Replace ∗ with a monomial so that the expression can be rewritten as a square of a sum or a difference:
∗ +56a+49
please explain

Plz hurry evaluate the expression a+b where a=8 and b=19

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?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.