I need help with these questions first to help gets brainliest

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?

Find the value of x in the diagram below. select the best answer from the choices provided