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 balloon x hours after startijg its ascent from the hill can be modeled by the function -16x^2+64x+80. does the parabola open up or down? identify the x and y intercepts

900 degrees

step-by-step explanation:

55% are girls and 45% are boys : ) hope this

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is