17. the total weight of a rock depends on its size and is proportional to its density. in this context, density is the weight per cubic inch. let w denote the weight of the rock in pounds, s the size of the rock in cubic inches, and d the density of the rock in pounds per cubic inch. if a 48-cubic-inch rock weighs w pounds, write an equation that shows the proportionality relation. a. d 48 w b. dw+48 48 c. d w 48 d. d 10w 48

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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:

hint: which coefficient is a multiple of 360°?

step-by-step explanation: