ahh so I was right on the Smith one, lol thanks Limey!
Okay for those of you who are still up to helpin me out, here are 6 more questions, then I SWARE I'm done after this, haha.
And I have looked at all the problems, & usually I'm good with this stuff but I suck at these worksheets esp. when we had a sub the day we got them, ack! Okay, here goes...
1. Bill can paint a closet in 2 hours. Bob can paint the same closet in 3 hours. How long will it take them to paint the closet working together? (I'm guessing 1 hour, or an hour & a half?)
2. Paul can mow the grass in 50 minutes, but it takes Dan three times as long. How long will it take them to mow the grass if they work together?
3. Using 1 drain, a swimming pool can be emptied in 45 minutes. Using a different drain, the job requires 1 hour and 15 minutes. How long will it take if both drains are opened?
4. One pipe can fill a tank in 4 hours. A second pipe also requires 4 hours, but a third needs three hours. How long will it take to fill the tank if all three pipes are open?
5. From 6ab-2ac+5bc, take 10ab-2bc+3ac
6. Find the perimeter of a rectangle if its length is (4c+7) units and its width is (c-3) units.
7. David has 11 coins, some quarters and some dimes. If the coins have a value of $1.55, how many of each kind are there?
The last two are from the other worksheet, couldn't figure those out either.
lol I bet I will be the only one in my class with both worksheets fully done, haha no one else in my class had a clue how to do these either.
Thanks guys!