Kathy starts with a number. she adds 3 to her number then doubles the result. finally she subtract 7. if she ended with 9 what number did she start with?

if she has 9, add 7. you have 16. divide it by half, 8. subtract 3 and you get 5.

The number she started with is 5

5 + 3 = 8

8 x 2 = 16

16 - 7 = 9

Hope this helps

y/x=18

step-by-step explanation:

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.