Answer:
Step-by-step explanation:
it is maximum.
when leading coefficient of x² is negative,
It is downward parabola.
or
y=-2x²+10x+1
=-2(x²-5x+(-5/2)²-(-5/2)²)+1
=-2(x-5/2)²+2×25/4+1
=-2(x-5/2)²+25/2+1
=-2(x-5/2)²+27/2
maximum value of y is 27/2 and is attained at x=5/2
vertex is (5/2,27/2)
Speed = distance/time
So speed = 40/10
= 4m/s
23 is 40 degrees
because it’s vertical to angle AOF and when two angels r vertical, they r equal
Answer:
75ft
Step-by-step explanation: