25/t + 6 = 2t + 1
solve the equation from there
(1- 6)
25/t = 2t + -5
25/t x 2t = -5
50t = -5
t = -1/10
Answer:
48
Step-by-step explanation: 4x8=32 2x8=16 32+16=48 :)
1 and 1/3----------Hope I helped....
Answer:
one
Step-by-step explanation:
there are no equal variables
The equation is s=144t - 16t², s being the distance and V=144 ft/s
a)The maximum (or minimum) is reached when the derivative of s = 0
s' = 144 - 32t = 0 and t= 9/2 or 4.5 second (time needed to reach the max
Now plug t= 4.5 in the original equation and you will find s = 324 ft
(Why it's a max and not a minimum: because 2nd derivative is negative and equals s" = -32)
b) Velocity of the ball: distance (up) s=320 ft, time that means:
320 =144t - 16t² (solve for x) -16t²+144t-320 = 0, t₁ =4 and t₂ =5 (t₂ is not valid since max time to reach summit is 4.5) so t =4s , distance = 320. so the velocity at 320ft is 320/4 = 80 ft/s
c) Due to the symmetry of the parabola, the velocity at 320 ft on its way down = 80 ft/s
