Please help

don't get this stuff

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?