Since lines a and c are parallel and we are given that c is perpendicular to b, we can infer that b is also perpendicular to a.
So, a and b are perpendicular, the angle formed by these lines should be 90.
Hence, angle 2 is 90.
Hope this helps :)
In terms of a fact family you could use the answer 6+9=15
27.50 x 4 = 110
27.50 x 5 = 137.5
First you need to calculate the commission earned on sales
(13,175 + 28,314 + 19,628) * 0.025 = 1,523.43
Then add to the monthly base salary
1,523.43 + 900 = 2,423.43
The total amount of money earned that month is $2,423.43.
Multiply 20x3 and u will get your answer from there