5is the result of 12 more than 3/4 of some number. what is the number?

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

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?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0