Question

Which ordered pair is the solution to the system of equations? -3x+4y=-20 x+4y=-4



A.
(8, 1)

B.
(−12, 2)

C.
(−4, −8)

D.
(4, −2)

Answer 1

if x=a, y=b, then the ordered pair(a,b) is the solution of the system if the LHS equals the RHS

Answer 2

im really bad at math

Answer 3

less technical saying is that take you first number of your ordered pair, substitue all x with this number, do the smae thing on y with the second number, now compute your left side of equations, if it equals the right side, you found the solution

Answer 4

huh?

Answer 5

so your first choice is (8,1) which means you should go change every x to 8 and every y to 1

Answer 6

mk

Answer 7

now what's your equation look like?

Answer 8

so the LHS of yor first equation used to be -3x+4, now its -3*8+4 which is -20

Answer 9

-8x+1y=-20 8x+1y=-4

Answer 10

-3x+4y, sorry

Answer 11

nonono

Answer 12

change your x's and y's not your constants

Answer 13

-8x+1y

Answer 14

why do you do that?!

Answer 15

x=8 and y=1, so if you have x, change it to 8, you have y change to 1

Answer 16

sry -8+1=

Answer 17

did you figure out how to do it ?

Answer 18

no i dont understand anything to do with math besides adding subtracting and multiplication and division everything else i suck at.

Answer 19

ok, start from basics, what does (8,1) stand for?

Answer 20

idk

Answer 21

it means x=8 and y=1

Answer 22

the x and y axis?

Answer 23

(a,b) means x=a and y=b

Answer 24

ok

Answer 25

geometircally yes, but you can just say algebraically, without talking about the coordinate plane which makes things easier cuz you are not doing geometry now

Answer 26

i kno im doing pre-algibra

Answer 27

next, what it the solution to a equation or a system of equations

Answer 28

what?

Answer 29

they teach algebra in pre-algebra, this doesnt een make sense

Answer 30

i have a very slow brain

Answer 31

so sometimes i dont make sense

Answer 32

for an ordered pair (a,b) to be a system of equations, x=a and y=b MUST hold true for both equations

Answer 33

in your example -3x+4y=-20, x+4y=-4

Answer 34

say order pair (a,b) is the solution of equation, -3a+4b=20 AND a+4bb=-4 MUST BOTH be true

Answer 35

therefore (1,1) is NOT a solution since -3*1+4 is not -20

Answer 36

understand better?

Answer 37

im sorry no

Answer 38

what are you failing at? now I tried my best, if you still dont understand, you need to tell me where EXACTLY you are not understanding

Answer 39

ok so im not understanding any of it i kno you try you best you might as well just quit because i cant understand math

Answer 40

one last round, ok

Answer 41

go for it

Answer 42

so far so goo?

Answer 43

okay