What is the unit cost per napkin if its 15 in a pack for 3.90

9514 1404 393

  $0.26

Step-by-step explanation:

To find cost per napkin, divide the cost by the number of napkins:

  cost/napkin = $3.90/(15 napkins) = $0.26/napkin

answer for #1 is c

answer for #2 is d

can i get 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