Potatoes are on sale at both grocery mart and baldwin hills market. at grocery mart a 5 lb. bag of potatoes cost $2.85 and at baldwin hills market a 7 lb. bag of potatoes cost $4.20. which store offers the best deal on potatoes? how much better of a deal?

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

How to do this , and can some one explain

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?