(7+i)-(3+4i) I’m supposed to simply the expression

Chanelle deposits $7,500 into the bank. she does not withdraw or deposit money for 6 years. she earns 6% interest during that time. what will the balance be when she is finally able to withdraw her money?

Write each fraction as an equivalent fraction with a denominator of 120then write the original fractions in order from samllest to largest

Asap! i'm not good math and i'm lost.