briana needs at least $680 to buy a new puppy. she has already save $400. she earns $8 an hour at her job. write and solve an inequality to find how many hours she will need to work to buy the puppy.

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?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)