Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 118354: Identify the axis of symmetry, create a suitable table of values, and sketch the graph for the following table.
y=x^2-5x+3
I have the axis of symmetry of x=5/2
I know how to graph this equation.
I need help with creating a suitable table of values. I am confused with this. Please help.
Click here to see answer by Earlsdon(6294)  |
Question 118354: Identify the axis of symmetry, create a suitable table of values, and sketch the graph for the following table.
y=x^2-5x+3
I have the axis of symmetry of x=5/2
I know how to graph this equation.
I need help with creating a suitable table of values. I am confused with this. Please help.
Click here to see answer by scott8148(6628)  |
Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre .
Click here to see answer by stanbon(75887) |
Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre .
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 118365: A fountain in the town square sprays water in a parabolic arc. The water spray starts at 1/2 metre above the ground and reaches a maximum height of 5 metres after 3 seconds. Determine the quadratic function that models the path followed by the water in the fountain and use it to determime the height of the water at 1&3/4 seconds . Round your answer to the nearest tenth of a metre .
Click here to see answer by bucky(2189) |
Question 118391: Fab Jeans presently sells ladies' jeans at an average price of $50 a pair,with sales averaging 300 pairs daily. From an analysis of the market, it is estimated that with every $1.50 decrease in the cost of a pair of jeans, daily sales will increase by 25 pairs.
What price should Fab Jeans change to maximize their daily revenue ? What is the maximum revenue ?
If it costs Fab Jeans $12 to make each pair of ladies jeans, what price should the company charge in order to make the greatest profit ?
Click here to see answer by stanbon(75887) |
Question 118401: Please assist me with this question. Iam taking beginning algebra online and the book does not give a example of hoe to answer word problems.
If an object is given an initial velocity of v0 feet per second from a height of S0 feet, then its height S after t seconds is given by the formula . A rock is thrown into the air at 26 feet per second from a height of 13 feet. How long does it take to reach the earth?
Click here to see answer by stanbon(75887) |
Question 118400: Please help me solve this problem. I have no idea how to arrange word problems .
The length of a rectangle is 3 cm more than 2 times its width. If the area of the rectangle is 93 cm2, find the dimensions of the rectangle to the nearest thousandth. Place your answers in the blanks provided.
Width = __________cm, Length = _________cm.
Click here to see answer by stanbon(75887) |
Question 118400: Please help me solve this problem. I have no idea how to arrange word problems .
The length of a rectangle is 3 cm more than 2 times its width. If the area of the rectangle is 93 cm2, find the dimensions of the rectangle to the nearest thousandth. Place your answers in the blanks provided.
Width = __________cm, Length = _________cm.
Click here to see answer by MathLover1(20849)  |
Question 118442: Algebraically determine the exact roots of each equation.
a) sqrt7x-2/sqrt2x = sqrt2x/sqrt7x+2
I got 7x^2-4=2x
7x^2-4-2x^2=0
5x^2-4=0
x=sqrt4/5 My teacher marked it wrong .
b)4/x+1 - x+3/x-2 = -5
I got x= -5+or- 311i/8 Also marked wrong.
Click here to see answer by stanbon(75887) |
Question 118446: It takes a local train 30 minutes longer than the express to travel 216km.The local averages 6km/h less than the express.What is a possible equation which could be used to determine the speed of each train?
I said 216/x-6 - 216/x = 30 but I was marked wrong :(
Click here to see answer by ankor@dixie-net.com(22740) |
Question 118450: Hello, I need some help on finding the value of c that makes each trinomial a perfect square. The problem is;
[n^2+14n+c]
I have tried the formula: [(a+b)^2=a^2+2ab+b^2]
But I seem to be getting stuck trying to find the value of [b]
May someone show me how to work out the problem?
Thank you :]
Click here to see answer by jim_thompson5910(35256) |
Question 117153: I have to simplify each expression. # 11 is: (2+3i)(8-5i).
And # 14 is: Physics
For a model rocket, the altitude h, in meters, as a function of time t, in seconds, is given by h=68t-8t(squared). Find the maximum height of the rocket. How long does it take to reach the maximum height?
Click here to see answer by wgunther(43) |
Question 118529: A rectangular parking lot has dimensions 16 metres by 40 metres. The total area of the parking lot is increased by 512 metres by paving an extra strip of uniform width around the entire lot. How wide is the strip ?
I tried (x+16)(x+40)=640+512 and found x=-64 and x=8 so width must be 8 metres since it cannot be negative but I only got partial marks:(
Click here to see answer by josmiceli(19441)  |
Question 118531: A flare is fired as a stress signal and its height ,h in metres above the ground, t seconds after firing, is provided in the table below. Algebraically determine the quadratic function that defines the height of the flare above the ground t seconds after firing, and use it to determine the flare's height at 2.4 seconds.
t---0 1 2 3 4
h---2 97 182 257 322
I tried y=-2ak^2
97=-2a(1)^2
97/-2=-2a/-2
a=-48.5 and was completly lost :( Please Help Me :)
Click here to see answer by scott8148(6628) |
Question 118531: A flare is fired as a stress signal and its height ,h in metres above the ground, t seconds after firing, is provided in the table below. Algebraically determine the quadratic function that defines the height of the flare above the ground t seconds after firing, and use it to determine the flare's height at 2.4 seconds.
t---0 1 2 3 4
h---2 97 182 257 322
I tried y=-2ak^2
97=-2a(1)^2
97/-2=-2a/-2
a=-48.5 and was completly lost :( Please Help Me :)
Click here to see answer by solver91311(24713)  |
Question 118528: A rectangular lawn has dimensions 30m by 40m. A strip of uniform width is to be placed around the perimeter. How wide should the strip be so that exactly half the lawn gets mowed?
I tried (2x-30)(2x-40) and found x=5m but I was marked wrong by my teacher :(
Click here to see answer by scott8148(6628) |
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