What is the value of y in y = log_64 64?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

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?