I need to solve 4 of these:
1. If the reciprocal of x+1 is x-1, determine x.
2. In rectangle ABCD, AB = 4 cm and BC = 5 cm. Extend BD past D to E so that DE = BD. How long is AE?
3. A township's population increased from x thousand to x + y thousand. Find the percent of the population increase.
4. How many perfect squares are divisors of the product 1!*2!*3!*...*9!?
5. A merchant paid $30 for an article. He wishes to place a price tag on it so that he can offer a 10 percent discount on the price marked on the tag and still make a profit of 20 percent on the cost. What price should he mark on the tag?
6. Find two fractions that are evenly spaced between these two: (3/a) and (7/2a).
7. Find the ordered pair of numbers (x,y) for which 123x+321y = 345 and 321x+123y = 543.
8. For a given arithmetic sequence, the sum of the first fifty terms is 200, and the sum of the next fifty terms is 2700. What is the first term of the sequence? PLEASE HELP
2007-02-19
15:00:55
·
2 answers
·
asked by
Tammy V
2
in
Homework Help