1a) What fraction of her party guests are cousins? * Andrea invites some of her relatives to a party.
She invites: 12 cousins
6 aunts
4 brothers
2 sisters

1/2

Step-by-step explanation:

12 + 6 = 18

18 + 4 + 2 = 24

12/24 = 1/2

1/2 of her party guests are cousins.

Hope this helps!

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

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: