Answer:
800.8
Step-by-step explanation:
Let, the height be h.
Then, sin72 = h/842
h = sin72 * 842
= 800.7895 = 800.8
[please inform if I'm wrong]
A positive + A positive = A positive (1+2=3)
A negative + A negative = A negative (-1+(-2)=-3)
Adding a negative is like subtracting a positive (1 + (-2) = -1) this is equal to (1 - 2 = -1)
Adding a positive is like subtracting a negative (-1 + 2 = 1)
Answer: The answer is D
Step-by-step explanation: I just did the question.
We can see that the lines intersect at (-5,3) on the graph, so that eliminates choices B and D. Both A and C say that the first line is y=x+8, which is true. A says that the second line is y+x=-2, and after isolating y, we get y=-x+2, which seems correct. Do the same for C, and you will find that it says the other equation is y=x-2, which is not true because it must have a negative slope. So your answer will be choice A.
Combine like terms.
2x + 6 + 6x - 1
8x + 5
