Find the distance between each pair of parallel lines
Please I really need help

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36