Answer:
In step 2, he needed to divide both sides of the equation by 5
Step-by-step explanation:
we have

Solve for a------> That means isolate the variable "a"
step 1
Subtract 2b to both sides


step 2
Divide by 5 both sides


Answer:
The measurement of x is 56 degrees.
Step-by-step explanation:
Below that angle is a straight line measuring 180 degrees, so if one part of that 180 is 124 you would take 124 from 180.
180-124=x
x=56
Hope this has helped have a great day.
Answer: 70.74
Step-by-step explanation:
A Nonagon has 9 equal sides, and each side of the given is 7.86
So 7.86 multiplied by 9 is 70.74