# Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

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 Question 315163: I need help with this equation below. 1. Find the least common multiple (LCM)of (7+6u),(49-36u^2) and (7-6u) Click here to see answer by Alan3354(34674)

 Question 315337: Solve the equations and check your solutions. If there is no solutions, say so... 1/x+2/3x=1/3 5/4x+2=1/x Click here to see answer by Edwin McCravy(9716)

 Question 315516: A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched from the top of a tower that is 120 meters and the initial speed is 50 meters per second, what will its height be after 4 seconds rounded to the nearest tenth? Click here to see answer by nyc_function(2741)

 Question 315508: I AM TRYING TO FIND THE ANSWER TO THIS IN SCIENTIFC NOTATION AND AM NOT SURE I UNDERSTAND HOW TO FIGURE IT CAN YOU HELP? The mass of Mercury is about 3.302*10^20 metric tons. The sun is about 1.998*10^27 metric tons. About how many times the mass of Mercury is the mass of the sun? The answer is supposed to be in scientific notation rounded to the nearest thousandth Click here to see answer by CharlesG2(828)

 Question 315589: simplify: sqrt (4) / (5) a) 2 sqrt (5)/5 b) 2 sqrt (5) c) sqrt (5) d) 2 Click here to see answer by rapaljer(4670)

 Question 315628: A Black racer snake travels 32.2 km in 14 hours. What is the spead in km/h? Click here to see answer by stanbon(60771)

 Question 315624: jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 7 hours. How much time would it take for them to mow the lawn together? Click here to see answer by scott8148(6628)

 Question 315634: The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 40mph can stop in 90 ft, how many feet will it take the same car to stop when it is traveling 50mph Click here to see answer by josmiceli(10616)

 Question 315710: I am currently taking Intermediate Algebra, I am having problems with rational expressions. Simplify rational expression 1. x-2/8x^2-32 Multiply Rational Expression 2. 8x^2/x^2-9*x^2+6x+9/16x^3 Divide Rational Expression 3. 3y+12/8y^3/9y+36/16y^3 Add Rational Expression 4. 7/x^2-x-6+5/x-3 Subract Rational Expression 5. 3x/x^2+3x-10-2x/x^2+x-6 Click here to see answer by stanbon(60771)

 Question 315722: If the sides of a square are lengthened by 8cm, the area becomes 169cm^2. Find the length of the original square. Can anyone please help me with this? THank you! Click here to see answer by palanisamy(496)

 Question 315749: How do I SIMPLIFY the rational expression Click here to see answer by Edwin McCravy(9716)

 Question 315748: How do I SIMPLIFY the rational expression Click here to see answer by Edwin McCravy(9716)

 Question 315627: A long distance trucker traveled 180 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 5 hours less time. Find the speed going. Click here to see answer by ankor@dixie-net.com(16523)

 Question 315759: List all numbers for which the rational expression is undefined x^2-4/x^2-8x+15 Click here to see answer by nerdybill(7090)

 Question 315747: How do I solve the rational expression 2x+3/4 - 2x+3/4 Click here to see answer by checkley77(12569)

 Question 315810: A person has 30 coins consisting of dimes and quarters. The total value of the coins is \$4.95. Find the number of dimes and quarters. I tried x(.25)+y(.10)=30 and x(.25)+y(.10)=4.95 Neither came out quite right, so I'm not sure what I'm doing wrong. Please help. Thank you. Click here to see answer by josmiceli(10616)

 Question 315837: List all numbers for which the rational expression is undefined 4/b+7 I am not sure but I think 7 is the anwser. Could you please show me how to do this problem. Click here to see answer by jim_thompson5910(29613)

 Question 315746: How do I solve the rational expression x^2+2x/3x - x^2+5x+6/3x Click here to see answer by mananth(13127)

 Question 315874: Explain the error in the following: x^2 + 2x - 15 = (x-5)(x+3) Click here to see answer by mananth(13127)

 Question 315876: If k represents any positive integer, what is true about the answer you get when multiplying (9x + k)(9x + k)? Click here to see answer by Fombitz(13828)