Answer:
first do:
60mph * 4 hours= 240mi
Let D = the distance the passenger train has to
travel to catch the freight train
Start a stopwatch when the passenger train leaves
Let t = the time on the stopwatch when they meet
Equation for freight train:
d-240=60t
Equation for passenger train:
d=100t
all together:
100t-240=60t
we can do 100t-60t because they both have (t)= 40t
40t=240 *now divide 240 by 40= 6
THEN do:
D= 100mph x 6= 600mi
They will meet 600 mi from the station
to check:
d-240=60t x 6
600-240= 360
60 x 6= 360
360=360
The correct answer would be B.6 and 7
For the given equation, either 3x + 7 = 0 or x + 7 = 0
Now,
or
So, possible values of x is : -7 and -7/3
In slope-intercept form, the line's equation is
y = -2x + 3
Adding 2x to the equation gives you ...
c) 2x + y = 3