Louis must ride a mechanical lift to place 20 boxes on a high store shelf.

Question

• Louis weighs 140 pounds.
• There are x boxes that weigh 10 kilograms each and
20 – x boxes that weigh 30 kilograms each.
• A kilogram is 2.2 pounds.

Which expression shows the total weight, in pounds, that will be on the lift?

Answer 1

The expression that shows the total weight, in pounds, that will be on the lift is:

140 + x * 10 * 2.2 + (20 - x) * 30 * 2.2

Explanation:

- 140 represents the weight of Louis.
- x * 10 * 2.2 represents the weight of the x boxes that weigh 10 kilograms each, converted to pounds.
- (20 - x) * 30 * 2.2 represents the weight of the (20 - x) boxes that weigh 30 kilograms each, converted to pounds.

By adding these three terms, we get the total weight, in pounds, that will be on the lift.