Answer:
n²-7n-21
Explanation:
Given the expression:

First, open the brackets:

Next, bring the like terms together and simplify:

The perimeter will be
.. P = 2√(16^2 +30^2) = 2*34 = 68
The answer is 3 because 3×5=15
Step-by-step explanation:

Answer:
77
Step-by-step explanation:
Rate as BRAINLIEST
x + 9y
we plug in x and y
5+9(8)
=5+72
= 77