Use the substitution method to solve the following system of equations:
3x + 5y = 3
x + 2y = 0
a(1, 1)
b(6, −3)
c(6, 1)
d(1, −3)

What is the angle measure, or angle of depression, between this bird and the bird watcher?

Huong is organizing paperback and hardback books for her club's used book sale. the number of paperbacks is 12 less than three times the number of hardbacks. huong had 162 paperbacks. how many hardback books were there?

Solve the system of equations. y=3x-1 and y=-2x+9. show work