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MAVERICK [17]
3 years ago
5

Kath starts with a number. she adds 3 to her number then double the result. finally, she subtracts 7. if she ended with 9, what

number did she start with?
Mathematics
1 answer:
Dimas [21]3 years ago
4 0
The answer is 5. Work backwards: first add 7 to 9, then divide by 2, then subtract 3.

9+7=16
16/2=8
8-3=5

Cross Check:
5+3=8
8*2=16
16-7=9

Final Answer: 5
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Answer:

See below.

Step-by-step explanation:

For each day number, Y means working, and N means off

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1   Y

2   Y

3   Y

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5   N

6   N

7   N

8   Y

9   Y

10   Y

11   Y

12   N

13   N

14   N

15   Y

16   Y

17   Y

18   N

19   N

20   N

21   N

22   Y

23   Y

24   Y

25   Y

26   N

27   N

28   N

29   Y

30   Y

31   Y

32   N

33   N

34   N

35   N

36   Y

37   Y

38   Y

39   Y

40   N

41   N

42   N

43   Y

44   Y

45   Y

46   N

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