The length of the base of an isosceles triangle is x. The length of a leg is 3x - 3. The perimeter of the length is 71. Find x

8.222222222

Step-by-step explanation:

This question just means that the three sides of the isosceles triangle is 3x-3.

So it will be =3x-3+3x-3+3x-3

Firstly, you will collect like terms

Which will be =3x+3x+3x-3-3-3=9x-3

Secondly, it will be 9x-3=71

Thirdly, you will collect like terms =9x=71+3

=9x=74

Fourthly, you will divide both sides by 9

= 9x/9*74/9

=8.222222222 or 8.2 (Approximated)

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

i don't see any

step-by-step explanation: