## Search found 8 matches

Sun Jan 01, 2012 3:45 am
Forum: Beginning Algebra
Topic: question!! i think this is algebra...
Replies: 3
Views: 2678

### Re:

jamie had x dollars in the bank. he took out 1/2 of it. then he took out 1/3 of the remaining sum to get something else. what fraction of the original amount remained in his account? i did 1-(1/2-1/3) Does the exercise say that "then he took one-third of the original sum", or that "then he took one...
Sat Dec 31, 2011 9:02 am
Forum: Beginning Algebra
Topic: 1st term is 50; each sub. is 1/2 prev. term if even, else...
Replies: 1
Views: 1323

### 1st term is 50; each sub. is 1/2 prev. term if even, else...

The first term in a series of numbers is 50. Each subsequent term is 1/2 the term before it if it was even. or 1/2 rounded up to the next whole number if it is odd. What is the 3rd number in this sequence? a)13 b)24 c)30 d)40 i dont get this. so, the second number is 45, and the third is 1/2 x 45= 2...
Sat Dec 31, 2011 8:59 am
Forum: Beginning Algebra
Topic: 1/4 of students failed final exam; of rest, 1/3 scored A
Replies: 2
Views: 1917

### 1/4 of students failed final exam; of rest, 1/3 scored A

In Mr. Joe's class, 1/4 of the students failed the final exam. Of the remaining class, 1/3 scored an A. What fraction of the class passed but didnt get an A? a)1/4 b)5/12 c)1/2 d)7/12 i got c) because I made the teacher have 100 kids, and 1/4 = 25 failed. then 75 (remaining) x 1/3= 25 got an A. The ...
Sat Dec 31, 2011 8:53 am
Forum: Beginning Algebra
Topic: Quantative Reasoning: p^2+q^2=25, 2pq=10, find (p-q)^2
Replies: 1
Views: 4880

### Quantative Reasoning: p^2+q^2=25, 2pq=10, find (p-q)^2

if p2+q2= 25 and 2pq=10, what is (p-q)2?

a)250
b)100
c)50
d) 5

i dont get this...the answer is b) and i guessed c).
i only know that pq=5 and possible values for the p and q in p2+q2= 25 are p=4 and q=3 or vice versa.
Sat Dec 31, 2011 8:49 am
Forum: Pre-Algebra
Topic: chumway motors discounts the car cost by 10% and then...
Replies: 1
Views: 2088

### chumway motors discounts the car cost by 10% and then...

chumway motors discounts the car cost by 10% and then it takes off 20% of the new price. What discount does this represent from the original price of the car? a) 28% b) 30% c) 40% d) 72% i got d) because i set a fake price(\$1000)...and then did the 10%(new price: \$900) discount and then the 20%(np: ...
Sat Dec 31, 2011 8:45 am
Forum: Beginning Algebra
Topic: question!! i think this is algebra...
Replies: 3
Views: 2678

### question!! i think this is algebra...

jamie had x dollars in the bank. he took out 1/2 of it. then he took out 1/3 of the remaining sum to get something else. what fraction of the original amount remained in his account? a)1/6 b)1/5 c)1/4 d)1/3 ummm so i did 1-(1/2-1/3) which i got 1/6...a) my answer sheet says d) (this is from a isee t...
Thu Dec 15, 2011 5:53 pm
Forum: Beginning Algebra
Topic: finding restrictions: 4a^2-b^2-2a+b / (2a+b)^2-1
Replies: 1
Views: 2041

### finding restrictions: 4a^2-b^2-2a+b / (2a+b)^2-1

ok i understand how to solve the problem, but i dont get how to get the restrictions. i have to solve this problem and then put restrictions on it 4a^2-b^2-2a+b / (2a+b)^2-1 the answer is 2a+b / 2a+b+1 but on my answer sheet the restrictions also says b is not equal to 1-2a and -(2a+1) my teacher al...
Sat Oct 29, 2011 7:46 pm
Forum: Beginning Algebra
Topic: factoring trinomials: factor xy2+ 2xy- 3x-y2+2y-1
Replies: 1
Views: 2153