Algebra help?

Question

If y = 4 when x = 12, find y when x = -24

Answer 1

all you have to do is make a ratio:

x 12 -24
-- ------ = ------
y 4 x

now cross multiply:


12x= -96

divide by 12 on each side

12x= -96
-------------
12 12


then you get:

x= -8

voila!!

Answer 2

4

Answer 3

If Y= 4, X = 12, Y= 1/3 X (twelve divided by four) so if X = 24 Y= 1/3 of 24 or 8

Answer 4

4 * -24 / 12 = -8

Answer 5

If y=4 when x=12, x/y =3 Therfore -24/3=8 y=-8

Answer 6

You need to figure out what needs to happen to x to change it from 12 to -24. That would be multiplying it by -2. Now do the same thing to y and you get -8.

Answer 7

As above mentioned, you can not calculate that unless more information is provided because there are infinitive values of Y that satisfy that relation.
Everybody has presumed, excepting two people that y=x/3. Why not y= (x+4)^1/2, which satisfies the first relation but it gives you an imaginary number for x=-24.
Y will be -8 ONLY and ALWAYS that the relation were Lineal. For any other relation non lineal the possible values of Y will be infinitive.

So your question must start with: Suposing that the relation between y and x is lineal,...........................

Answer 8

if x = 12, y = 4
if x = 1, y = 4/12 = 1/3
if x = -24, y =-24/3 = -8

Answer 9

y=-4

Answer 10

Easy
Y=-8