Answer:
The answer to your question is 780 ft²
Step-by-step explanation:
- Divide the figure into two sections an upper part and a lower part.
- Area of the upper part = base x height
= 40' x 18'
= 720
-Area of the lower part
base = 40' - 30' = 10'
height = 24' - 18' = 6'
Area = 10 x 6 = 60
- Total area = Area Upper part + Area lower part
= 720 + 60
= 780 ft²
Answer:
31.6
Step-by-step explanation:
26+18=44
90-44
Y= -3 . Plug the -2 into x. 8x-3y=-7
8(-2) -3y= -7
First we find the common difference by subtracting the first term by the second term. 75 - 69 = 6. So the common difference is 6.
now we need to find the 28th term...we need to do this because we need to use this number in the sum formula.
an = a1 + (n-1)*d
n = term to find = 28
a1 = first term = 69
d = common difference = 6
now we sub
a28 = 69 + (28 - 1) * 6
a28 = 69 + 27 * 6
a28 = 69 + 162
a28 = 231...this is the 28th term
now we use the sum formula
sn = (n(a1 + a28) / 2
s28 = (28(69 + 231) / 2
s28 = (28(300) / 2
s28 = 8400/2
s28 = 4200 <===the sum of the first 28 terms