The variables x and y vary directly. Use the given values to write an equation that relates x and y.
x = 20
y = 10
a.
y = x squared
c.
y = one-half x
b.
y = one-third x
d.
y = 2 x

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units