Batman is 4 times robins age . the sum of their ages is equal to 45. how old is batman and robin?

What does it mean by solve the exponential equation for x?

How many different triangles can be constructed with the angle measurements of 134° 10° and 36° ?

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.