Matt gave 5 apples to his son and sold 8 times as many apples. If Matt had 1/2 of the apples left, how many did he have in the beginning?

90

Step-by-step explanation:

8*5 = 40

40 + 5 = 45

1/2 x = 45

x = 90

90 apples

Step-by-step explanation: If Mat sold 8 times as many apples as how much he gave to his son, this means he sold 40 apples.  Altogether, he loses 45 apples (5 to his son, 40 sold), and this is 1/2 of the original numbers of apples.  Hence, the original number of apples was 90

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.