Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 94625: Write three quadratic equations with a,b,c (coefficients of x^2, x, and the constant) as:
1. integers
2. rational numbers
3. irrational numbers
This is what I did.
1. 4x^2 + 11x + 6 = 0
2. x^2 + 2x = -1
3. 3z^2 + z - 1 = 0
Are these correct?
Click here to see answer by jim_thompson5910(35256)  |
Question 94569: A designer, attemptng to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out. When he tried to add one more row and column, he found that he was short of 25 characters. Can you find the number of characters used by the designer?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 94567: A professor started a project with a group of students, 60% of whom were boys. Due to some unavoidable reasons, six girls couldn't turn up, so the professor had to make some changes in the group. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involved in the project initially.
Click here to see answer by ankor@dixie-net.com(22740) |
Question 95109: Translate the following into a quadratic equation, and solve it:
The length of a rectangular garden is three times its width; if the area of the garden is 75 square meters, what are its dimensions?
I don't see how I'm going to get the x2 part of the equation out of this..or any of it. please help!
Click here to see answer by scott8148(6628)  |
Question 95124: 3(5x-2)=54
How do i solve this? The solution is X=4 I don't understand how X can be 4.
-5 + X = -21 How do i solve this? The solution is -16. I don't understand how it can be -16
7-4X > 3-3X How do i solve this? The solution is < 4 I don't understand how the answer can be < 4
liobacasey16@yahoo.com I take on line class, have no text book.
Click here to see answer by checkley71(8403) |
Question 95236: Good Morning and God Bless You,
I am struggling through College Algebra. I do not understand utilizing graphs, but I am spending all waking hours trying!
My problem is: Use the graph of y=x2+4x+5 to answer the following:
a. Using the graph what are the solution(s) to the equation -x2+4x+5=0?
b. Does this function have a maximum or a minimum?
c. What are the coordinates of the vertex in (x,y) form?
d. What is the equation of the line of symmetry for this graph?
The questions go on and on, but that is my limit of four. I asked one other question of this site last week which was extremely helpful. Also, how do I sign up for tutoring? I do believe I need extra help. Thank you in advance and God Bless you.
Click here to see answer by checkley71(8403) |
Question 95237: university of phoenix elementary and intermediate algebra solving quadric equations by factoring . while finding the amount of seed needed to plant his three square wheat fields. hank observed the side of one field was 1 kilometer longer than the side of the smallest field and that the side of the largest field was 3 kilometers longer than the side of the smallest field . if the total area of the three fields is 38 square kilometers, then what is the area of each field?
Click here to see answer by stanbon(75887) |
Question 95401: Some students planned for a get-together. The budget for food was $500. Five of the students failed to come because of the distance and therefore the cost of food for each member increased by $5. How many students attended the get-together?
*note* I really would like some help as to how to setup this question. Thank you!
Click here to see answer by stanbon(75887) |
Question 95400: A designer, attempting to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out. When he tried to add one more row and column, he found that he was short of 25 characters. Can you find the number of characters used by the designer?
*note* I really would like some help as to how to setup this question. Thank you!
Click here to see answer by stanbon(75887) |
Question 95896: I'm struggling on this one & it's probably easy but I just can't seem to get it, PLEASE HELP...
Quadratic Eq.
Jane invested some amount of money at a rate of 12% simple interest and some other amount at the rate of 10% simple interest. She received yearly interest of $130.Randy also invested in the same scheme, but he interchanged amounts invested and received $4 more interest. How much did each of them invest at different rates?
Click here to see answer by checkley71(8403) |
Question 95965: taking flying lessons to get pilot's license. The cost of introductory lesson is 5/8 the cost of each additional lesson, which is $80. You have a total of $375 to spend on the flying lessons. How many lessons can you afford? How much money will you have left?
Click here to see answer by nkadisamuel(2) |
Question 96002: i need to solve this equation for x:
x^3+ 7.07x^2 + 2.72x -14.75=0
i tried factoring out an x and then applying the quadratic equation but it doesnt seem right please guide me in the right direction. thank you
Click here to see answer by stanbon(75887) |
Question 96205: Please help me solve this problem:
y^4/3 = -3y
This is what I have done:
y^4/3 + 3y =0
1. The exp of y is understood to be 1...so does this mean that I need to find the commoon denominator of the exp so that I could add? Should the exp of 3y then be 1/3?
y^4/3 + 3y^1/3= 0
2. Then in the book it says to factor out maybe 1/3?
This is where I get confused, because the problem in the book that is simmilar looks like this:
x^3/2= x^1/2
x^3/2- x^1/2= 0
x^1/2(x-1)) =0 How are they factoring out x^1/2? Is x^1/2(x-1) = x^3/2 -x^1/2
3. So once they get x^1/2= 0 and x-1=0
so the answer is x=0 and x=1
Click here to see answer by stanbon(75887) |
Question 96205: Please help me solve this problem:
y^4/3 = -3y
This is what I have done:
y^4/3 + 3y =0
1. The exp of y is understood to be 1...so does this mean that I need to find the commoon denominator of the exp so that I could add? Should the exp of 3y then be 1/3?
y^4/3 + 3y^1/3= 0
2. Then in the book it says to factor out maybe 1/3?
This is where I get confused, because the problem in the book that is simmilar looks like this:
x^3/2= x^1/2
x^3/2- x^1/2= 0
x^1/2(x-1)) =0 How are they factoring out x^1/2? Is x^1/2(x-1) = x^3/2 -x^1/2
3. So once they get x^1/2= 0 and x-1=0
so the answer is x=0 and x=1
Click here to see answer by ankor@dixie-net.com(22740) |
Question 96379: square root(2x-9)= 1/3
The first thing I did was square both sides to get rid of the radical. This leaves: 2x-9 = 1/9
Am I supposed to add nine to both sides? When I tried to do this I ended up with this: 2x= 1/9+ 9
2x= 1/9+ 9/1
2x = 1/9+ 81/9
2x= 82/9
1. This doesn't seem right. How do I get rid of the 2?
Click here to see answer by edjones(8007)  |
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