Look at these sets of ordered pairs. W)(8,9),(2,3),(0,-2),(10,-9)
X) (0,0),(5,10),(-3,3)
Y) 1(1,1),(2,2),(3,3,),(4,4)
Z)(-10,1),(-9,3),(-4,5)
Which of the sets represent functions?
A. W, Z
B. X, Y, Z
C. W, X
D. W, X, Y, Z

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?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.