Jessica, Kelly, and Lori had a combined score of 50 points during a math competition. Jessica scored 10.1 points, and Kelly scored 22.2 points. How many points did Lori score? Check all that apply

17.7

Step-by-step explanation:

Jessica's points = 10.1

Kelly's points = 22.2

Lori's points = x

10.1 + 22.2 + x = 50

Add

32.3 + x = 50

Subtract 32.3 from both sides

x = 17.7

i believe the answer is the polygon, heptagon.

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