HELP PLEASE BRAINLIEST 1. When you add two opposite numbers (Ex. -4 and 4 or 10 and -10), they will cancel each other out.

True

False

2. The OPPOSITE of multiplying by a number is to subtract by a number.

True

False

True, False

Step-by-step explanation:

I am unsure as to why this is considered High School Math but here’s the reasoning.

For question 1, adding two opposite numbers will result in a cancellation to 0 because the numbers will simply be adding or subtracting themselves. 4+ (-4) = 0. Same with 10 + (-10).

For question 2, the opposite of multiplying by a number is to divide by the number, not subtracting. If you divide a number by the same number you multiplied with intially, you will always receive the same initial number. With subtraction, there is the possibility that this will not work. For example, 3 x 8 = 24, but 24 - 8 ≠ 3.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm