A washer and a dryer cost $750 combined. The cost of the washer is two times the cost of the dryer. wats the cost of the dryer

The washer costs $500.

Step-by-step explanation:

w + d = 750   (cost of washer plus cost of dryer is $750)

w = 2d  (washer costs two times the cost of the dryer)

Since you cannot solve an equation with two variables (letters), use the second equation to replace the "w" in the first equation with "2d".

2d + d = 750

3d = 750

Divide both sides by 3:  d = 250

Now that you know the dryer costs $250, plug that number into the first equation:  w + 250 = 750.

Subtract 250 from both sides:  w = 500.  The washer costs $500.

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.

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: