Simplify -7(4r -3)
a) -28r + 21
b) -28r -10
c) -28r - 21
d) -3r -10

A) -28r + 21

Step-by-step explanation:

-7(4r -3)

Distribute the -7

-7*4r -7*(-3)

-28r +21

For this case we must simplify the following expression:

We apply distributive property to the terms within the parenthesis taking into account that and .

The distributive property states that:

So:

Option A

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)