7. a linear transformation t : r3 ? r2 first performs a horizontal shear that transform e2 into e2-2e1 (leaving ei unchanged) and then reflects points through the line x2 =-n. find the standard matrix of t.

Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x. a. tanx=2 b. sinx=2 c. tanx=1/2 d. sinx=1/2

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

What is fraction that is equivalent to 3/8