Which system of equations has infinitely many solutions? A
4x+2y=8

4x−2y=8

B
4x−2y=8

−4x+2y=−8
C
4x+2y=8

4x+2y=10

D
4x+2y=8

−4x−2y=−10

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?

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x