Sam went to the hardware store and bought two identical wooden planks. when sam placed the planks end to end, the total length was 78 meters long. how long was each plank?

a 2 quart carton of juice costs $8.42. what is the price per cup? remember, there are 4 cups per quart.

can you answer both questions and tell me what you did step by step?

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)