1.) a projectile launched straight up into the air with an initial velocity of 20 meters per second from a height of 10 meters. how long will it take for the projectile to hit the ground?
a.) which formula should be used?
h(t) = -4.9t² + vot + ho
h(t) = -16t² + vot + ho
b.) what is the vo?
c.) what is the ho?
d.) use the quadratic formula to solve

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2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6