How to solve this:
what fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from:
1) 12 'o clock to 6 'o clock
2) 3 'o clock to 6 'o clock
3) 1 'o clock to 4 'o clock
4) 5 'o clock to 11 'o clock

What is the volume of this square pyramid?

Solve the system of equations. y= 2x y= x^2 - 15

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.