Answer:
13
Step-by-step explanation:

Dividing both sides by 7, we have

So we will begin with the equation for any slope
it is
(y2 - y1)/(x2 - x1)
and we will put each given point in its place
(-8-(-1)) / (t -(0))
then sum up the nominator
-1 = (-7) / t -0
and to find t we have to divide -7 over -1 and add -0 which will give us 7
So the value of t is 7
Answer:
A
Step-by-step explanation:
using the rule of exponents
•
×
⇔
, hence
× 7² =
= 
Answer:
90/1.5=60 mph
Step-by-step explanation:
I assume that the train is traveling at constant speed.
Between 12:45 pm and 2:15 pm the train has traveled 180-90=90 miles. So 90 miles in 1.5 hours which means that its speed is 90/1.5=60 mph