Angelica solves the system { x + y = -3.
x - y =1 } and finds the solution ( 1, 3 ). use substitution to explain whether angelica’s solution is correct.

Ineed me i stuck and i don’t want to get it wrong

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible