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

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 Algebra: Polynomials, rational expressions and equations Solvers Lessons Answers archive Quiz In Depth

 Question 294552: Solve using the principle of zero products. (x - 2)(2x + 8) = 0 Click here to see answer by Earlsdon(6287)

 Question 294587: Evaluate the polynomial 4 + 3x + xy^2 + 8x^3y^3 when x = 2 and y = 3. thats my problem. I got 8x^4+3x^2+4x from a website but not sure I know how to do these and just need a sample so I can see what to do? If you write down step for step would be very helpful. Thank you. Click here to see answer by Earlsdon(6287)

 Question 294656: -32y to the 2nd -24y=0 i need help on solving this problem 6h to the 2nd =3h -42z to the 2nd =14z -12p to the second= -8m Click here to see answer by stanbon(57412)

 Question 294660: will you help me with these as soon as possible. 1. the area of a square is (4z^2 - 36z+81ft) find an expression for the perimeter of the square. then find the perimeter when z=10 ft. 2. tell whether x(4x^2 + 19x + 12) is completely factored. if not factor it. Click here to see answer by scott8148(6628)

 Question 294622: Twice the square of a number is 10 more than thenumber. What's the number? Click here to see answer by TakeishaM(13)

 Question 294655: -32y to the 2nd -24y=0 i need help on solving this problem 6h to the 2nd =3h -42z to the 2nd =14z -12p to the second= -8m Click here to see answer by helpnalgebra(91)

 Question 294669: how do i slove this problem h(x)= x^2+4x-5 ; h(x)>0 Click here to see answer by richwmiller(9143)

 Question 294768: WOULD SOMEONE PLEASE ANSWER THIS QUESTION!!!!!!!!!!!!! The number of electric scooters e that a factory can produce per day is a function of the number of hours h it operates and is given by e(h) = 250h for 0 £ h £ 10. The daily cost c to manufacture e electric scooters is given by the function c(e) = 0.05e2 + 60e + 1000. Evaluate (c ○ e)(10), and write a sentence that explains the meaning of your answer. Click here to see answer by richwmiller(9143)

 Question 294611: 2 y +13y+40=0 (y+13)=0 (y+ )=0 y+13=0 y=-13 Click here to see answer by jim_thompson5910(28598)

 Question 294843: The radius of a circle is 1 meter longer than the radius of another circle. If their areas differ by 5 (pie) square meters, then what is the radius of each? Click here to see answer by craigt(10)

 Question 294857: Factor the polynomial x2 + 10x + 9. Enter each factor as a polynomial in descending order. Click here to see answer by Fombitz(13828)

 Question 295198: Hello, I am using the pythagorean theorem to obtain a polynomial equation. This is the scenario: A right angle has a hypotenuse that is 13 inches long. If one leg is 2 inches more than twice the other leg, find the length of the longer leg of the right triangle. I have attempted this using the following information, however I am relatively sure that there is a flaw. leg 1 = x leg 2 = 2x + 2 hypotenuse = x + 13 Applying the pythagorean theorem A^2 + B^2 = C^2 I have formed this equation. (X)^2 + (2x + 2)^2 = (x + 13)^2 My answer should be 12 inches but I cannot figure this out.....PLEASE HELP!!! Thanks, LW Click here to see answer by richwmiller(9143)

 Question 295361: Can you please tell me another way to solve an equation (multiplying a monomial by a polynomial)without distributing? Click here to see answer by richwmiller(9143)

 Question 295444: what method would I use to solve this equation: x/x-2 +4/x+2+8?x^2-4 Click here to see answer by richwmiller(9143)

 Question 295406: Subtract 3.1X + 1.8 from 4X - 5 Choices given (A) 0.9x-3.2 (B) 0.9x-6.8 (C) -0.9x+6.8 (D) -0.9x-3.2 I would like to know if I have the correct answer. I picked (B) 0.9x-6.8 4X-5 - (3.1x + 1.8) 4X - 5 - 3.1x - 1.8 4x -3.1 = 0.9x -5 - 1.8 = -6.8 answer: 0.9X-6.8 my teacher worked it out and came up with 2 different answers. the first time she put 4X-5-3.1X+1.8. then she said worked it the way I did with the parentheses around the 3.1x + 1.8 making both negative numbers. Since half of the class is confused and they disagree with my answer, I would like to know if I solved this problem correct. thank-you! :) Click here to see answer by richwmiller(9143)

 Question 295397: A rectangular garden has a perimeter of 48 cm and an area of 140 sq. cm. What is the length of this garden? Click here to see answer by checkley77(12569)

 Question 295512: The volume of a cube is given by v=s^3, where s is the length of a side. Find the length of a side of a cube if the volume is 800 cm^3. Round the answer to three decimal places. Thank you for your help Click here to see answer by Earlsdon(6287)

 Question 295533: solve for "x" 3x+4 x+2 ---- = --- 3x-1 x-3 I don't understand how i am supposed to get the answer which is x= -1 i just don't understand how to figure it out.. Click here to see answer by Alan3354(30993)

 Question 295550: I am having a lot of trouble with this problem as I am new to this algebra class and I need some help please. DIRECTIONS: simplify your answer, solve the equation -2a+7/8 - 6a-2/2 - a+3/2 =0 a= ?? Click here to see answer by stanbon(57412)

 Question 295525: I started submitting a question and didnt finish so I will do it again. For the following function, C computes a value, where if you add millions of dollars to the value, the result is the cost of implementing a city recycling project when x as a percent(not a decimal equivalent), citizens participate C(x)= 1.5x/100-x a.) Using this model, determine the cost if 60% of the citizens participate? b.)Using this model, find the percentage of participation that can be expected if \$5 million is spent on this recycling project? Set up the equation and solve algebraically. Round to the nearest whole percent. I would appreciate help on this one, I am not sure how to do it, and would love to see it step by step. Thank you for your help Click here to see answer by jim_thompson5910(28598)

 Question 295633: State the possible number of imaginary zeros of g(x) = x^4 + 3x^3 + 7x^2 - 6x - 13 a) 3 or 1 b) 2, 4, or 0 c) exactly 1 d) exactly 3 Click here to see answer by richwmiller(9143)

 Question 295634: Write a polynomial function of least degree with integral coefficients whose zeros include 4 and 2i. Click here to see answer by richwmiller(9143)

 Question 295632: Which describes the number and type of roots of the equation x^2 + 121x = 0 a) 1 real root, two imaginary roots b) 2 real roots, 1 imaginary root c) 3 real roots d) 3 imaginary roots Click here to see answer by richwmiller(9143)

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