Evaluate the expression using an appropriate double angle formula ... cos^2 (15) - sin^2 (15)

The graph shows the relationship between the mber of hours Angie works and the amount of money she earns. Is there a proportional relationship between the number of hours Angie works and the amount of money she earns? Explain.

Which statement best describes how to determine whether f (x) = 9 - 4x2 is an odd function? Determine whether 9 - 4 (-x) 2 is equivalent to 9 - 4x2. Determine whether 9 - 4 (-x2) is equivalent to 9 + 4x2.

An ice company charged $3.40 for 4 bags of ice. if a convenience store bought 6 bags of ice how much would it have cost them?

The graph below shows two normal distributions. 2 normal distributions are shown. One peaks at 30 and the other peaks at 45. What is the difference of the means of the distributions? 15 30 45 60

What is the greatest common factor of 12 and 30? 2 3 6 12

7. Find the slope of the line through (-2,6) & (3,14).

Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute and Gear Q makes 40 revolutions per minute.

A triangle with vertices (0, 1), (4, 1), and (1, 5) is reflected across the x-axis. What are the new vertices of the reflected triangle?

Using only whole numbers Nikki wrote as many multiplication equations as she could with 12 as the product what where her equations

The price of an item is $12.25. You give the cashier a $10 and a $5 bill. What is the change?