HELP ME!!

The square of the sum of seven times a number and

seven

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.