A moon cake with two egg yolks cost $2more than a mooncake with one egg yolk. The cost of 6 mooncakes with two egg yolks and 5 mooncakes with one egg yolks and 5 mooncakes with one egg yolk is $130.80 find the cost of a mooncake with two egg yolks.

The cost of one mooncake with two egg yolks is $ 12.80.

Step-by-step explanation:

pls mark brainliest

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

ummm seems that u didnt post the attachement !