in the diagram of circle a, what is the measure of ∠xyz?

35°
70°
75°
140°

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

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