Decompose the terms in the sum as

so there are 20 terms in the sum. Then our sum simplifies to

Now, if

we can reverse the order of terms to get the same sum,

so that doubling up the sum gives

So, our sum evaluates to

so 24cm out of 300 cm is spliced
24/300 is the fraction
we can simplify this by dividing top and bottom by 3 to get
8/100
we can divide top and bottom by 4 to get
2/25 is the most simplified fraction
Answer:
Incorrect
Step-by-step explanation:
(9×13) - (5×2) - (3×6)
117 - 10 - 18
= 89 ft²
graphed it with desmos (free as app and website).
the solutions are in the screenshot
(1, 3)
(3, 7)