Select all that apply. which of the following are proportions? a. 25/10 = 5/2 b. 3/4 = 8/10 c. 2/8 = 3/12 d. 3/4 = 15/20

a)

cross multiply.

(25)(2) = (10)(5)

50 = 50; this is true

b)

cross multiply.

(3)(10) = (4)(8)

30 = 32; this is not true

c)

cross multiply.

(2)(12) = (8)(3)

24 = 24; this is true

d)

cross multiply.

(3)(20) = (4)(15)

60 = 60; this is true

a, c, and d are proportions.

i cant see the graph

step-by-step explanation: