What do you call a parallelogram that is both a rhombus and a rectangle?

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

Landon wrote that 3−2.6=4. which statement about his answer is true?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?