Question

What is the x-intercept of the line with the equation http://static.k12.com/bank_packages/files/media/mathml_babbcfbef5289e45dd0930b9fa63f095bca3e267_1.gif?



( , 0)

Answer 1

@iambatman plz help me

Answer 2

To find the x intercept, set y = 0, and solve for x.

Answer 3

btw my computer is messed up so might take a bit to reply

Answer 4

No worries, take your time :)

Answer 5

don't need to bother you but how do you solve for x?

Answer 6

No, no you should bother me haha!
so you have: \[\frac{ 1 }{ 3 }x+y=-15\] we want the x - intercept so to do this we start off by setting y = 0.
\[\frac{ 1 }{ 3 }x+0=-15 \implies \frac{ 1 }{ 3 }x=-15\] and you can see the x is "stuck" onto the 1/3 meaning it's being multiplied and we want to get rid of it on the left side, and move it to the right, so in these sorts of questions we will use the opposite operation to do that. So do you have any idea how we can move the 1/3?

Answer 7

we could turn it into a decimal a divide it by -15?

Answer 8

You could do that, but it's better to leave it as a fraction, you should try getting into the habit of using fractions, as they will be everywhere! But what you want to do is, multiply both side by 3, so you have you can see the 3's cancel each other out.

Answer 9

Does that make sense?

Answer 10

yes I got -45

Answer 11

Yup!

Answer 12

So you have the coordinates (-45,0)

Answer 13

can you help with more? And thanks

Answer 14

If you need help just open up another question, and if not me, someone else will come around and help you :)!