Simplify the expression by using a double-angle formula. - 2cos2π91

How do you solve this problem? What is a rewritten form of the radical (-8/726) It is supposed to be a squar root sign instead of a slash

Scott found a rare comic book on an online auction site priced at 35 Australian dollars. If the exchange rate is $1 U. S=$1.09 Australian, find the cost of the comic book in United States dollars. Round to the nearest cent

Factor 15a + 21b. Group of answer choices 3 (15a + 21b) 3 (5a + 7b) 3ab (5 + 7) 36ab

What is the formula for rhombuss peritmeter?

N circle o, radius oq measures 9 inches and arc pq measures 6π inches. what is the measure, in radians, of central angle poq? 2pi/3 radians 3pi/4 centimeters 4pi/3 radians 3pi/2 radians

The system of equations x = y - 1 y + 4 = x + 6 has how many solutions.

Solve this inequality: 3 (x + 6) - 2 (x + 2) > (or equal to) 10

Is 4/5 greater than 1/3

Martha always tries to exercise at least 30 minutes a day. Write an inequality to represent the number of minutes Martha exercises each day.

A swimming pool has perimeter of 72 feet. The short sides measure 16 feet. What is the length of the longer sides of the pool