Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 135887: Media Services charges $20 for a phone and $30/month for its economy plan.
Formulate a model that can be used to determine the total cost, C(t), of operating a Media Services phone for t months.
C(t)=?
HELP!!!
Click here to see answer by stanbon(75887)  |
Question 136135: Quadratic equations can be solved by graphing, using the guadratic formula, completing the square and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Why method do you prefer and why?
Click here to see answer by solver91311(24713)  |
Question 136151: Please, am in dire need of the answer to this question. it is urgent.
A rectangular yard is to be constructed along the side of a house using a fence on three sides. The house wall will serve as the fourth side. Find the dimensions that produce the maximum area if 40 meters of fence is available.
Thanks.
Click here to see answer by checkley77(12844) |
Question 136159: please, help mw with this
A ball is thrown upward at a velocity of 12 feet per second from a height that is 40 feet above the ground. The height A (in feet) of the ball at time t (in seconds), after it is thrown, can be found by the formula h = -12t2 + 14t + 40
Find the time, in seconds, when the ball is again 40 feet above the ground.
Thanks
Click here to see answer by vleith(2983) |
Question 136159: please, help mw with this
A ball is thrown upward at a velocity of 12 feet per second from a height that is 40 feet above the ground. The height A (in feet) of the ball at time t (in seconds), after it is thrown, can be found by the formula h = -12t2 + 14t + 40
Find the time, in seconds, when the ball is again 40 feet above the ground.
Thanks
Click here to see answer by JSmall(7) |
Question 136129: The horse is tethered to a rope, at one end of a square corral(outside the corral) 10 feet on a side. The horse can graze at a distance of 18feet from the corner of the corral where the rope is tied. What is the total grazing area of the horse.
Click here to see answer by checkley77(12844) |
Question 136231: The function f(x) = 0.0037x2 – 0.46x +36.63 models the average age at which Kentucky men were first married x years after 1900. In which year was this average age at a minimum? What was the average age at first marriage for that year?
Please help me.
Click here to see answer by stanbon(75887) |
Question 136230: Thanks for the previous questions answered. Pls, I need your help here, and it is urgent
An object is thrown vertically upward where its height, in meters, is given by
s(t) = -5t2 + 25t and t is the time, in seconds. Answer the question below.
What is the velocity of the object at 1 second after it has been released?
Thanks
Click here to see answer by solver91311(24713) |
Question 136230: Thanks for the previous questions answered. Pls, I need your help here, and it is urgent
An object is thrown vertically upward where its height, in meters, is given by
s(t) = -5t2 + 25t and t is the time, in seconds. Answer the question below.
What is the velocity of the object at 1 second after it has been released?
Thanks
Click here to see answer by Earlsdon(6294) |
Question 136350: Could you please help me? I am so lost on how to do these....  I tried to do the part where you take half of b and got 3.5... then squared it to get 12.25 and put it back in for c and got x^2+7x+12.25=-12+12.25 but i"m lost other than that. We're supposed to be "solving quadratic equations by completing the square" if it helps any.
Click here to see answer by Edwin McCravy(20054)  |
Question 136354: Please help me, it asks:
In the equation ax^2+bx+c=0, the value of b^2-4ac is called the discriminant of the quadratic equation. What does this value tell you about the real roots of the equation?
I solved this, and it turned out wrong. Please help me, Thank You=)
Click here to see answer by Edwin McCravy(20054) |
Question 136406: Write an equation of the line containing the given point and perpendicular to the given line. Express your answer in the form y=my+b
(6, 7); 3x + y = 6
Can someone please help me solve this problem?? I need help with these I do not understand these at all.
Click here to see answer by scott8148(6628)  |
Question 136458: Once again, I am in need of your help. I am stuck on a quadratic equation that I have to graph... and out of 16 problems on this worksheet, this is the only one I have not been able to solve. This is not from my book, this is off of a worksheet.
This is what I have so far:
y= x^2 + 2
a=1 b=0 c=2
a=1 > 0 parabola opens upwards
x=0
y=0^2 + 2
y-intercept is (0,2)
y=0 0=x^2 +2
x= -0±√(0^2-4(1)(2)
-------------------------------
2(-1)
x= 0±√(0-8)
-----------------
2
X=0 and this is where I am stuck at. I am sorry your page is not allowing me to use the proper quadratic equation form. I did the best that I could.
Would you please help me work through this? Thanks!! ~Lynn
Click here to see answer by vleith(2983) |
Question 136457: Once again, I am in need of your help. I am stuck on a quadratic equation that I have to graph... and out of 16 problems on this worksheet, this is the only one I have not been able to solve. This is not from my book, this is off of a worksheet.
This is what I have so far:
y= x^2 + 2
a=1 b=0 c=2
a=1 > 0 parabola opens upwards
x=0
y=0^2 + 2
y-intercept is (0,2)
y=0 0=x^2 +2
x= -0±√(0^2-4(1)(2)
-------------------------------
2(-1)
x= 0±√(0-8)
-----------------
2
X=0 and this is where I am stuck at. I am sorry your page is not allowing me to use the proper quadratic equation form. I did the best that I could.
Would you please help me work through this? Thanks!! ~Lynn
Click here to see answer by Earlsdon(6294) |
Question 136503: Here's my question...if the graph of the equation y=f(x), where the vertex of the parabola is 0,0 and P:(2,4), if h(x)=f(x)+3, in (x,y) format what would the new coordinates of P be after the shift? And, if k(x)=-f(x), what would the new coordinates of P be after the reflection? Thanks so much!
Click here to see answer by stanbon(75887) |
Question 136530: I am trying to help my son with a problem. He is doing parabolas. This is the one the teacher did in class and I don't understand what she did. (((y=x^2+8x+6)))....y-6+16 = x^2+8x+16....y+10=(x+4)^2....vertex (-4,-10) Domain is all real numbers, range is y is greater than or equal to -10, minimum is -10. Could you pleas explain her procedure here. Thank you!
Click here to see answer by scott8148(6628) |
Question 136681: The function W(d)= 0.112d approximates the amount, in centimeters, of water that results from d cm of snow melting. Find the amount of water that results from snow melting from depths of 19cm, 42 cm, and 75 cm.
How do i go about figuring this one out??
Click here to see answer by vleith(2983) |
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