Question

Hello, I have a couple of questions on math. Can anyone help?

Answer 1

This is my first question, Two lines, A and B, are represented by the following equations:

Line A: 4x + 4y = 16
Line B: x + y = 4

Which statement is true about the solution to the set of equations?

Answer 2

ds nuts

Answer 3

Really man? Reported.

Answer 4

What are the statements?

Answer 5

No solution, It is (1, 2), it is (1, 5), and there are infinitely many solutions

Answer 6

Those are the answers they gave me.

Answer 7

Well the easiest way to go about this one is just to graph it, and you'll see which one it is really easily. If you don't have a calculator, just use: https://www.desmos.com/calculator

Answer 8

What do i use to graph it? A web tool or a paper?

Answer 9

Oh thats the graph

Answer 10

Just use the site I linked.

Answer 11

ok it looks like the lines are on top of one another

Answer 12

That means that they hit at every single point in existence. In other words, infinitely many solutions.

Answer 13

Oh ok

Answer 14

Are you willing to help me with y other questions?

Answer 15

Sure, just tag me and I'll come to help :)

Answer 16

Ok

Answer 17

Consider the following set of equations:

Equation A: y = 2x + 4
Equation B: y = 3x + 1

Which of the following is a step that can be used to find the solution to the set of equations?

Answer 18

2x + 4 = 3x
2x = 3x + 4
2x + 1 = 3x + 4
2x + 4 = 3x + 1

Answer 19

@LegendarySadist

Answer 20

The next question is the one above the tag

Answer 21

Which one do you think it is?

Answer 22

I think it is the second answer

Answer 23

It is not. I just graphed the two, found out where the x hit, and then solved which one met that x.

Answer 24

Ok let me graph it

Answer 25

Ok so i graphed it now what?

Answer 26

Find the x value of the point where they meet, and plug it into the options. Whichever gives you the y value of the point they meet is the answer.

Answer 27

Ok so the two lines intersect at (10, 3)

Answer 28

No, they meet at (3,10)

Answer 29

Oh

Answer 30

Ok @LegendarySadist i think its the first answer

Answer 31

Nope, you only get 10 on the first side. Try plugging them into the fourth option.

Answer 32

pfft ok i knew that >.<

Answer 33

ooh

Answer 34

Ok i got it

Answer 35

Ok @LegendarySadist i have my next question

Answer 36

Consider the following pair of equations:

y = x + 4
y = –2x – 2

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Answer 37

Just multiply the top so that the top x is equal to the bottom x.

Answer 38

ok so for example -2(x+4)-2

Answer 39

Like that?

Answer 40

THen i do the distributive property

Answer 41

Yeah, but you don't need the other -2 on the end of it. So -2(x+4) which will give you -2x-8. Then you just subtract the bottom from the top.

Answer 42

Oh

Answer 43

so then it would be -2x-8*4?

Answer 44

No. where did you get that *4 from? It would look like this