you are practicing your skills at building a house of cards. the world record for the tallest free standing house of cards is over 25 feet high! use the picture of the house of cards shown to answer the questions that follow.
how can you find the number of cards needed for any row number?
justify your answer.

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. the arena wants the probability of being shortlisted to be 0.14. what is this as a percentage and a fraction? what is the probability of not being shortlisted? give your answer as a decimal. those shortlisted are entered into a final game of chance. there are six balls in a bag (2 blue balls, 2 green balls and 2 golden balls). to win, a company needs to take out two golden balls. the first ball is not replaced. what is the probability of any company winning advertising space on their volley ball team jerseys?

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?

Solve the system of equations. y=3x-1 and y=-2x+9. show work