Question

medals.
How many solutions exist for the system of equations? (Use the graphing calculator tool to help solve the problem.)

3x – 4y = 10

2y = x – 5

one solution: (0, –2.5)
one solution: (0, 2.5)
no solution
infinite number of solutions

Which is the best approximate solution to the linear system? (Use the graphing calculator tool to graph the system. Round to the nearest tenth.)

x – y = 2

y = 2x + 3

(–2.6, –3.3)
(–2.6, 3.3)
(–0.7, –2.3)
(–0.7, –2.4)

Answer 1

@k_lynn

Answer 2

ok, use that graphing calculator I gave you to make the lines. I'll make the lines,too.

Answer 3

ok

Answer 4

Here are the graphed lines. Do they intersect?

Answer 5

sorry i used the last equation for this question again lol

Answer 6

Yes they do.

Answer 7

Right. And what point do they intersect at?

Answer 8

wait, I'm sorry I used the wrong equation. Let me graph them again.

Answer 9

Lol, it ok.

Answer 10

Ok, those are the right ones. Do those lines intersect?

Answer 11

yes indeed.

Answer 12

Correct. At what point do they intersect?

Answer 13

around 2.5 or something like that.

Answer 14

the coordinates that they intersect at are (0,-2.25) So that means that those equations have a solution. So what is that solution?

Answer 15

which equation are you on

Answer 16

the first one.

Answer 17

the 3x-4y=10 one

Answer 18

we just did that one, im sorry, ive entered the same one.

Answer 19

oops...let me graph the other one then.

Answer 20

Here is the graphed lines. Do they intersect?

Answer 21

yes!

Answer 22

Ok, at what points?

Answer 23

-0.7

Answer 24

I think I did something wrong. The point at which they intersect at isn't an option in your question.

Answer 25

I"m kind of lost on this. maybe @iGreen or @Conqueror can help you.

Answer 26

okay, thanks trhough