Answer:
Step-by-step explanation:
Remark
I hope you don't mind if I laughed a little at the graph. The y intercept of the line is at 10 dollars, but the rental car has not moved an inch. I guess they're charging you to look at your driver's license. It's late, and maybe I am a little giddy.
Begin by using a ruler (or some other straight edge) to join all the dots.
a) I'll spend a little time here. It is very important that you know how to read a chart and this question is your first step. The question is how many dollars does it take to go 40 miles? There is a system. Start with the 40 miles on the horizontal axis (x axis if you know that that is).
Use a ruler to go straight up until you hit the line.
- When you hit the line, mark the place.
- Now move straight across until you hit the y axis where you find out the money.
- You should get 30 dollars.
b) This question is a guess.
- You can find the 70 dollars easily enough. Go straight up again until you hit the line.
- Mark the point on the line.
- Go straight across again.
- Not so easy. It isn't marked. You have to make a guess. My guess is 45. What do you think?
c) This question is the exact reverse of the other two.
- This time you start with the amount of money
- So you start at 60 dollars and go straight across until you hit the line.
- Mark the point.
- Now take your ruler and go straight down.
- You should hit 100 miles.
7 x 1 = 7
5 x 3 = 15
20 x 1 = 20
So, the number that belongs in the green box is 2.
answer:
x = 0.80
y = 1.50
step-by-step explanation:
x = cost of tacos
y = cost of burritos
both equations:
3x + 2y = 5.40
2x + 1y = 3.10
^
turn this | into this |
v
y = 3.10 - 2x
then add it to the equation :
3x + 2 [ 3.10 - 2x ] = 5.40
3x + 6.2 - 4x = 5.40
-1x = - 0.8
x= 0.80
then add x = 0.80 to the equations to get :
3 [ 0.80 ] + 2y = 5.40
2.4 + 2y = 5.40
2y = 3
y = 1.5
