Thursday, February 2, 2012

I have extra credit due tommorow and i am soo confused. please help!?

so basically my teacher gave us one day to do extra credit and i have soo much for other classes so i decided rather than asking my dad to help which takes hours i think you guys can help! here are some of the problems...if you could explain them too. i dont just want the answer, i wanna learn too.



problem #1- a bus traveling 40 mi/h left freetown at noon. a car traveling at 60 mi/h left freetown at 1:30 p.m.

A. what time did the car catch up to the bus?

B. how many miles were the car and the bus from freetown when the car caught up with the bus?



problem #2- a student playing a computer chess game gets 5points when he wins a round and the computer gets 3 points everytime it wins a round. they play 64 rounds and end up with a tie score.

How many rounds did the computer win?



problem 3- a kite and its tail total 36 ft in length. the tail is 5 times the length of the body. how long is the kites tail?



problem 4- a painter places an 8.5-ft-long ladder against the wall. the bottom of the ladder is 4 ft, from the base of the wall. how high up the wall does the ladder reach?



problem 4- there are 27 white cubes assembled to form a large cube, the outside surface of the large cube is painted red. the large cube is the seperated into 27 smaller cubes.how many of the small cubes will have red paint on exactly the following number of faces?



a- three faces

b- two faces

c- one face

d- no face



thank you!!!!! please explainI have extra credit due tommorow and i am soo confused. please help!?
Distance of 1st bus: 40t

Distance of 2nd bus: 60(t - 1.5)



40t = 60(t - 1.5)



40t = 60t - 90



60t - 40t = 90



20t = 90



t = 90/20 = 4.5 hours



They will meet at 4:30. They will be 40(4.5) = 180 miles from Freetown.
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