Sharon tried to solve an equation step by step.
\qquad\begin{aligned} 9& =-3(e-2) \\ 9& =-3e+6& \green{\text{step } 1} \\ 15& =3e& \blue{\text{step } 2} \\ 5& =e& \purple{\text{step } 3} \end{aligned}
9
9
15
5


=−3(e−2)
=−3e+6
=3e
=e


step 1
step 2
step 3


find sharon's mistake.

40 is the final : )

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

answer

step-by-step explanation: