In a bag there are 7 red marbles, 10 green marbles, 8 blue marbles, and 11 purple marbles. What is the
theoretical probability of randomly pulling a blue marble out of the bag?

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

What is the lcm of 16 and 40 ? 24 and 40 ?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?