1.what is the simplified form of the following expression? 7m^2+6.5n-4n+2.5m^2-n a. 9.5m^2+1.5n b. 4.5m^2+1.5n c. 1.5m^2-4.2n d. 9.5m^2-1.5n 2.simplify the following expression 1/4(16-12x) a.4+3x b.4-3x c.4+3 d.4-3 3.what is the sum? 7/3+(-3/8) a.65/24 b.47/24 c.-4/5 d.-5/4

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

For which pair of functions is (gof)(a)=|a|-2?

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?