Rewrite m+3n=7 to solve for m

For which rational expression is -2 an excluded value of x?

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?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost