Which sum or difference identity could be used to prove that sin (pie + q) = - sin q

Given two angles in each triangle, how can you determine if two triangles are similar?

Find the sum of the first 100 terms of the arithmetic sequence with the first term 2 and the common difference 5.

What is 25% of what number is 13?

Reduce the fraction W^2+5w+6/w^2-w-12? A.-5v^2/12t^2u^2 B. 5y^2/12t^2u^2 C. - 5t^2v^2/12u^2 D. 5t^2v^2/12u^2

Using the graphing method, which of the following choices is the solution of system: 3y = x-9 y = - x + 1

Mr. Williams owns a stable in the countryside. He created the expression below to represent the number of horses at the stable t years after he began boarding horses. Which statement below best describes the coefficient, 30? A.

The probability of drawing three jacks in a row from a standard deck of cards when the drawn card is not returned to the deck each time is

Car a leaves the grand canyon at noon. it travels at 60 mph, but stops at 3 pm for an hour. car b leaves the grand canyon at 2 pm and travels at 70 mph without stopping on the same route as car a. when does car b catch up with car a

If nine is X percent of 45, what is X percent of 5

How do you prove two circles are similar