Mabel worked 6 hours yesterday and 0.57 hour
today. How many hours total did she work?

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

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.