What is the slove system of linear equation by elimination of x+y=2 and 2x+7y=9

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

M. xyz =radians. covert this radian measure to its equivalent measure in degrees.