The amount you pay for a car is not usually the​ "sticker price," which may be the starting price. The price of a car was reduced by​ $300 from the sticker​ price, increased by​ $900 for additional​ features, and then reduced by​ $600 by the dealer. What integer represents the total change in price with respect to the sticker​ price? Use a number line to represent the change from the sticker price.

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

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

m∠a is 90°

m∠b is 40°