Tutors Answer Your Questions about Polynomials-and-rational-expressions (FREE)
Question 32232: The height above the ground of a ball thrown up with a velocity of 96 feet per second from a height of 6 feet is 6+96t-16t square feet, where t is the time in seconds. According to the model, how high is the ball after 7 seconds. I tried puttung 7 in the place of t and came up with a negative number.
Click here to see answer by stanbon(26259)   |
Question 31730This question is from textbook College Algebra
: I tried all day to figure the solving process out but got so frustrated and brain dead, that I knew I better punt this one to a person who really knows his stuff t+o help me.
I hope someone can reply back to me before Thursday morning(3-30) as this take homne quiz has to be turned back in then.
Please help me solve this equation:
(4ax-2by=2cx+5)
Thnk You very Much.
Robert SvetmanThis question is from textbook College Algebra
Click here to see answer by stanbon(26259) |
Question 32275: A small airplane travels between two cities A and B, 600 miles apart. When going from city A to city B, the plane encounters headwind and reaches city B four hours after leaving. With the wind the return trip takes three hours.
What is the airspeed of the plane? What is the speed of the wind?
Click here to see answer by Paul(988) |
Question 32277: Two kilograms of Columbian coffee are mixed with 1 kilogram of Brazilian coffee to produce a mixture selling for $7.00 a kilogram. If 3 kilograms of Columbian coffee were mixed with 2 kilograms of Brazilian coffee, the mixture would sell for $6.90 a kilogram. What is the value of a kilogram of each type of cofee?
Click here to see answer by mukhopadhyay(490) |
Question 32277: Two kilograms of Columbian coffee are mixed with 1 kilogram of Brazilian coffee to produce a mixture selling for $7.00 a kilogram. If 3 kilograms of Columbian coffee were mixed with 2 kilograms of Brazilian coffee, the mixture would sell for $6.90 a kilogram. What is the value of a kilogram of each type of cofee?
Click here to see answer by checkley71(8405) |
Question 32279: Please help me solve this equation:
Multiply. (2x^2+4x-5)(x^2+3x+3)
Answers:
(A) 2x^4+6x^3+13x^2-3x-15
(B) 2x^4+10x^3+13x^2-3x-15
(C) 2x^4+10x^3+18x^2-3x-15
(D) 2x^4+6x^3+18x^2-3x-15
The only thing I could think of to solve is FOIL but I did not get any of the answers listed. Thanks
Click here to see answer by mukhopadhyay(490) |
Question 32279: Please help me solve this equation:
Multiply. (2x^2+4x-5)(x^2+3x+3)
Answers:
(A) 2x^4+6x^3+13x^2-3x-15
(B) 2x^4+10x^3+13x^2-3x-15
(C) 2x^4+10x^3+18x^2-3x-15
(D) 2x^4+6x^3+18x^2-3x-15
The only thing I could think of to solve is FOIL but I did not get any of the answers listed. Thanks
Click here to see answer by mbarugel(146) |
Question 30943: PLEASE help me with these problems. Thanks.
1. The volume of the box is represented by (x^2+5x+6) (x+5). Find the polynomial that represents the area of the bottom of the box.
Add or subtract as indicated.
2. 2/5w+10 - 3/2w-4
3. 3/x^2+4x+3 - 1/x^2-9
4. 4y/y^2+6y+5 + 2y/y^2-1
Thanks again!
Click here to see answer by checkley71(8405) |
Question 32311: Karen and John both inherited equal amounts of money and decided to invest them in two different banks
One investment earns 5% and the other 7%
John invested part of his money at 5% and the rest 7% After a year his investment earned him $2700
Karen invested at 5% the amount John ivested at 7% She also invested 7% of the amount that John invested at 5% Her investment earned her $3300 after one year
How much did Karen invest at
5%
7%
How much did John invest at
5%
7%
Click here to see answer by mukhopadhyay(490) |
Question 32311: Karen and John both inherited equal amounts of money and decided to invest them in two different banks
One investment earns 5% and the other 7%
John invested part of his money at 5% and the rest 7% After a year his investment earned him $2700
Karen invested at 5% the amount John ivested at 7% She also invested 7% of the amount that John invested at 5% Her investment earned her $3300 after one year
How much did Karen invest at
5%
7%
How much did John invest at
5%
7%
Click here to see answer by checkley71(8405) |
Question 32385This question is from textbook
: This is one of my daughters homework problems. I can not find an example in the text that she can apply to the problem, Can someone please explain the necessary steps.
Northern maywood voted 60% to 40% in favor of a water project. Southern maywood voted 90% to 10% against the project. The project passed 55% to 45%. If 5900 people voted how many were from southern maywood.This question is from textbook
Click here to see answer by venugopalramana(3286)  |
Question 32316This question is from textbook Beginning Algebra
: I am having difficulty in understanding the concept of factoring polynomials. I am having trouble with several problems, so I think the difficulty lies in the lack of understanding on my part of factoring. I have a problem from the Fourth Edition of Beginning Algebra by K. Elayn Martin-Gay by Pearson, Prentice Hall. Here is a couple of the problems that I am having difficulty with. I hope that you are able to help me understand them. Thank you!
These actual problems are from a worksheet from class. The instructions state:
Factor each trinomial. Be sure to "FOIL" your answer and check the middle term when trying number combinations.
1). 7x^2 - 18x + 8 =
(7x - 4) (x - 14) = This is where I get lost.
2). 5x^2 - 9x + 1 =
(5x - ? ) (x - ? ) = Since no two factors equal 9, I'm confused and don't
know how to even begin this one.
3). 7x^2 - 8x + 1 =
(7x - 7) (x - 1) =
I can't seem to get any further with these problems. Hope you can help me. Thank you.This question is from textbook Beginning Algebra
Click here to see answer by venugopalramana(3286) |
Question 32438: Please help answer the following problem.
(x+1)^3 - (x-1)^3
This is what we have so far: (x+1)(x+1)(x+1) = x^3+3x^2+3x+1
However, we are confused about how to handle the subtration between the two expressions in parenthesis that needs to be cubed. Please provide a detailed description, because we have several problems with this same format.
Thanks so much!!
Click here to see answer by venugopalramana(3286) |
Question 32440: I have another problem that I need some help. My first response was extremely helpful.
Here's my problem:
(x^2-3x+1)^2 - (x^2+5x+1)^2
What we have so far is: (x^2-3x+1)^2 = x^4-6x^3+11x^2-6x+1.
Confused about how to handle the subtraction sign for the following expression. Should it be distributed out throughout the problem? Thanks very much for your help!
Click here to see answer by mukhopadhyay(490) |
Question 32574: In Solving Equations with Rational Expressions how do I answer this problem:
x/2 - 2/3 = 1/x? I figured out this: x/3-2/3 = 1/x, x-2/3 = 1/x, then I cross multiply and I would be at x^2-2x = 3 but after that I'm stuck.
Click here to see answer by Earlsdon(4898) |
Question 32327: Unsure of how to type "X to the third" etc so it appears as X3
7-X..........X3+27
___....x....________
X+3.........X2-9X+14
7X3+189-X4-27X.......6X3+147
______________ = ____________ Is This Correct? Thank You Very Much!
X3+4X2-13X+42......X4+4X2+14X
(That reads as 6X to the third plus 147 over
X to the 4th + 4X squared + 14X)
Click here to see answer by mukhopadhyay(490) |
Question 32328: Unsure of how to type "X to the third" etc so it appears as X3
7-X..........X3+27
___....x....________
X+3.........X2-9X+14
7X3+189-X4-27X.......6X3+147
______________ = ____________ Is This Correct? Thank You Very Much!
X3+4X2-13X+42......X4+4X2+14X
(That reads as 6X to the third plus 147 over
X to the 4th + 4X squared + 14X)
Click here to see answer by mukhopadhyay(490) |
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