Question

Which equation has one solution?

Answer 1

@Unanimoose

Answer 2

i think its a

Answer 3

it will have one solution if they have different slopes

Answer 4

does the first equation have a different slope?

Answer 5

expand and check

Answer 6

I'm really confused, can you show me how to do it?

Answer 7

oh ok sec

Answer 8

so the first example

Answer 9

4(x+9)
you have to multiply every term by 4

Answer 10

4*x+4*9
4x+36

Answer 11

so a) is giving you the same equation twice,

Answer 12

this means there are an infinite places these 2 lines meet, as they are the same line on top of each other

Answer 13

so a is out.

Answer 14

ok what about b?

Answer 15

exapand b, what do you get

Answer 16

4(x+9)=13x-36
^----- what did we say we can do to the left side

Answer 17

idk

Answer 18

expand the brackets