First we have to work out the area of the trapezoid using the formula;
1/2 (a+b) h
The height is 16ft, and a = 24ft, and b = 15ft
Put this into the formula
1/2 (24 + 15) 16
1/2 39 * 16
39 * 8 (you can halve the 16)
= 312 ft squared
Now we simply multiply the area by the cost per square foot to get our answer.
312 * 0.79 = $246.48
First part from the working out
Answer:
(attached file #2)
Step-by-step explanation:
let's change the variable n to a variable x (it can be x and y):
x ≥ -8
go to the X-axis which is the line going horizontal, just as the first picture attached!
2. Now go to the -8 on that line and draw a straight bold line going up (vertical)
and there you have the answer to the question.
if the question was with this symbol: < or > then the line would be dashed instead of being a bold solid straight line!
Hope this helps,
Lucas
Cos28 = x/4 so to get rid of the fraction , multiply each side by 4 so it'll be
4cos28 = x
x = 3.531790371
Hope this helps=)