Question

Solve the system using matrices. 3x + 4y = 18 3x + 4y = 18 A. (-2, 6) B. (-2, -6) C. (6, -2) D. No solution

Answer 1

you posted the same equation twice

Answer 2

I didn't notice

Answer 3

is that a typo?

Answer 4

or does it really list 3x + 4y = 18 twice?

Answer 5

no it's listed once

Answer 6

what is the other equation

Answer 7

This is the problem.
Solve the system using matrices. 3x + 4y = 18 3x + 4y = 18 A. (-2, 6) B. (-2, -6) C. (6, -2) D. No solution

Answer 8

I know, but what are the two equations

Answer 9

I have no Idea I don't seem to understand the question

Answer 10

one of the equations is 3x+4y = 18

what is the other one?

Answer 11

if both equations are 3x + 4y = 18, then you'd get infinitely many solutions

Answer 12

It is like this in the page 3x + 4y = 18 3x + 4y = 18

Answer 13

then there's a typo

Answer 14

I would bring it up with the teacher and see what s/he says

Answer 15

It's no solution

Answer 16

no actually quite the opposite: there are infinitely many solutions

that's if the system is 3x + 4y = 18 3x + 4y = 18

Answer 17

ok

Answer 18

so that's why I think it's a typo and the second equation should be something else

Answer 19

Do you know this one
Solve the system of equations by the addition method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent. -4x - 3y = 6 -20x - 15y = 30

A. No solution, inconsistent

B. (-24, -18)

C. (-18, -24)

D. Infinitely many solutions, dependent

Answer 20

notice how if you multiplied everything in equation 1 by 5, you get equation 2

this means that the two equations are effectively the same

Answer 21

so this means the system is dependent and there are infinitely many solutions

Answer 22

Ok thanks :)

Answer 23

yw

Answer 24

How do you work this problem out am not good in math at all but I have to pass this class and I have been in it for 1 year and couple of months

Answer 25

just keep practicing and you'll get better

Answer 26

and try to translate everything to something you understand

Answer 27

math is like a language: you have to practice it everyday and you have to keep using it

also you have to translate things to something you're already comfortable with and build from there

Answer 28

am almost done wit this class this is the only one am missing to finish thank God

Answer 29

well even though you'll be done, you should still keep practicing because math will be used in the workplace (most likely)

Answer 30

since it's an online class it's hard for me to understand

Answer 31

yeah online class is tough because you don't have a teacher to ask questions

Answer 32

the books online don't help me understand how to get the answer

Answer 33

yeap that's true

Answer 34

yeah that's another thing that's usually cryptic: textbooks

Answer 35

yeah

Answer 36

I got this one wrong I put B can u help me?

Solve the equation for y. 7x - 3y = 4

A. y = x +

B. y = 7x - 4

C. y = x +

D. y = x -

Answer 37

ok one sec

Answer 38

And I got this one wrong too

Solve the equation for y. 7x - 3y = 4

A. y = x +

B. y = 7x - 4

C. y = x +

D. y = x -

Answer 39

nothing pasted properly, but that's ok

Answer 40

\[\large 7x - 3y = 4\]


\[\large -3y = 4-7x\]


\[\large -3y = -7x + 4\]


\[\large y = \frac{-7x + 4}{-3}\]


\[\large y = \frac{-7x}{-3} + \frac{4}{-3}\]


\[\large y = \frac{7}{3}x - \frac{4}{3}\]

Answer 41

So the answer is D?

Answer 42

I mean C?

Answer 43

I can't tell because like I said, things didn't paste properly

Answer 44

look at what you pasted to see what I'm talking about

Answer 45

Oh ok

Answer 46

A. y= x+
B. y= 7x -4
C. y=x +
D. y= x -

Answer 47

That's the answers to choose I had choose B n got it wrong

Answer 48

again, it's not pasting properly

post a screenshot instead

Answer 49

how do I do a screenshot?

Answer 50

hit printscreen

open up MS Paint

paste it in

save it, then post it

Answer 51

printscreen is the key around the insert, home, page up keys

Answer 52

Ok

Answer 53

Cant find it I guess cause it's a online class

Answer 54

it's a key on your keyboard

Answer 55

OK found it

Answer 56

so I high light the question n then press printscreen?

Answer 57

no just hit printscreen

then you open up MS Paint and paste

Answer 58

ok

Answer 59

printscreen just copies the entire screen that you see and it shares it with whoever

Answer 60

were is MS paint?

Answer 61

found it

Answer 62

my laptop says paint alone

Answer 63

ah yeah paint works

Answer 64

hmm very weird, it's not showing up there either

Answer 65

still the same thing

Answer 66

you'll have to contact a teacher about this

it looks like there are some serious flaws with it

Answer 67

the answer choices aren't even fully written out

Answer 68

ok

Answer 69

seems like its common for typos (really bad ones) to show up on this system

Answer 70

thank for ur help

Answer 71

sure thing

Answer 72

can u help me with this one?
Decide whether the ordered pair is a solution of the given system.

(-1, 6)
x + y = 7 x - y = -5

A. Yes

B. No

Answer 73

x + y = 7

-1 + 6 = 7 ... plug in x = -1 and y = 6

5 = 7

since that last equation is FALSE, this means that (-1,6) is NOT a solution to x+y = 7

Answer 74

so (-1,6) is NOT a solution to the entire system

Answer 75

thanks

Answer 76

Perform the indicated operation.