Sigma n=1 to infinity of cos n*pi/2

Y = x + 2 y = 3x - 4

Find the dimensions of a rectangular prism whose volume is (x^4 - y ^4) units3.

Which expression is equivalent to - 36 - 8-36-8minus, 36, minus, 8?

How many angles does a nonagon have?

A square pyramid has a heighth and a base with side length b. The side lengths of the base increase by 50%. Write a simplified expression that represents the volume of the new pyramid in terms of b and h. An expression is

Apply the law of syllogism to write a new statement based on the following: A → B: If it rains, then football practice will be canceled. B → C: If football practice is canceled, then Patrick will go to the cinema.

If tan 0 = - 3/8 which expression is equivalent to cot0?

How many lines of symmetry does the letter R have?

N//4 = 18/72, what is n

Given a triangle with angles of 23, 90, 67, what type of triangle is it: acute, equiangular, obtuse, or right?