Someone plz help me plz someone

What is the area of the triangle 10 13 12

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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