The difference of two binomials is a binomial

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

Multiply. write your answer in simplest form. 3/8 x 5/7

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?