What’s the value of x ?

John can eat 10 cookies in 1/2 hr how many cookies can he eat in 45 minutes make a proportion and solve

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?

For what values of x is x2 + 2x = 24 true?