3.8b-7 + -2.9b+9 add the two expressions

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Abcd is a square. what is the measure of angle bac

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?