Use the sum of cubes factoring rule
to transform the left hand side into the right hand side.
Throughout the entire process, the right hand side stayed the same.
On the last step, I used the pythagorean identity.
8.
9.
The sum of two sides must be greater than the third side.
It can't be 5 because
.
It can't be 7 because
.
It can't be 17 because
.
So it's 12.
10.
a. Turk, McAllister
b. Market, Mission, Howard
c. not sure about this one
The answer is C. 3/5
20 girls, 3 boys. 23/40 is about 60 percent, or 3/5.
I wrote the wrong answer on accident for whatever reason when I first sent this, I apologize.
Since this is a 45-45-90 triangle, n = 9 and m = x
divide 486 by 9 = 54
it would take about 54 minutes