Question

Eric has 130 coins consisting of nickels and quarters the coins combined value comes to 15.90

Answer 1

Quarters = 47

Nickels = 83

Explanation:

A) N + Q = 130

B) .05N + .25Q = 15.90

Multiplying equation A by -.05 equals

A) -.05N -.05Q = -6.50 then adding this to B)

B) .05N + .25Q = 15.90 Equals

.20Q = 9.40

Quarters = 47

Nickels = 83

.05*83 + .25*47 = 4.15 + 11.75 = 15.90

Answer 2

A) N + Q = 130

B) .05N + .25Q = 15.90

Multiplying equation A by -.05 equals

A) -.05N -.05Q = -6.50 then adding this to B)

B) .05N + .25Q = 15.90 Equals

.20Q = 9.40

Quarters = 47

Nickels = 83

.05*83 + .25*47 = 4.15 + 11.75 = 15.90

Explanation: