The variables y and x have a proportional relationship, and y = 28 when x = 21. What is the value of x when y = 42
x=114
x =18
x= 313
x = 56

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2