters.
Jenny won the race as she finished the race much more quickly and has greater average speed than Lester.

Jenny: distance/time = 100/15.2 = 6.58 m/s = 6.6 m/s
Lester: distance/time = 100/15.7 = 6.37 m/s = 6.4 m/s
Hope this is what you are looking for the answer is 2(15-2n)