How to solve these math problems

Sigchi4life
Category:
Other
Price: $5 USD

Question description

1.the ratios of teachers;male students;female students in a school are 2;17;18.
The total number of STUDENTS is 665.
Find the number of teachers.

2. Work out as a single fraction:
2/x-3 - 1/x+4

3.p is the largest prime number between 50 and 100
q is the smallest number between 50 and 100
calculate the value of p-q

4. A cyclist left Melbourne on Wensday 21th may at 9;45 to travel to sydney. the journey took 97 hours. write down the day, date, and time the cyclist arrived in sydney.

5. solve the simultaneous equation
2x+y/2=7 2x-y/2=17


I will really appreciate it if you can answer at least any of these questions. 
Thank you 

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