One printing machine-printed 1800 books in 60 hours this week. A second printing machine printed for 40 hours this week but printed books at twice the hourly rate of the first machine. How many books did the second machine print this week? 2,400

3,600

1,860

1,200

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?