Question

What are the intercepts of 3x-9y=-27 ?

Answer 1

@jigglypuff314

Answer 2

-9

Answer 3

x-intercept is when y = 0
y-intercept is when x = 0

so to find the x intercept
plug in 0 for y
to get 3x - 9(0) = -27 and solve :)

then to find the y intercept
plug in 0 for x
to get 3(0) - 9y = -27 and solve :)

Answer 4

The x and y intercepts of just the y intercept?

Answer 5

@tHe_FiZiCx99 it appears to be a linear equation
and is asking for plural "intercepts"

Answer 6

so combine them ? it'd equal zero right
0-0=-27

Answer 7

not quite :)
don't combine them, solve them separately

3x - 9(0) = -27 and solve by itself


3(0) - 9y = -27 and solve by itself

Answer 8

3x- 9(0)=-27
3x- 0= -27

2(0)- 9y=-27
0 - 9y=-27

Answer 9

yep :) and you can continue

3x- 0= -27 simplifies to
3x = -27 then divide both sides by 3


0 - 9y=-27 simplifies to
-9y = -27 then divide both sides by negative 9

Answer 10

-9/3=-3 ?
-9/-9=1

Answer 11

mmm

3x = -27 then divide both sides by 3 means
/3 /3
so x = -27/3 = ?


-9y = -27 then divide both sides by negative 9 means
/-9 /-9
so y = 27/9 = ?

both are still separate

Answer 12

x=-9
y=3

Answer 13

yep! :)

Answer 14

there has to be 2 sets of paired number ?

Answer 15

so like

x-intercept is when y = 0 makes x = -9
ordered pairs are like (x, y)
so you get (-9, 0)

then you would do the same for the y = 3 part
y-intercept is when x = 0 makes y = 3
ordered pairs are like (x, y)
so you get (0, 3)

Answer 16

Ohh ok so what about this one?
What are the intercepts of x + 5y =10

Answer 17

same idea :)
to get x-intercept plug in y = 0
so x + 5(0) = 10 and simplify

Answer 18

x+0= 10

Answer 19

and x+0 = just x
so you can take the 0 out to simplify
so you get x = ?

Answer 20

1?

Answer 21

errr 10 says 10
so x = 10

I was talking about the x+0
^ part before.

so since x-intercept is when y = 0 and we got that x = 10
and ordered pairs are like (x, y)
how about you give it a try? :3

Answer 22

so it'd be 10,0 0,2 ?

Answer 23

correct! :)

Answer 24

Hey check this one out .
Rachel can buy licorice sticks for $0.075 and cerry candies for $0.50 and has a budget of $25 . If her expense are represented by the equation 0.75x+0.5y=25, where x is the number of licorice sticks and y is the number of cherry candies, how many cherry candies can she buy if she wishes to spend the enitre $25 on cherry candies? \[Note: x \ge 0, y \ge 0\], and x and y take only integer values.)

Answer 25

my guess is that you divide 25 by 0.5 right ?

Answer 26

yep! :)

Answer 27

ythanks can you give me a medal ? (:

Answer 28

lol ;)