9 cm 12 cm Which of the following equations could be used to find the area of the rhombus? What is the area of the rhombus?​

Find the missing part. use an improper fraction for your answer.

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.

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?