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Tutors Answer Your Questions about Rational-functions (FREE)
Question 50117: I have really been struggling with this chapter especialy section 5.6 Applications of Rational Expressions. I guess the story problems are wearing me down. could you please help me to see these in a better light? I tried setting it up however I know I am going about it wrong.
Sec 5.6 N 26
Science and medicine. A plane flies 720 mi against a steady 30-mi/h head wind and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane’s speed in still air?
(720/x+30)+ (720/x-30)=10
Click here to see answer by stanbon(26297)   |
Question 50432This question is from textbook Algebra 2 and Trigonometry
: Hello, I'm Alex, and having some difficulty with "American School" Homeschool work that I need in order to graduate high school. If you could please assist me in my attempt to complete it, I would be most gracious.
Here are a few of the problems:
1.Solve: 3(x-2)^2 =48
2.If y varies directly as x and inversely as z^2, and y=3 when x=2 and z=4, what is the value of x when y=9 and z=4?
3.Solve the equation x^3 + 2x^2 + x + 2 = 0, if -2 is a root
4.Given the equation x^3 - 2x^2 + x - 3 = 0, what are the possible rational roots?
5. Find the dimensions of a rectangle "a" with the greatest area whose perimeter is 30 feet.
6. Given the equation x^3 - 4x^2 + 2x + 1 = 0, find the irrational roots? (Use the quadratic formula to solve the depressed equation.
7. Approximate to the nearest tenth, the real root of the equation f(x) = x^3 - 4 = 0This question is from textbook Algebra 2 and Trigonometry
Click here to see answer by venugopalramana(3286)  |
Question 50574: I don't understand the instructions given to me. They read as follows: Find the product of the polynomials.
1. (4x-1)^2
What I tried is multiplying (4x-1)(4x-1); my final answer was 16x^2-8x+1
I just don't know if that's what I'm supposed to do.
Click here to see answer by mszlmb(115)  |
Question 51097: I have 14, 8ft railroad ties. I cannot cut these ties. I need to know the maximum area and dimensions of a rectangle using the uncut ties. So far I have:
2L+2W=112
L+W=56
W=56-L
A=L(56-L)
A=-L^2+56L
L=-b/2a=-56/2(-1)=28
I came up with max area =784'^2 and dimensions 28' x 28'. Then I realize that can't be right because I would have to cut the rr ties. How do I figure in the uncut ties?
Click here to see answer by checkley71(8405) |
Question 52307This question is from textbook 
: i need help solving this problem, g(x)=2x-1
a. find the domain of g
b. use the formula for g(x) shown in the graph to evulate g(-1) and g(2)
c. use the graph to evaulate g(-1) and g(2)This question is from textbook
Click here to see answer by funmath(2873) |
Question 52416: I am having a problem with 11/14 over 4 - 6/7. I know to use the Order of Operations: Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction. Sometimes, I become stymied with some of the problems. Our professor doesn't explain the actual mechanics of a problem. I haven't been in school in 42 years.
Click here to see answer by rapaljer(3625) |
Question 52415: I am having a problem with 11/14 over 4 - 6/7. I know to use the Order of Operations: Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction. Sometimes, I become stymied with some of the problems. Our professor doesn't explain the actual mechanics of a problem. I haven't been in school in 42 years.
Click here to see answer by rapaljer(3625) |
Question 52424: A right triangle is a triangle with one angle measuring 90°. In a right triangle, the sides are related by Pythagorean Theorem, where c is the hypotenuse (the side opposite the 90° angle). Find the hypotenuse when the other 2 sides’ measurements are 3 feet and 4 feet.
Answer:
Show work in this space
Click here to see answer by Nate(3495) |
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