What type of number best describes the diameter of a circle

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

What are the excluded values? m+5/mn+3m

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?