Answer:
-50x^2+30x-4
Step-by-step explanation:
The maximum height is 144 feet.
The maximum height is the y-coordinate of the vertex. To find the vertex, we first use x = -b/2a. For our information, that is x=-64/2(-16) = -64/-32 = 2.
Now we substitute this into the equation:
y = -16(2²) + 64(2) + 80 = -64 + 128 + 80 = 144
Answer:

Step-by-step explanation:


15x+10x=12x+90; ⇔ 13x=90;

Answer:
y=3,6,9,12,15
Step-by-step explanation:
Y=3x+6
y=3(-1)+6
y=3
y=3(0)+6
y=6
y=3(1)+6
y=9
y=3(2)+6
y=12
y=3(3)+6
y=15