Brian says that 8n+2=82 when n=1 explain why he is incorrect

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 solution on the interval [0, 2pi)

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation.