PLEASE HELP IM TAKING A TEST!! The graph of the relationship of number of dinners and cost is a line that contains the points (2,12), (4,24), (6,36) and (8,48). What is the constant of proportionality?

i am not putting 20 points on this anymore

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?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Ten times the square of a non-zero number is eqaul to ninety times the number