Asubmarine dove 35 feet per hour for 7 hours. how deep is the submarine if it originally started at 107 feet below sea level?

Could somebody me with this radical simplification?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers?

Which of these statements is correct? the system of linear equations 6x - 5y = 8 and 12x - 10y = 16 has no solution. the system of linear equations 7x + 2y = 6 and 14x + 4y = 16 has an infinite number of solutions. the system of linear equations 8x - 3y = 10 and 16x - 6y = 22 has no solution. the system of linear equations 9x + 6y = 14 and 18x + 12y = 26 has an infinite number of solutions.