10x+3y=43
-9x-y=-20
From second equation,
y=-9x+20
Substitute third equation into first equation,
10x+3(-9x+20)=43
10x-27x+60=43
-17x=43-60
-17x=-17
x=1
y= -9+20= 11
Option B
Answer: x=2
Step-by-step explanation:
What you do is you plug the y equation on top and you substitute it in for the y on the equation below. You have -3x=-2(-5x+8)-10
Answer:
1.05 miles per hour
Step-by-step explanation:
m = y2 - y1/ x2 - x1 (It doesn't matter which you choose to be y2 and y1, just make it consistent)
m = 4.2 - 2.1/ 4 - 2
m = 2.1 / 2
m = 1.05
Answer:
30 minutes
Step-by-step explanation:
2 hours = 120 minutes
120 divided by 4=30
