If y varies directly with x and y = 21 when x = 3, find y if x = 5. First, find the direct variation equation. y = [ ? ] x​

when y = 21, x = 3

when y and x vary directly, that means there is something that you multipy x that gets you to y.

to solve for this number, you divide y by x.

21= 3=7

this means to go from x to y, you multiply x by 7.

7x = y

we can use this to solve for x when y = 42

7x = 42

divide both sides by 7

X = 6

when y = 42, x = 6

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

x=0

step-by-step explanation: