Answer:
b=-a
Step-by-step explanation:
we know that b is located the same distance from 0 as another number, a, but in the opposite direction.
so the sum of the two numbers equal zero
a+b=0
a=-b or b=-a
Answer:
70
Step-by-step explanation:
Answer: 
<u>Switch operations</u>
Before: 
After: 
Before you switch operation you remove the subtraction sign where -(16) is.
Answer:
5400
Step-by-step explanation:
6x900 =5400 this is the correct answer
11 and 12
7 and 512
12 and 10
0 and 78
left side numerator
right side denominator