Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 62724: please help me
on a sales trip gail drives 6oo miles to richmond averaging one speed. the return trip home i made at the same average speed ten mph slower. total time for the round trip is 22 hours. find gails average speed for each part of the trip. this is what i've done:
s=600/(t1) and s-10=600/(t2)
(600/t1)-10=600/(t2)
(600/t2)-(10*t2)=(600*t1)
(600/t2)-(600*t1)-(10*t2)=0
(590*t2)-(600*t1)=0
where do i go from here or am i doing this right at all
thank you for your help
Click here to see answer by 303795(602)  |
Question 62777: Could someone please help me with this. I just don't get algebra, but i'm getting better.
John has 300 feet of lumber to frame a rectangular patio (the perimeter of a rectangle is 2 times length plus 2 times width). He wants to maximize the area of his patio (area of a rectangle is length times width). What should the dimensions of the patio be, and show how the maximum area of the patio is calculated from the algebraic equation.
Show clearly the algebraic steps which prove your dimensions are the maximum area which can be obtained. Use the vertex formula to find the maximum area.
Click here to see answer by stanbon(75887) |
Question 62777: Could someone please help me with this. I just don't get algebra, but i'm getting better.
John has 300 feet of lumber to frame a rectangular patio (the perimeter of a rectangle is 2 times length plus 2 times width). He wants to maximize the area of his patio (area of a rectangle is length times width). What should the dimensions of the patio be, and show how the maximum area of the patio is calculated from the algebraic equation.
Show clearly the algebraic steps which prove your dimensions are the maximum area which can be obtained. Use the vertex formula to find the maximum area.
Click here to see answer by jai_kos(139) |
Question 63073: I have a quadratic function word problem that I need help with. I need help with the questions about it. This is the word problem ------ "Suppose a baseball is shot up from the ground straight up with an initial velocity of 32 feet per second. A function can be created by expressing distance above the ground, s, as a function of time, t. This function is s = -16t2 + v0t + s0
- 16 represents 1/2g, the gravitational pull due to gravity (measured in feet per second2).
- v0 is the initial velocity (how hard do you throw the object, measured in feet per second).
- s0 is the initial distance above ground (in feet). If you are standing on the ground, then s0 = 0."
These are the questions.
What function are they using in this problem?
The ball will be how high above the ground after 1 second?
How long will it take to hit the ground?
What is the maximum height of the ball? What time will the maximum height be attained?
Thank You in advance.
Click here to see answer by Edwin McCravy(20054)  |
Question 63252: Please help me with these answers. Thanks
7. Listed below are the average prices of MyFavoriteStock, Inc. since 2000. Use your calculator to find (a) the Regression Formula (assume it is a linear function: LinReg) and (b) the predicted value in 2020.
Years since 2000 1 2 3 4 5 6
Stock Value per share $8 $10 $13 $11 $14 $16
Regression Formula = __________________
2020 predicted price = __________________
Click here to see answer by uma(370) |
Question 63275: Please help me with this problem, Thanks
Use the Completing the square or shortcut Method to find the Standard Form of the following quadratic function. Standard form: f(x)=a(x-h)^2+k
1. f(x)=x^2-2x-5=_______
Click here to see answer by uma(370) |
Question 63379: Solve for x by completing the square:
kx^2-3cx-4a=0
I have tried but I wonder if there is no solution. Thanks for your time!
By the way, this question is not from any textbook. My teacher had it on the board for the class to solve.
Click here to see answer by ptaylor(2198)  |
Question 63911: Solve by completing the square: I attempted to do this problem, can you please analyze and inform me as to where I may have gone wrong. I think I missed something or did a step wrong.
x^2+10x+13=0
x^2+10x+13-13=0-13
x^2+10x+(5)^2=-13+(5)^2
(x+5)^2=-13+25
(x+5)^2=5
x+5=±5
x+5-5=-5±5
x=-5±5
x=-5-5
x=-10
or
x=-5+5
x=-0
Click here to see answer by venugopalramana(3286) |
Question 63911: Solve by completing the square: I attempted to do this problem, can you please analyze and inform me as to where I may have gone wrong. I think I missed something or did a step wrong.
x^2+10x+13=0
x^2+10x+13-13=0-13
x^2+10x+(5)^2=-13+(5)^2
(x+5)^2=-13+25
(x+5)^2=5
x+5=±5
x+5-5=-5±5
x=-5±5
x=-5-5
x=-10
or
x=-5+5
x=-0
Click here to see answer by joyofmath(189) |
Question 63911: Solve by completing the square: I attempted to do this problem, can you please analyze and inform me as to where I may have gone wrong. I think I missed something or did a step wrong.
x^2+10x+13=0
x^2+10x+13-13=0-13
x^2+10x+(5)^2=-13+(5)^2
(x+5)^2=-13+25
(x+5)^2=5
x+5=±5
x+5-5=-5±5
x=-5±5
x=-5-5
x=-10
or
x=-5+5
x=-0
Click here to see answer by tanimachatterjee(60) |
Question 63927: Kindly assist .
The people welfare state wants to create a welfare agency . its attempting to determine the number of analyst to hire to process welfare applications . efficient experts estimate that the average cost of processing an application is a function of the number of analyst . the cost function is of the form
C = f(x) = 0.01x^2 – 5 Ln x + 60
Determine the numbr of analyst who should be hired in order to minismize the avarage cost per application
Click here to see answer by stanbon(75887) |
Question 63925: Kindly Help !!
USA TWO (UT) processes and sells Tea and coffee products. UT’s revenue function is of the Form R = ax + by ( $ 000 ) , where X and Y are tons of Tea and Coffee products sold . John, in an effort to establish the specific form of the revenue function obtained the following data.
John has also established that UT’s total cost function is specifically:
C = 10x^2 + 20 y^2 + 10xy
Determine the tones of each product that should be processed and sold to maximize profit and the maximum profit
Click here to see answer by stanbon(75887) |
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