Ayudenme pprfa son dos la azul es una y la blanca es otra​

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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 rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.