To prepare for a party, mark buys a small bunch of balloons for $6.00 and a gift that costs $5.15 each. He spends a total of $72.95 on the balloons and gift bag for each person invited to the party. Wrote and solve an equation to find the x, the number of people mark invited to the party.

b

step-by-step explanation:

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

but which class are u may know that first