Carla has a store that sell candles for 4 for 10 dollars. A customer called and Carla needs to know how much 20 candles would cost?

20 candles is 50 dollars

Step-by-step explanation:

set up a proportion. you know what 4 candles is. that's ten dollars.

4/10 = 20/x

x will be your placeholder for the cost, because we don't know how much 20 candles is. now, make sure everything is lined up, obviously it'll be different on here. I'll post a picture of the work at the bottom.

take 4 and cross multiply it to X. that's 4x. then you'll take 10 and multiply it by 20. mental math, that gives you 200. so, now you've got a one step equation of 4x=200.

take 4 divide it into 200, and you get 50. hope this helps!!

5.5

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: