(4x 10) + (5x2) + (7 x 1 10) + (8 160) = ?

It's 45.78

Step-by-step explanation:

4 x 10 = 40

5 x 1 = 5

7 x 1/10 = 0.7

8 x 1/100 = 0.08

add them all together and you get 45.78

Micah bought 11 gallons of gas in the first week and 8 gallons of gas in the second week

Step-by-step explanation:

Let x be the number of gallons Micah bought the first week. In the second week, he bought 3 fewer gallons of gas than the first week, so he bought x-3 gallons in the second week.

In the first week, he bought x gallons of gas at $2.39 per gallon and paid $2.39x. In the second week, he bought x-3 gallons of gas at $2.49 per gallon and paid $2.49(x-3). This month, he has spent a total $46.21 on gas.

Hence,