Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 471748: Solve the formula for the given letter. Assume all variables represent non-negative numbers
E= mc^2. for c
^is raising to that power
Click here to see answer by richard1234(5390)

Question 471745: solve 4x+x(x-2)=0

find the x intercepts of f(x)=4x+x(x-2)
Click here to see answer by robertb(4012)

Question 471743: Find the x and y intercepts
f(x)=-x^2+3x+10
^means it is raising to that power
Click here to see answer by robertb(4012)

Question 472039: determine the nature of the solutions of the equations
x^2-17=0
^means it is raising to that power
a) 2 real solutions
b) 2 imaginary solutions
c) 1 real solution
Click here to see answer by MathLover1(6638)

Question 472042: A student opens a mathematics book to two facing pages. The product of the page numbers is 110. Find the page numbers.
The first page is ?
The second page is ?
Click here to see answer by richard1234(5390)

Question 472171: -x^2+7x=4
I changed it to -x^2+ 7x -4 = 0
and quadratic equation would be -b+/- the square root of b^2 -4ac all over 2a.
a=-1
b= 7
c= -4
and I got 7.5 and 0.5 but when I plug it back in it does not work!
Help is MUCH appreciated!
Click here to see answer by jim_thompson5910(28598)

Question 472063: Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Which method do you prefer? Why?

Click here to see answer by richard1234(5390)

Question 472468: Find the vertex and the line of symmetry. Graph the function
f(x)=2(x-2)^2
^ means it is raising to that power
Click here to see answer by ewatrrr(10682)

Question 472472: a)solve 5x^2=10
b)find the x intercepts of f(x)=5x^2-10
^means it is raising to that power
Click here to see answer by ewatrrr(10682)

Question 472478: Find and label the vertex and the line of symmetry. Graph the function
f(x)=5x^2
^means it is raising to that power
Click here to see answer by ewatrrr(10682)

Question 472475: The number of tickects sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.4x^2+12x+11, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?

^means raising to that power
Click here to see answer by ewatrrr(10682)

Question 472492: find the vertex, the line of symmetry, and the maximum or minimum value of f(x). Graph the function.
f(x)= -(x+1)^2-3
^means it is raising to that power
Click here to see answer by Alan3354(30993)

Question 472574: If you are looking at a graph of a quadratic equation, how do you determine where the solutions are?

Click here to see answer by richard1234(5390)

Question 472582: How do you solve the quadratic equation 3k^2 + 7K=4?
Click here to see answer by jim_thompson5910(28598)

Question 472742: What is the standard form of a quadratic equation for the following problem and how can I understand it? (48n +3)(n-2) -48 = 22
Click here to see answer by stanbon(57387)

Question 472862: I have to find the x and y intercepts axis of symmentary and vertex of this equation
y= -x^2/2+3x+8
to find x intercepts told to mutiply by -2, which makes equation
y=x^-6x-16
would I find axis of symmentry and vertex from the new values or from original equation.
Click here to see answer by ewatrrr(10682)

Question 472894: solve for x
x^2+14x+4=0
^means it is raising to that power
Click here to see answer by Alan3354(30993)

Question 472895: Find the vertex, line of symmetry, the maximum or minimum value of the quadratic function, and graph the function
f(x)=-2x^2+2x+3
^ means it is raising to that power
Click here to see answer by rfer(12670)

Question 472896: For the scatterplot, determine which of the following types of functions might be used as a model for the data.
a)linear
b)not linear or quadratic
c)quadratic
the points are located at the following:
(1,12)
(3,8)
(5,7)
(7,7)
(9,8)
Click here to see answer by solver91311(16897)

Question 472964: Please solve this quadratic equation by completing the square and factoring:
2m^2 + 5m = 12
Click here to see answer by jim_thompson5910(28598)

Question 472980: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx+c=0. Solution:2,only solution
Click here to see answer by jim_thompson5910(28598)

Question 472959: b squared + x squared = a squared
Click here to see answer by Alan3354(30993)

Question 473026: Aki's Bicycle Design has determined that when x hundred bicycles are built, the average cost per bicycle is given by C(x) = 0.5x^2 - 1.5x + 6.736, where c(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?
The shop should build ____ bicycles.
Click here to see answer by ccs2011(207)

Question 473023: Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function. F(x) = 4-x^2
What is the vertex? ____ (Type an ordered pair)
What is the equation of the line of symmetry?
X=___
What is the maximum/minimum of f(x)?
Is that value a minimum or maximum?
Draw a picture of a graph that f(x) represents.

Click here to see answer by Tatiana_Stebko(1326)

Question 473045: What do you think are some downfalls or potential easy mistakes when using the quadratic formula?

Click here to see answer by MathLover1(6638)

Question 473045: What do you think are some downfalls or potential easy mistakes when using the quadratic formula?

Click here to see answer by richard1234(5390)

Question 473110: In the quadratic equation ax2 + bx + c = 0, if b2 - 4ac < 0,what is the true equation ?
Click here to see answer by MathLover1(6638)

Question 473167: the difference between the squares of two consecutive integers is 133. what are the integers
Click here to see answer by ewatrrr(10682)

Question 473223: Factor the trinomial

6r^2 +29r -42

Click here to see answer by jim_thompson5910(28598)

Question 473239: Write a quadratic equation having the given numbers as -6 and -1
Click here to see answer by stanbon(57387)

Question 473239: Write a quadratic equation having the given numbers as -6 and -1
Click here to see answer by jim_thompson5910(28598)

Question 473298: Find the variation constant and equation of variation where y varies directly as x a and y =60 when x = 60
Click here to see answer by stanbon(57387)

Question 473213: What is the probability of receiving a 6 or a 9 from a deck of 52 cards and an ace or a king?
suppose to be a percent answer

Click here to see answer by mom+3(3)

Question 473213: What is the probability of receiving a 6 or a 9 from a deck of 52 cards and an ace or a king?
suppose to be a percent answer

Click here to see answer by Alan3354(30993)

Question 473418: The main charater in a video game, Tammy, must swing on a vine to cross a river, If she grabs the vine at a point that is too low and swings within 80 cm of the surface of the river, a crocodile will come out of the riverf and catch her. From where she is standing on the river bank, tammy can reach a point on the vine where her height above the river, h, is modelled by the relation h=6x2-56.8+228, where,x, is the horizontal distance of her swing from her starting point. Should Tammy jump?
Please show steps is crucial
Click here to see answer by ccs2011(207)

Question 473432: Evaluate:
x/y 10 for x= 79 and y= 11

Click here to see answer by Alan3354(30993)

Question 473453: Factor 2x^2 + 11x + 12
Click here to see answer by jim_thompson5910(28598)

Question 473449: -0.4< -32
Click here to see answer by Alan3354(30993)

Question 473447: Find the vertex, the line of symmetry and the maximum or minimum value of f(x). Graph the function.
f(x)=-4(x+8)^2 +2
Click here to see answer by lwsshak3(6522)

Question 473477: find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function.
f(x)=3x^2-18x+24
Click here to see answer by lwsshak3(6522)

Question 472585: Answer the following questions.
Use Equation Editor to write mathematical expressions and equations.
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. ( is the day tickets go on sale).

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?

Click here to see answer by richard1234(5390)

Question 473484: Find the equation of quadratic function that has the given vertex and given point.
Vertex (1,3) passing through (4,8)
Welp,I keep trying and redo-ing the problem, but I don't think I'm coming out with correct answer .
Click here to see answer by lwsshak3(6522)

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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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