Answer:
60
Step-by-step explanation:
We can use the pythagorean theorem to find the leg.
10^2+x=13^2
x=12
We now find the area given the height of the triangle.
10 X 12=120
120/2=60
From the 3rd term to the 8th term, we'd need to use the "common difference" or "d", 5 times, namely add it that many times, to get the 8th term, thus

we know the 3rd term is -12, so the first one has to be -12+5+5, undoing the -5's, so the first term is -2.
Match the graph with the correct set of equations for each linear system.