On a windy morning, a hot air balloon starts ascending and flying away from the top of the hill. The altitude, h, in feet, of the ballon x hours after starting its ascent from the hill can be modeled by the function h(x) = -16x^2 + 64x+ 80 Does the parabola open up or down?
Identify the value of the y-intercept.

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2xdesmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x