1. what is the relationship of sine and cosine where one angle is Φ another is 90 and the third one is 90-Φ 2. prove that ㏑(x^n)/㏑(x)=n

13 points and brainliest to the best answer

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

16x^2-16x=5 solve the equation by completing the square