Hi, to answer this question we have to write a system of equations:
n = number of nickel coins
q = number of quarter coins
Since there are 11 coins, the sum of the number of nickels and quarters must be 11:
n+q =11
Since:
1 nickel = $0.05
1 quarter = $0.25
The total value (1.15) must be equal to the product of the number of nickels (n) and the value of each nickel in dollars (0.05); plus the product of the number of quarters (q) and the value of each quarter in dollars (0.25)
The troop wants to sell a minimum of 1,000 boxes, so we're looking for the smallest number of boxes they can sell and still meet the goal. Since there are 13 girls in the troop, take the ceiling (round up to the nearest whole number) of 1,000 divided by 13:
