(9b -7) +(7-3b) - (-3-3b) +(6+3b) = 9b -7 + 7-3b +3 + 3b + 6+3b = 12b + 9
We have 4 numbers (9b -7) and (7-3b), and - (-3-3b), and (6+3b).
To find the average, we need the sum of these numbers 12b + 9, divide by 4.
(12b + 9)/4 = 3b +9/4
Answer is A.
It’s the one that has perimeter at the top and 4 sections that each day side length
Answer: the equation to determine the value of n is 5n = 105
Step-by-step explanation:
The measure of angle a is n degrees. The measure of angle b is four times angle a. This means that the measure of angle b would be
b = 4n
The measure of angle c is 75 degrees. Since the sum of the interior angles of a quadrilateral is 180 degrees, then the equation to determine the value of n would be
a + b + c = 180
Therefore,
n + 4n + 75 = 180
5n = 180 - 75
5n = 105
n = 105/5
n = 21