2. If a projectile is launched straight up from ground level with an initial velocity of 96 ft per sec. Its height in feet, s. after t seconds is given by the equation
S = -16t? + 96t.
a) At what time(s) will it reach a height of 80 ft?
b) After how many seconds will it return to the ground?

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3

c

step-by-step explanation:

the answer is b because it has ^2 and the rest do not.

step-by-step explanation: