Which is a solution to the equation y = 2x – 5?

A.
(5, –5)

B.
(3, 11)

C.
(2, 1)

D.
(1, –3)

Question

Which is a solution to the equation y = 2x – 5?
 
 A.
(5, –5)
 
 B.
(3, 11)
 
 C.
(2, 1)
 
 D.
(1, –3)

bowtie_man123 · Answer

Thanks and i cant remember how to do this would you be able to give me an explanation?

eli_moses · Answer

ok
so basically i just simplified the coordinates into the equation for x and y

bowtie_man123 · Answer

OHHHHHHHHHHHH ok thanks

eli_moses · Answer

|dw:1425594844050:dw|

eli_moses · Answer

you can simplify it from there

tkhunny · Answer

It is a substitution problem.

You have this: y = 2x – 5
For part A, you have this: (5, –5) ==> Substitute x = 5 and y = -5
Thus: y = 2x – 5 ==> -5 = 2(5) - 5 OR -5 = 10-5 OR -5 = 5
That last result clearly is incorrect, so you are done.  (5,-5) is NOT a solution.

bowtie_man123 · Answer

what about this one Which is not a solution to the equation   ?
 
 A.
(–4, –7)
 
 B.
(3, 14)
 
 C.
(2, –1)
 
 D.
(1, 8)

eli_moses · Answer

is it the same equation?

tkhunny · Answer

It is EXACTLY the same.  Show YOUR work.  Do NOT post any more problems with no work shown.