Tutors Answer Your Questions about Quadratic Equations (FREE)
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(57410) |
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(57410) |
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(15661)  |
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(7569)  |
Question 96402: Hi,
I am having problems trying to figure out what I would do to use a radical expression in my daily life. I know that roofers, builders, engineers, ect. use radical expressions, but I am brain dead to this question. How would I show this equation?
How you might apply radical expressions to your daily life? Explain this application, and discuss what the equation might be.
Thank you very much for your help,
Sherri
Click here to see answer by stanbon(57410) |
Question 96325: The word problem reads as follows: An event coordinator for a theater has requested information about projected ticket sales. you provide him with a quadratic equation that models the expected number of ticket sales for each day x. (x=1 is the day tickets go on sale). Tickets =-0.2x^2+12x+11.
A. does the graph of the equation open or down and how this is determined?
b. What happens to ticket sales as time passes?
c. use the equation to determine the last day that tickets will be sold.
I am very confused on how to work this problem out. Thank you for nay help you can provide.
Click here to see answer by ankor@dixie-net.com(15661) |
Question 96680: This one has me confused. I keep getting an answet with the t still in it so I can not round it like the question wants
The height h in feet of an object after t seconds is given by the function
h = –16t^2 + 80t + 6.
How long will it take the object to hit the ground? Round your answer to the nearest thousandth.
Click here to see answer by edjones(7569) |
Question 96678: I am the worst woth word problems. Could someone help me with this one.
During rush hour, Fernando can drive 35 miles using the side roads in the same time that it takes to travel 25 miles on the freeway. If Fernando's rate on the side roads is 8 mi/h faster than his rate on the freeway, find his rate on the side roads.
Click here to see answer by scott8148(6628)  |
Question 97383: Please help on this problem. solve for x.
2x + 3y=.78
3x + 2y=.72
(In a stationery store, pencils have one price and pens have another. Two pencils and three pens cost 78¢. But three pencils and two pens cost 72¢. How much does one pencil cost?)
Thanks!!!
Click here to see answer by stanbon(57410) |
Question 97426: The problem is -4x^2+8x=0. So far I've done -4x^2+8x+7=0, 4x^2-8x-7=0 then I squared half of the coefficient of x and added to both sides and got 4x^2-8x+16=9 but I can't figure out how to get a perfect square. Did I do something wrong in the first steps?
Click here to see answer by stanbon(57410) |
Question 97672: Been many years since I used the quadratic equation. I seemed to have become a little rusty at it.
I can plug in the a, b & c values but have forgotten the correct proceedure.
a= 6X^2, b= X, c= -2
The formula: -b^2 (+-)(sq.rt.)b^2 -4·ac
so I "plug in" -X^2 (+-), sqrt [x^2 -4·(6x^2·-2)] /2·6x^2
need to know the correct proceedure. I can get the answer from the answer sheet, but tells me very little, as to how to proceed.
Thanks alot!
LR
Click here to see answer by stanbon(57410) |
Question 97772: Hi! can you please help me solve this problem out??
It goes...
Al's flower garden measures 25 feet by 35 feet. He has enough crushed stone to cover 325 square feet. If he uses the stone to build a path around his garden, what is the maximum possible width of the path?
Click here to see answer by mathslover(135) |
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