Challenge problems:
find the values of x and y, assuming that the lines are parallel.
1
4x°/(6x + y)
/(x + 5y)

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

40 describe the outliers from the scatter plot.

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?