What is the probability a day in the 70s is a Monday?

Which set forms the intersection of Tuesdays in the 80s?

What is the probability an observation picked at random is both a Sunday and more than 90 degrees?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?