Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 563721: Give exact and approximate solutions to three decimal places.
y^2-2y+1=81
a. The solutions are y= -8,10
b. There are no approximate solutions since the solutions are integers.
Since the solutions I got are integers, I'm confused as to whether my answer is right. If my answer is right could someone tell me how I get it to three decimal places. Thank You
Click here to see answer by solver91311(24713)   |
Question 563890: Average mass of a group of people is 45.2kg. A newcomer to the group weighs 51kg, which increases the average by 0.2kg How many people are now in the group?
This is a question which needs a quadratic equation to be set up in the form ax˛+bx+c=0 so that it can be solved using the quadratic formula. I just can't figure out how to set it up. Please help me! :-)
Click here to see answer by mananth(16946)  |
Question 563930: I have a bit of a problem with this word problem:
A ball is hit by a bat when 3 ft off the ground. It is caught at the same height 300 feet from the batter. How far from the batter did it reach its maximum height?
I was thinking 150 feet from batter, but that seems too simple. Any help?
Click here to see answer by scott8148(6628)  |
Question 564060: I guess there were five questions i needed help with...
a small dinner roll has 10 fewer calories than twice the number of calories in a slice of white bread. Together they contain at least 185 calories. Find the smallest possible number of calories in the slice of white bread.
thats it thanks in advance again have a great day)
Click here to see answer by stanbon(75887) |
Question 564062: ok here goes the fourth question...
45>m>35
there is also a straight line under the second arrow that points to the 35
I tried to send this before but it didnt show up so i hope it didnt go through twice. sorry if it did
thanks again
Click here to see answer by richard1234(7193)  |
Question 564052: I am not sure what topic this question would fall under since i didn't find word problems under the algebra stuff. sorry. anyways i have been working on 4 questions for the last 2 months and i just cannot figure it out so maybe you can help.
a company has four large buses and five small ones. Each large bus has 12 seats more than a small bus. The total seating capacity of all buses is 336. how many seats are on a large bus?
Thanks in advance)
Click here to see answer by KMST(5328)  |
Question 564173: Hi, I am having a problem forming the equation from a worded problem. I am struggling to understand what the terms mean in this equation and how they worked them out. I understand how to solve and can write quadratic motion equations. I have a good understanding.
The problem is: A school concert usually attracts 600 people at a cost of $10 per person. On avaerage for every $1 rise in admission price, 50 less people attend the concert. If T is the total amount of takings and n is the number of $1 increases write a rule for the function which gives T in terms of n.
The answer is: T = 6000 + 100n -50n^2
My thinking is that the 6000 represents the miinmum of the independant variable 600 people at $10 each which totals $6000. So this is where the parabola will start from the y-axis (i.e at zero). But how did they get the 100n? What does this mean in the context of the problem and why n^2?
Why isn't it linear? Like T = 6000 - 50(n)
Your help would be appreciated.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 564173: Hi, I am having a problem forming the equation from a worded problem. I am struggling to understand what the terms mean in this equation and how they worked them out. I understand how to solve and can write quadratic motion equations. I have a good understanding.
The problem is: A school concert usually attracts 600 people at a cost of $10 per person. On avaerage for every $1 rise in admission price, 50 less people attend the concert. If T is the total amount of takings and n is the number of $1 increases write a rule for the function which gives T in terms of n.
The answer is: T = 6000 + 100n -50n^2
My thinking is that the 6000 represents the miinmum of the independant variable 600 people at $10 each which totals $6000. So this is where the parabola will start from the y-axis (i.e at zero). But how did they get the 100n? What does this mean in the context of the problem and why n^2?
Why isn't it linear? Like T = 6000 - 50(n)
Your help would be appreciated.
Click here to see answer by bucky(2189) |
Question 564945: I need help on this one please
f(x)= 1/4(x+9)^2+1
I need to find out what the vertex is____
I need to find out what the line of symmentry is _____
I need to find out what is the max/min value of fx is _________
Click here to see answer by Alan3354(69443)  |
Question 564945: I need help on this one please
f(x)= 1/4(x+9)^2+1
I need to find out what the vertex is____
I need to find out what the line of symmentry is _____
I need to find out what is the max/min value of fx is _________
Click here to see answer by htmentor(1343)  |
Question 565617: I have to come up with an quadratic equation with the solutions of:
x=-3
x=0
x=5
I am confused because I was no aware of a solution being a negative number, or quadratic equation having 3 soultions. I am speechless on how to come up with an quadratic equation. Could you please help me?
Click here to see answer by stanbon(75887) |
Question 565891: A 24-inch-wide sheet of metal is to be bent into a rectangular trough with the cross section shown in the illustration. Find the dimensions that will maximize the amount of water the trough can hold. That is, find the dimensions that will maximize the cross-sectional area.(depth and width = 24 inches)
Click here to see answer by solver91311(24713) |
Question 566000: The directions are: Solve over the complex numbers
The problems are b-3 sqrt of b -10=0 (b minus 3 times the square root of b minus 10 equal 0.
and 2x-9 sqrt x + 4=0 (2x minus 9 times the square root of x plus 4)
The title of the paper is the Discriminant: equations in quadratic form. Since there is no squared number in these I don't know how to begin doing them.
Thank you!
Click here to see answer by stanbon(75887) |
Question 567353: A flag is raised while an onlooker watches from a distance of 21 feet away from the base of the flag pole (see the figure below). The flag rises vertically at a rate of 8 inches per second. Let t denote the time (in seconds) after the flag begins to rise (For simplicity, assume that when the flag begins to rise it is 0 inches above the ground). Express the distance d (in feet) between the flag and the onlooker as a function of t.
All of the answers I come up with are incorrect! Any help is greatly appreciated!!! Thanks!
Click here to see answer by ankor@dixie-net.com(22740) |
Question 567351: A box with an open top is constructed from a rectangular piece of cardboard which is initially 30 inches long and 23 inches wide. The box will be formed by removing squares of length x inches from each corner and then folding up the sides (as shown below). Express the volume (V) of the box as a function of x.
I've been trying to figure out this problem for a while, any help is greatly appreciated!!! Thanks!
Click here to see answer by ankor@dixie-net.com(22740) |
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