If 12 people walk in a meeting and all of them shake hands how many handsshakes are there

Use an inverse matrix to solve the matrix equation.

Raul bought a soft drink and a sandwich for $9.90. Which is he price of each if the sandwich cost 3.5 times as much as the soft drink

2w ^ 2 + 6 = 5w How do I get rid of the square so I can combine the w's?

A new athletic shoe store had expenses of $40,000 for designing and building the shelves and counters and $120,000 for the first year's shoe inventory. So far this year, the shoe sales are $70,000.

The square root of 3111 to the power of 2

Hot dogs are $10 orange drinks or $20 checks are $25 and popcorn is $20. Austin bought two hotdogs and bag of popcorn and an orange juice. Austins bag and couch balance is $50. What was what would his balance be after paying all these expenses?

Solve the equation. 5y - 1 + y = 34 + 4y - 5y

Draw an angle BAC. Extend the sides AB and AC of the angle. Does this change the size of the angle?

Robyn ran 5 3/4 miles last week. She ran 4 1/10 this week. How many more miles did she run last week?

What are all the factors of 360?