The answer is option (B) i.e. The elevator traveled upward at a rate of
ft/sec.
So, we say at time, t = 0, the elevator just starts moving upwards and at time t = 0, the elevator is 90 ft below the ground.
Now, after 15 seconds, the elevator is 20 ft below the ground.
It means, the elevator has covered a distance of 90-20=70 ft in time 15 seconds.
So, speed of elevator moving upwards is:
=
ft/sec
Answer:
where I$ the question??
Step-by-step explanation:
where is it???
Answer:
Step-by-step explanation:
Well depends how old he was 2 years ago
But he would be 6 years older because 3 times as old as 2 equals 6
Use FOIL (First, Outside, Inside, Last)
x(x) = x²
x(9) = 9x
-2(x) = -2x
-2(9) = -18
x² + 9x - 2x - 18
simplify by combining like terms
x² + 9x - 2x - 18
x² + 7x - 18
x² + 7x - 18 is your answer
hope this helps