Simplify. Write "undefined" for expressions that are undefined. I don't understand it, can someone help?

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.