The simultaneous equations are
2x - 7y = 4 (1)
3x + y = -17 (2)
Write (2) as
y = - 3x - 17 (3)
Substitute (3) into (1).
2x - 7(-3x - 17) = 4
2x + 21x + 119 = 4
23x = -115
x = -5
This is the equation obtained after substituting y from the second equation into the first equation.
The solution for y is
y = -3(-5) - 17 = -2
Answer: x = -5
Note: The solution is x = -5, y = -2.
D 10” riser , 7-1/2 treas
They are both Parallelograms, they both are 4 sided with the opposite being parallel
Answer:
the answer is = 18
Step-by-step explanation:
Should be 3 hrs. when the second train leaves,it is 60 miles away from the first train and the speed difference is 80-60=20MPH, so it takes 60/20 hrs to catch up
