Question

james has $4.40 in pennies (0.01) and nickels (0.05). if there are twice as many nickels as pennies, how many pennies does james have?

Answer 1

A) .01p + .05n = 4.40B) 2p = nSubstituting this into equation A)A) .01p + .05 * 2p = 4.40A) .01p + .1p = 4.40A) .11 p = 4.40A) p = 4.40 / .11p = 40 penniesThere are twice as many nickels80 nickels
Double Check:80 nickels = 80*.05 = 4 dollars40 pennies = .40 dollarsTotal = 4.40