17 adam has $2.15 in nickels, dimes and quarters in his pocket. if the number of dimes is 4 less than the number of nickels, and 5 more than the number of quarters, then how many of each type of coin does he have?

12 nickels, 8 dimes, 3 quarters

Step-by-step explanation:

    Nickels     + Dimes +  Quarters   = Total

0.20 + 0.05d + 0.10d + 0.25d - 1.25 = 2.15

                                       0.40d - 1.05 = 2.15

                                       0.40d           = 3.20

                                               d            = 8

Nickels: 4 + d   = 4 + (8)   = 12

Quarters: d - 5   = (8) - 5   = 3

Check:

Nickels:   0.05(12)  = $0.60

Dimes:     0.10 (8)   = $0.80

Quarters: 0.25(3)   = $0.75

                Total:     = $2.15  

marco saved more.   he saved $35 more.

step-by-step explanation:

1+2+3+4+5+6+7+8+9+10 = 55

2*10 = 20

55-20 = 35

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b