Suppose y1 and y2 have correlation coefficient ρ = 0.2. what is the value of the correlation coefficient between 1 + 2y1 and 3 + 4y2

Multiply. −2x(6x4−7x2+x−5) express the answer in standard form. enter your answer in the box.

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?

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm2. what is the area of the second triangle?