Show that cos (A+45) = cos45 (cosA-sinA)

In the right ∆ABC (m∠C = 90°) the acute angles are in the ratio 5:1, i. e. m∠BAC : m∠ABC = 5:1. If CH is the altitude to AB and CL is the angle bisector of ∠ACB, find m∠HCL.

Find the equivalent expression using the same basis (34•84) ^3

Which situation is linear? A. A sample of bacteria is doubting every day B. The number of cars each hour on a road for a week C. The cost of a movie ticket increases five percent each year D.

Factor: x2-xy+x-xy2+y3-y2

Does this set of ordered pairs represent a function? Why or why not? { (-2,2), (-1,2), (3,-1), (3, 1), (4,11) } A. No, because one x-value corresponds to two different y-values. B. Yes, because there are two x-values that are the same. C.

A person invested $13,000, part of the money, x, was placed in a stock that paid 9% annual interest. The rest of the money suffered a 5% loss. Express the total annual income from both investments, I, as a function of x.

What is the formula to find the the perimeter of 4 sided shape

Fulton is building a doghouse. He cuts 5 equal-sized pieces from a board that is 15 feet long. After cutting the pieces, he has 2 Which of these equations and expressions will, when solved or simplified, give the length of the 5 pieces of wood

The square of 9 less than a number is 3 less than the number. What is the number? a) - 12 or 7 b) - 12 or - 7 c) - 7 or 12 d) 7 or 12

Write an algebraic expression for " the minimum value of 2x + 1 is 13"