The dinner at a hotel is priced at $10 for chicken and $15 for steak. If there are 40 meals served on Friday night, and the total revenue for the night is 5470, how many steak dinners were purchased?

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Me n o w. i need t h i s. 10 points