Using the quadratic formula, we have:

, so our solutions are

and

.
Answer:
x = 15°
Step-by-step explanation:
(5x-15) + 75 + 3x = 180
8x + 60 = 180
8x = 120
x = 15°
Answer:
x=18
Step-by-step explanation:
Vertical angles are congruent. This means that they are equal to each other. So, to solve set them equal to each other and isolate x. First, set up the equation. Then, subtract x from both sides. Finally, add 11 to both sides and simplify.
1) 
2) 
3)
D. The combined expenses In Year 3 and 4 were $300,000 more than the combined of Year 3 and 4
6.9ft
So clearly in this situation the side length of the cloth is the square root of 48, which is 6.928.... closest to 6.9ft