change 4/10 into fifths

Find the result when 6n + 9 is subtracted ftin 2n - (6n + )

Prove (cosx+cosy) ^2 + (sinx-siny) ^2 = 2+2cos (x+y)

If 8 = x and x = y, then 8 = y is an example of which algebraic property?. A) Symmetric Property. B) Transitive Property. C) Reflexive Property. D) Commutative Property of Multiplication.

A gift box is 6 in long, 3 in wide, and 3 in tall. How much paper is needed to wrap the box? (assuming the box is wrapped with the minimum paper and no overlapping)

If the gcf of two numbers of 1 they are called era

Express the area of each figure as a monomial. Solve 7x^4 if the formula is s^2.

A chess board is an 8 by 8 grid of squares. If you randomly choose 3 squares on the board, what is the probability that: a) they lie on the same line, excluding diagonal lines? b) they lie on the same line. including diagonal lines?

A marble bag contained 2 red marbles, 3 blue marbles, and 5 yellow marbles. Marco drew a blue marble and did not replace it. What is the probability of drawing a blue marble next?

An 85-foot rope from the top of a tree house to the ground forms a 45 degree angle of elevation from the ground. How high is the top of the tree house?

Find the area of an equilateral triangle with an apothem of 7