Functions--> homework , absolutly stuck :S
Normally I wouldn't do this, but I recieved a tonne of htis functions stuff. I'm actually very efficient in completing the square to find zeros, but on these questions I recieved, I had 4 questions that, my answer wasn't/isn't going to match up with the ones in the book. There is one question on each page that I marked with a star (on the page) and I uploaded to photobucket. I'll copy out the questions here:
15. The base of a rectangle has a perimeter of 300m. The area of the base is 4400m^2. What are the dimensions.
17. The base of a triangle is 2 cm more than the height. The area of the triangle is 5 cm^2. Find the base to teh nearest 10th of a centimeter.
23. Two positive integers are in a ratio of 1:3. If their sum is added to their product, the result is 224. Find the integers.
24. Two whole numbers differ by 3. The sum of their squares is 89. What are the numbers?
As you can see, these questions are simple word problems, solved by completing the square. Let me know if you have any questions about my methods. I really hope to hear back PLENTY on this because it is simple stuff which seems to elude me (the answers at least.. The idea, I get) . I didn't post the answers in the book because I figured you guys could just tell me if I did anything wrong, but if you want the answer for a particular question, let me know. I'll be available a LOT this weekend, but the sooner hte better. Thanks in advance! (btw, I'm not asking one person to answer them all, so if you dont have time to go through all 4, could you just check one or two?)