Question

Which ordered pair is a solution to the equation 4x + 7y = –5?

A.
(–4, –3)

B.
(–4, 3)

C.
(4, –3)

D.
(4, 3)

Answer 1

get it so that y=mx+b first

Answer 2

so you would get 7y=4x-5 then divide both sides by 7 to get y=(4/7)x-(5/7)

Answer 3

so the answers b?

Answer 4

There's no need to do anything to the equation.
Just plug in each pair into the equation and see which ordered pair makes the equation true.

Answer 5

i'm having a hard time choosing between b and c

Answer 6

4x + 7y = -5

Try A. (-4, -3)
Is 4(-4) + 7(-3) equal to -5?
-16 - 21 = -37.
-37 is not equal to -5, so choice A is not it.

Now do the same with the other choices until one of them works.

Answer 7

alright

Answer 8

sorry, i had to leave for a short time.... but if you did get in y=mx+b form, you could just start at (-5/7) then go up 4 and to the right 7

Answer 9

but yeah the other way is easier...

Answer 10

alright

Answer 11

Joey fixes bicycles and charges a shop fee of $15 and $10 per hour for time worked. If t is the number of hours worked and C is the total charge for completed work, then the variables are related by the equation
C = 10t + 15.

Which variable is the independent variable?

A.
There is no relationship between the variables.

B.
C

C.
t

Answer 12

c

Answer 13

an independent variable is a variable which can be assigned any permissible value without any restriction imposed by any other variable.

Answer 14

thank you very much :)

Answer 15

or you could just say that it is the variable in the equation. and no problem!

Answer 16

you're awesome :D

Answer 17

lol thanks

Answer 18

:)