Question

If you could help me with number 7-9 that would be nice if not it’s ok .

Answer 1

7) We know that there are 4 boys and 12 girls in Mr Jhonson's club and there are 6 boys in Ms Greene's cub.

To know the number of girls in Ms Greene's club we must solve for x the next equation

`\begin{gathered} (4)/(12)=(6)/(x) \\ 4x=12\cdot6 \\ x=(72)/(4)=18. \end{gathered}`

So, there are 18 girls in Ms Greene's club.

8) We know that the temperature decrease by 12°C.

So, if the original temperature was 12°C the final temperature is represented by

`\begin{gathered} \text{ FinalTemperature=temperature at 12:00 - 12\degree{}C} \\ \text{ FinalTemperature=12\degree{}C-12\degree{}C} \end{gathered}`

Finally, the answer is letter A.

9) To know the anwer we must solve 7/12

`(7)/(12)=0.58333333`

as the last number is repeated infinite times, we must write the answer as a periodic decimal.

Finally, the aswer si

`0.58\bar{3}`

So, the answer is letter B