Step-by-step explanation:
-Twice means muliply by 2
-The difference of a number and 7 means subtract a number/variable and 7.
-Is equal to 9 means =9
2(X - 7) = 9
The answer is 10 2/3 because 3/4 equals .75. 8 divided by .75 equals 10 2/3
Answer:
5/9
Step-by-step explanation:
4+5=9 and there are 5 boys
Answer:
20%
Step-by-step explanation:
If you see they say that the number decreased is 10% each and they say it two times. we could see that the missing number is as big as the length of two 10% together, so if you add them two you get 20%.