1) Write as a single interval if possible: (3, ∞)∪[11, ∞)
2) Professor Dutuit gives only a mid-term exam and a final exam. The semester average is computed by taking of the mid-term exam score plus of the final exam score. To get a C, Max must have a semester average between 70 and 79 inclusive. If Max scored 100 on the mid-term exam, what range of scores on the final exam would give him a C ? Show your work.
3) The formulas
r = 0.07t + 2.27
and
w = 0.08t + 2.48
give an approximate model for the yearly average price r of a bushel of rye and w of a bushel of wheat over the past five years, where t is the number of years since 1994. What is the first year in which the price of rye exceeded $2.48/bu and the price of wheat exceeded $2.56/bu?
4) Audrey has 32 dimes and quarters in her piggy bank with a total value of $6.50. How many of the coins are dimes and how many are quarters?
thank you soooo much!!!! I appreciate all that help me with this! It's gibberish to me. :-)
2007-09-30 01:47:41 · 4 answers · asked by Vonnie 2 in Science & Mathematics ➔ Mathematics
10 points for whoever answers them and shows work!!! Thank you for your help.
No more stupid comments please. I don't have time for that mess. If you just want yahoo answers points, find someone else to waste time on.
2007-09-30 03:05:15 · update #1
Why do you say its gibberish? Math is just thinking logically. Just learn to think logically and life becomes much more understandable...
anyway....for example with (4), without any math knowledge at all, here's how you can do it. You have 32 coins in all. OK, try 32 dimes = $3.20, not enough. OK, try 32 quarters = $8.00, too much (but closer). OK, try 12 dimes and 20 quarters = $6.20. Very close! OK, try 11 dimes and 21 quarters = $6.35. Even closer! OK, try 10 dimes and 22 quarters = $6.50. Bingo!
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2007-09-30 01:55:52 · answer #1 · answered by tsr21 6 · 0⤊ 0⤋
You're asking us to do your homework for you? You've got to be kidding me. Seriously, you won't learn this way. Meet with your teacher to go over these questions. They're ludicrously easy, you should be able to understand them in no time. That's a lot better than getting screwed over later because you don't know how to solve two variable problems.
2007-09-30 08:51:19 · answer #2 · answered by Henry 2 · 1⤊ 1⤋
I answer questions which ask for solution of only one problem.
2007-09-30 09:21:46 · answer #3 · answered by Anonymous · 0⤊ 1⤋
(3, â)
40 - 44.5
2007-09-30 08:53:28 · answer #4 · answered by gjmb1960 7 · 0⤊ 0⤋