Which equation results from adding the equations in this system? −2x+y5x−y==8−5

7x=13

7x=3

3x=3

3x=13

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

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?