Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 255064: The sides of an equilateral triangle are shortened by 12 units,13 units and 14 units respectively and a right angled triangle is formed.Find the side of the equilateral triangle.
Click here to see answer by Theo(13342)

Question 255127: A parabola forms the top of a fencing panel. This parabola can be modeled by the graph of the function y=0.03125x^2-0.25x+4 where x and y are measured in feet and y represents the number of feet the parabola is above the ground. How far above the ground is the lowest point of the parabola formed by the fence?
Do I start of the problem by using the formula
x= -b/2a ?
If so would it be
--0.25/2(0.03125) ?

Thank you very much for reading and reviewing my question. It is okay if you cannot answer it, I understand.
Thank you again so much really appreciate it.
Click here to see answer by stanbon(75887)

Question 255162: f(x)=x^2-7 I'm supposed tell weather the function has a minimum or a maximum value, and we're supposed to find the minumum and maxmum value as well. I donot know how should i procced with the problem. Do I solve the problem with the formula
x=-b/2a yes or no?
Thank You very much for taking time out of your day to help me with my Algebra 1 homework, I really apperciate it. Have a nice day, and thank you again.
Click here to see answer by dabanfield(803)

Question 255201: what are the solutions of the quadratic equation 3xsquared+5x=-4
Click here to see answer by dabanfield(803)

Question 255179: What is the center and the radius of the equation of the circle below?
x^2+y^2+10y-56=0
Click here to see answer by CharlesG2(834)

Question 255215: The equation cos(x) = 0.3x has three solutions. Find their values correct to two decimal places
Click here to see answer by Edwin McCravy(20054)

Question 255297: solve
25x^4-20x^2+3=0
Click here to see answer by richwmiller(17219)

Question 255297: solve
25x^4-20x^2+3=0
Click here to see answer by checkley77(12844)

Question 255297: solve
25x^4-20x^2+3=0
Click here to see answer by CharlesG2(834)

Question 255334: I can substitue everything into the equation but I'm not getting the right answer. What am I doing wrong?
Click here to see answer by rfer(16322)

Question 255368: How can I solve for the real number solution of x^2-100=0?

Click here to see answer by richwmiller(17219)

Question 255366: (x*-3x)+8=0
cant figure out how to do the last part of question after I get here
x= 3 + - square root -23 over 2
Click here to see answer by richwmiller(17219)

Question 255366: (x*-3x)+8=0
cant figure out how to do the last part of question after I get here
x= 3 + - square root -23 over 2
Click here to see answer by drk(1908)

Question 255371: The square of a number plus the number is 132. What is the number?
Click here to see answer by jim_thompson5910(35256)

Question 255512: Find a quadratic model for the set of values
(-2,8),(0,-4),(4,68)
Click here to see answer by richwmiller(17219)

Question 255522: Identify the vertex and the y-intercept of the graph of the function y = -3(x + 2)^2 + 5
Click here to see answer by stanbon(75887)

Question 255645: i need a solver for when the equation is not = 0.
Click here to see answer by stanbon(75887)

Question 255628: solve and check the quadratic equation below by taking the square root of both sides. express irrational answers in radical form.
(x-10)^2=4
check
Click here to see answer by stanbon(75887)

Question 255656: what is x^2 -4 = x
we're doing 'solving equations graphically?
Click here to see answer by Edwin McCravy(20054)

Question 255666: determine whether the given numbers are solution of inequality, x-2≥ 8; -5,0,5,20
Click here to see answer by EMStelley(208)

Question 255739: f(x)= x^2 + 8x-3
Click here to see answer by checkley77(12844)

Question 255750: 2q+3/3 + 3q-4/6 = q-2/2
Is it -5, 5, 2, -2
Click here to see answer by checkley77(12844)

Question 255836: How do you solve -2(x-2)^2+2 ?
Click here to see answer by solver91311(24713)

Question 255930: 1. Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager 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 this equation open up or down? How did you determine this?

b. Describe what happens to the tickets sales as time passes?
c. Use the quadratic equation to determine the last day that tickets will be sold. (Note: Write your answer in terms of the number of days after ticket sales begin.)

d. Will tickets peak or be at a low during the middle of the sale? How do you know?

e. After how many days will the peak or low occur?

f. How many tickets will be sold on the day when the peak or low occurs?

g. What is the point of the vertex? How does this number relate to your answers in parts e and f?

h. How many solutions are there to the equation ? How do you know?

i. What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense?

Click here to see answer by stanbon(75887)

Question 255936: 2x + 3y = 15 find the slope
Click here to see answer by rfer(16322)

Question 256035: Which of the following are the factors of 4b2 � 16?
A. (2b + 4)(2b + 4) C. (2b � 2)(2b + 4)
B. 2(b � 4)(b + 4) D. 4(b � 2)(b + 2)

Click here to see answer by richwmiller(17219)

Question 256064: How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Will you explain this to me, please?
Click here to see answer by richwmiller(17219)

Question 256043: Determine the solutions to the quadratic equation -10x2 + 30x - 20 = 0.
Click here to see answer by drk(1908)

Question 256071: I need a step by step breakdown of 4x-6=2x+4 I know x=5 but I would like the steps as to how to get the answer. also -3+8=-2x+10.
Click here to see answer by drk(1908)

Question 256086: solve this
x^2 + y^2 = 100
using completing the square or any other method
tq :)
Click here to see answer by stanbon(75887)

Question 256080: a doctor places an overweight man on a strict diet to reduce his weight from 200 kg to 80 kg . if he loses 3% of his weight every week how long will it take him to reach his target weight.?
Click here to see answer by solver91311(24713)

Question 256116: which is the solution of (6x+4)^2=77
Click here to see answer by jim_thompson5910(35256)