9,9,9,9,9,2 what's the mean

What is the solution y=3x-13 2x+4y=4

Jun collect stamps and baseball cards. He has 1,834 stamps and 1,286 baseball cards. Does he have more stamps or more cards? Explain.

A rectangular pyramid with a base of 3 meters by 10 meters and a height of 12 meters. A square pyramid with a base of 6 meters by 6 meters and a height of 11.5 meters.

Leons older brother is 4 3/4 feet tall. leon is 1/3 foot shorter. how tall is leon?

Housing prices in a certain neighborhood average at $113.81 per square foot. If one house in his neighborhood is 2100 square feet, what should it be? A. $239,000 B. $220,750 C. $140,000 D. $205,000

Jason buys sports equipment worth $80.00 and pays 5% sales tax. What is the total amount Jason pays including sales tax, for sports equipment?

I have an account balance of $200. I used my debit card to make a purchase of $350.25 how much money is in my account

Jason entered the elevator of the skyscraper on the ground floor and rode up to the 45th floor. Since Jason was texting, he didn't notice where he was, so he then rode down 28 floors and finally up 15 floors where he exited the elevator.

Randall bought a bond with a face value of $6000 and a coupon rate of 7.25%. the bond will mature in 5 years. how much interest will he receive semiannually?

Ryan has $0.75 worth of pennies and nickels. He has 3 more nickels than pennies. Determine the number of pennies and the number of nickels that Ryan has.