Atriangle has side lengths measuring 2x + 2 ft, x + 3 ft, and n ft.

which expression represents the possible values of n, in feet? express your answer in simplest terms.

a. x – 1 < n < 3x + 5
b. n = 3x + 5
c. n = x – 1
d. 3x + 5 < n < x – 1

sin3a=12/15

step-by-step explanation:

since one side was multiplied by 3 the other side must also be multiplied by 3.

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