Answer:
If your asking if your work is correct, its not.
Each triangle has an area of 10 inches
the total area of the placemat is 420 inches
Step-by-step explanation:
Formula for area of a triangle is 
b · h
Answer: The answer is = 2x^2 -11x-40
Step-by-step explanation: a= 2x, b=5, c= x, d =8
= 2xx + 2x (-8) + 5x +5(-8)
+ (-a)=-a
then simplify =2xx-2 -8x+5x.8
2xx=2x^2
2.8x=16x
5.8=40
=2x - 16x + 5x- 40
Answer:
diameter=22
circumference=22pi
Step-by-step explanation:
diameter=2*radius
so 2*11=22
circumference=2pi*r
=2*11*pi
=22pi
Answer:
The algebraic expression you are looking for is:
x^2*9
