Simplify the expression by using a double-angle formula or a half-angle formula.

7cos^2 (theta/9) - 7sin^2 (theta/9)

sin (theta/6) cos (theta/6)

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score?

Use substitution to solve the system - 5x+2y=20 and x=3y-17

During a certain 11-year period, the Consumer Price Index (CPI) increased by 55%, but during the next 11-year period, it increased by only 15%. Which of these conditions must have existed during the second 11-year period? A. Stagnation B.

18 students in a sixth grade have brown hair. These students represent 3/4 of the class. How many students are in the class?

I am trying to solve a equation by completing the square the problem is m^2+7m-294=0

The solution to 4.2x = 19.32 is x = ___. 0.28 0.45 4.6 15.12

Richard has a rectangular plot of land that is 525 feet long and y feet wide. He decides to build a fence around the plot. If the perimeter of the plot is 1,504 feet, find the value of y

A circle is defined by the equation: x^2 + y^2 - x - 2y - 11/4 = 0. Determine the coordinates for the center of the circle and the length of the radius.

The auto insurance plans available from Fret-No-More Auto Insurance are outlined in the table below. To be considered "full" coverage, an insurance plan must include one level of coverage from each category.

All types of work are covered by a minimum wage. True False