10+10+10+10= 40
40+38+40+35+35= 188 total perimeter
Answer:
6(x+2)=66
6x+12=66 -12
6x= 54 :6
x=9
Step-by-step explanation:
prove me wrong
After one hour, the plane is 225 miles from its destination
Answer: f(12) = 137, f(-7) = 42
Step-by-step explanation: In a function, what you want to do is plug in the value they give you for x. This means you substitute x with the value they are looking for.
In this case, they are looking at 12 and -7. Let's do 12 first.
The equation becomes (12^2) - 7. 12^2 is 144, and 144-7 is 137.
Now we do -7. The equation becomes (-7)^2 - 7. -7^2 is 49, and 49 - 7 is 42.
Hope this helped!
