7/8 divided by 3/4 simplest form

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Write the equation in logarithmic form m^x=n

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?