91.5 is the perimeter. It's just 5a.
Answer:C
Step-by-step explanation:
Answer: Exactly One Solution
Step-by-step explanation: All you have to do is evaluate the problem.
9z - 6 + 72 = 162 - 6
9z - 6 + 72 = 156
9z + 66 = 156
9z = 90
z = 10
Answer:
58 miles per hour
Step-by-step explanation:
First you need to divide 80 by 10 to see how many miles she was over the speed limit.
80/10 = 8 miles over the speed limit.
The speed limit was 50, so 50 + 8 = 58 miles.
So Cathy was driving at 58 miles per hour
Answer: Hello mate!
our equation is 18√5−12√5 and we want to simplify it.
Simplification is triyng to "eliminate" all the roots (if possible). In our equation we have a square root of 5, wich is a problem, but let's se wat we can do:
18√5−12√5
= (18 - 12)√5
= 6√5
and we can not simplify furthermore, because the √5 cant be simplifyed.
