<span>Let n = the number of nickles Let q = the number of quarters Then for your problem we have (1) n + q = 43 and (2) 5*n + 25*q = 100*6.95 (always work in cents to avoid decimal numbers) or (3) 5*n + 25*q = 695 Now substitute n of (1) into (3) and get (4) 5*(43 - q) + 25*q = 695 or (5) 215 - 5*q + 25*q = 695 or (6) 20*q = 695 - 215 or
(7) 20*q = 480 or (8) q = 24 Then using (1) we get (9) n + 24 = 43 or (10) n = 19 Let's check these values. Is (.05*19 + .25*24 = 6.95)? Is (.95 + 6.00 = 6.95)? Is (6.95 = 6.95)? Yes Answer: Kevin and Randy have 19 nickles and 24 quarters in the jar.</span>
$c/8 You would substitute the c for the pay per hours and follow the expression through to determine each hour's pay, but since it's not asking for an equation, you don't need to add =(amount) to the end
