What is the value of y? Sides are 18, 10, 10+2x , and 2y+4

y=6

Step-by-step explanation:

18=10=10+2x. 18-10-10=2x. -2/2=2x/2=-1. 10+2(-1). 10-2+4=2y. 12=2y=6

13

step-by-step explanation:

distance formula is d=√(x2-x1)^2   +   (y2-y1)^2

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