Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

Determine whether the given value is a solution of the equation. 8w = 99; w = 12

What's 132,654 rounded to the nearest thousand

What whole number comes after 59

Hot air balloons generally descend at a rate of 200 to 400 feet per minute. Four balloons descend 295 feet per minute for 7 minutes. Find the total change in altitude for all 4 balloons.

If a triangle has an angle measurement of 85 degrees and another angle of 75 degrees, what is the measurement of the third angle? What type of triangle is it?

Hourses a clydesdale drinks about 120 gallons of water every 4 days at this rate, about how many gallons if water dies the clydesdale drink in 28 days?

Jessica is printing invitations to a graduation party. She needs to print 250 invitations one per sheet of paper. She was only able to purchase 5 packages of 25 sheets of paper at the store.

Jacob painted 30% of a banner. luis painted an equal amount of the same banner. the rest of the banner remains unpainted. write a fraction to describe the amount of banner that remains unpainted?

What is the answer for -4^2 (negative 4 with exponent of 2) and (-4) ^2 (in parentheses negative 4, then when parenthesis close, it says exponent of 2)

If I have 25 marbles and I have to divide them for 25 people how much will that be