The equation y = 15.5x represents the number of dollars, y, worker b earns in x hr.

which equation could represent the number of dollars earned by worker a?

y = 12x
y = 13x
y = 15x
y = 20x

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

52 cm radius = diameter = area = circumference = circumfer

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?