Question

the distance of a car from a certain intersection after t seconds is given by d(t)=14+4t-t^2.when(that is,for which values of t) it the car 14 units away from the refrence point ?
A.t=0
B.t=2
C.t=4
D.t=6
E.never

Answer 1

@hartnn

Answer 2

can anyone help??

Answer 3

d (t) = 14 +4t - t^2 = 14

solve for t

Answer 4

would it be t=4?

Answer 5

-> 4t - t^2 = 0

can u solve this for t?

Answer 6

so it would be A

Answer 7

thats one value - but theres another one

Answer 8

ok , so what would it be ?

Answer 9

t(4 - t)= 0

t = 0 or t = ?

Answer 10

t could be 0 but 4 - t could be zero also

Answer 11

so it would be A and C

Answer 12

yes

Answer 13

ok can u help with some more ?

Answer 14

Which of the following are solutions to the equation below
7x^2+35x-252=0
A.4
B.-7
C.-4
D.252
E.-9
F.9