H(x)=-0.5x^2+10x+20

What is a word problem that can be for this equation

And what are the: x and y values, x and y intercepts, the vertex, and domain and range?

The average human heart beats 72 beats per minute. how many times does it beat in 15 seconds?

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.