Solve for X

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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?

If f(x)=x/2-3 and g(x)=4x^2+x-4, find (f+g)(x)

What is the equation of the line that is parallel to the given line and passes through the point (−3, 2)? 3x − 4y = −17 3x − 4y = −20 4x + 3y = −2 4x + 3y = −6