Number of results: 8
How do i solve the following equations giving the answers either exactly or to 3 significant figures? a)3x + 5 = 2x – 1 b)(x^2 + 9) / 2 = 10 c)x^2 = 4 (x – 1) d)2^x = 5 e)3^x+1 = 7 What do you not understand about thse euqations. They seem pretty simple. Please be dtailed.
Monday, August 13, 2007 at 5:39pm by kat
Can someone explain how to do this: There are 100 boys , 80 girls, and 20 teachers. Out of these, how many ways can 2 girls, 2 boys and 1 teacher (all together in a group of 5) be chosen?
Tuesday, August 19, 2008 at 4:44am by Rebekah
How many ways can 2 girls be chosen from 80? n = 80 r = 2 C(n,r) = n!/[r!(n-r)!] = 80!/[2!(78!)] 80*79/2 = 3160 then 2 boys from 100 100*99/2 = 4950 then 1 teacher from 20 is obviously 20 I now have 3160 groups of girls, 4950 groups of boys and 20 groups of teachers. The ways ...
Tuesday, August 19, 2008 at 4:44am by Damon
a combination lock has three dials, each numbered from 1-9. each combination consists of 3 digits, one from each dial. how many different combinations are possible? please help me i tried this for 10 mins i cant figure it out. thanks
Wednesday, August 5, 2009 at 6:11am by Julia Ten
What is wrong with 9*9*9 ?
Wednesday, August 5, 2009 at 6:11am by bobpursley
what do you mean whats wrong with it?... are you saying thats how to figure out the answer? so 9 multiplied by 9 multiplied by 9?
Wednesday, August 5, 2009 at 6:11am by julia ten
Raoul wants to create a weekly schedule for going to the gym. He wants to go to the gym the same three days each week, and he wants there to be at least one day in between each of his visits. How many different ways can Raoul schedule his weekly gym visits?
Monday, April 29, 2013 at 8:48pm by Anonymous
One day between gives us ... Sunday, Tuesday, Thursday, Saturday, Monday .... but that does not result in the same three days each week. I don't understand the question.
Monday, April 29, 2013 at 8:48pm by Reiny