Can anyone help with any? (asap please)

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?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?