Domain and ramge graph… i need help

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.