Can anyone help me with this quiz please?

Hello everyone. I could really use a little help on this quiz that is in progress right now. Thanks for you help

1. Find the indicated value for the given rational expression R(u)=8u^2-1/u^2-u-6, R(2)
2. David hires a septic system contractor to dig trenches for his septic tank. The cost to hire the contractor is a fixed cost of $200 plus an additional $60 per hour. what is the average cost of an x-hour job?
3. Find the least common multiple of the given terms 5b^3, 6b
4. Build the rational expression. p-2/p+3=?/p^2-p-12
5. find lowest common denominator. 3x^2/15y3, 2/14x^2yy^2, 5y/20x^3
6. least common multiple 3x^2y^2, 9xy^3
7. reduce to lowest terms -9x^2-24x-16/(3x+4)^2
8. reduce to lowest terms 8-2x/-4x-6
9. reduce to lowest terms 3x^2+7x+2/4x^2-16
10. perform indicated operations and write in lowest terms 3r-7s/7 / 9r^2-42rs+49s^2/56
11. a car used 32 liters of gas to travel 184 kilometers. How many liters of gas will be used to travel 460 kilometers?
12. an inlet pipe can fill a pool in 12 hours, while an outlet pipe can emptry it in 15 hours. If both pipes are left open, how long will it take to fill the pool?
13. One painter can paint a house in 40 hours while another painter can paint an identical house in 35hours. How long would it take them to paint a third, identical house if they work together.
 
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