Answer:
7. D:61
8. A:57
9. A: 47
Step-by-step explanation:
Quesiton 7:
To find perimeter we add all the sides together.
x+2x+2x+5=145
Combine all the x's.
5x+5=145
To isolate the constants, subtract 5 from both sides.
5x=140
Now divide both sides by 5 to isolate the x.
x=28
The questions asks for the length of AC, so to find that we need to insert our new x.
AC= 2(28)+5
56+5=61
A $36 item is 25% off. This means we can multiply 36 by 0.25 to find out how big the discount is.
$36*0.25=$9
Answer:
282.7
Step-by-step explanation:
Surface area of Cylinder is 2πr(r+h).
Which in this case is 2π3(3+12) = 282.7 yd^2
You would do 3 times 5 mines 5 which equals 10 and the you would do 5x12
