Ihave to solve this question! 15 points here is a test for all of you a> if items a + b = $ 25 b> and items b + a + c = $46 c> and items b + b + b = $30 d> and item a = $ 15 what is item c ? find the answer by using only two of the lettered lines. ex: " you can find the answer by using lines a> and b> and doing this with them." said the unknown sranger typing an answer.

your answer would be b

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional