10 x 7 = 70
1 x 7 = 7
9 x 7 = 70 - 7
9 x 7 = 63
A and C are rational numbers
The answer is B: 11.
To solve it, you need to solve the equation: 20.00=12.85+0.65x
x + y = 4,000
0.1x + 0.04y = 352
Product A represents x and product B represents y. The first equation is the total number of items the store owner buys. The second equation is cost per item for both products. The above system of equations can be used to determine how much product A and product B the store owner bought.
