by BlasianAsian » Fri Mar 22, 2013 10:52 am
Hello all!
Just got some last minute questions before districts regarding calculator. Any and all help will be appreciated. Thank you very much!
12A-28. Daria has 25 coins totaling $2.41. She has twice as many dimes as pennies, and one less nickel than quarters. How many nickels and dimes does she have?
Answer: 15 INTEGER
I assume that there is some way of solving this very quickly without having to write down the equations, substitute, plug in, etc. Can one use matrices for this?
2012-2013 SG:
I am aware that a thread for this has already been created, but it doesn't have all of the problems that I'm having trouble with.
11D-38. Mike and Mary stand unmoving 24 feet apart. Ned stands 18 feet from Mike and 8 feet from Mary, forming a scalene triangle. What is the shortest distance Ned can move to create a right triangle?
Answer: 4.93 FEET
11E-26. Harvey in a city wants to arrange a meeting with Mike in another city which is 95 miles north, and also with Harry who lives in yet another city, 167 miles due east. If the meeting site selected was yet another city which is equidistant from all three towns, how far does each person travel?
Answer: 9.61e1 miles
11F-37. A kid used a clothes pin to attach a playing card to a spoke on the front wheel of his bike. Once every wheel rotation, the card "clicked" when it struck the bike frame yoke. If the front wheel has an 18-in diameter, what is the bike velocity when clicks are 1/4 s apart?
Answer: 1.29e1 MPH
12H-37. A chair was caught up in a tornado, rotating around a 1500 feet circumference with a speed of 110 mph. After picking up the chair, the tornado traveled 5 miles at 35 mph before dissipating. How far did the chair travel?
Answer: 2.07e1 MILES
Thank you!
Num Sense: -320
Calculator: -140
Math: -120
Science: -69696969696969