A circular mirror is 21 inches in diameter. It has a 1-inch wide wooden frame. You want to cover the outer edge of the frame with a copper strip. How many inches of copper do you need? (middle school)

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

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )