Answer:

Step-by-step explanation:
<u>Area of a rectangle</u>
A rectangle of width W and length L has an area of:
A = W.L
The given rectangle has a length of L=10 inches and a width of W=8 inches, thus its area is:
A = 8*10 = 80

If each corner is cut by a square of x*x, then the total area will be:

The new area is
square inches
Let's look at the math; half a disk takes 40 seconds to rip, and two halves make a whole, so 40 + 40 = 80 and that's your answer
Triangle AGB is congruent to Triangle CGB.
A= 4/32 and 5/40
B= 9/21 and 6/14
C= 2/5 and 16/40
F(x)=x^2+3x-7, x=3
f(3)=3^2+3(3)-7
f(3)=9+9-7
f(3)=11