Determine the values of the missing sides for the following triangle.​

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?

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

Proportions in triangles solve for x