Question

Systems of Equations! Please help!

Answer 1

you have
y=x+4
3y=-2x+2
you can multiply the 1sr equation by 2 and add them up
2y=2x+8
3y=-2x+2
---------
5y=0+10 -> y=10/5=2 then you pick an equation and substitute y by 2
the 1st equation becomes (2)=x+4 -> x=-2

Answer 2

what is it?

Answer 3

I'm going to put everything in pieces. Here's the question, and I'll put up the choices right after.

Answer 4

I always get confused with this type of word problems, better you get help from someone else

Answer 5

Okay. Thanks for trying anyways dude. ^-^

Answer 6

x + y = 7 ---> x = -y + 7
y intercept is 7
x intercept is 7
slope is -1

3y = 2x + 6
y = 2/3x + 2
y intercept is 2
x intercept is : -3
slope is 2/3

It is the third graph

Answer 7

O: You're smart, if I do say myself! Thank you! ^.^

Answer 8

no problem :)

Answer 9

I have a few more questions, although I'm sure you guys might not want to help me. :/

Answer 10

-2x + y = 3

-4x + 2y = 6 -- reduce
-2x + y = 3

same equation, same line....overlapping lines

Answer 11

You really are smart... you did that fast!

Answer 12

y = x + 3
sub in x + 3 for y in the other equation
2x + y = 9
2x + x + 3 = 9
3x + 3 = 9
3x = 9 - 3
3x = 6
x = 2
now sub 2 in for x in either of the original equations to find y
y = x + 3
y = 2 + 3
y = 5
solution is (2,5)

Answer 13

Whoa... I can't thank you enough!

Answer 14

2x = 5y + 4 --> 2x - 5y = 4
3x - 2y = -16

2x - 5y = 4 -->(-3)
3x - 2y = -16 -->(2)
----------------
-6x + 15y = -12 (result of multiplying by -3)
6x - 4y = - 32 (result of multiplying by 2)
---------------add
11y = - 44
y = -4
now sub -4 in for y
2x - 5y = 4
2x - 5(-4) = 4
2x + 20 = 4
2x = 4 - 20
2x = -16
x = -8
solution is (-8,-4)

Answer 15

You're amazing at this.

Answer 16

x + y = 5
y = -x + 5

y intercept is 5
x intercept is 5

It is line joining points whose x and y coordinates add up to 10

Answer 17

15x - 2 = 3^x

I do not really know the proper way to do this, so I am just gonna sub in your answer choices to see which one is correct.

15(1) - 12 = 3^1
15 - 12 = 3
3 = 3 (correct)

answer is : x = 1

Answer 18

thanks for the testimonial :)

Answer 19

Oh, no problem. You're very helpful!

Answer 20

@thisisausername ...got more questions ?

Answer 21

Yes ma'am. ^-^

Answer 22

I am sorry..I do not know this one :(

Answer 23

That's fine. ^-^ Let me get the next question ready for you.

Answer 24

10x + 8y <= 40
8y <= -10x + 40
y <= -10/8x + 40/8
y <= - 5/4x + 5

y intercept is 5
x intercept is 4
less then means shading below the line

graph is 3rd graph

Answer 25

You are absurdly good at this.

Answer 26

I am sorry but I have to get off now....I have to go somewhere. I will be back on later. I will finish this last one....give me a sec

Answer 27

Okay.

Answer 28

-3x - 5y < 1
-5y < 3x + 1
y > 3/5x - 1/5

y int is -1/5
x int is -1/3
slope is 3/5
(>) greater then means shading above the line

answer is : -3x - 5y < 1
sorry it took so long....I am gonna go now, I will be back on later. Hope I helped :)

Answer 29

Adios. And it helped a lot. Thank you. :)

Answer 30

YW :)