Write 500cm:1m in its lowest form

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.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

What is the value of x in the equation7x+2y=48 when y=3