Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 443059: How to solve this simultaneous equations
x^= 4 - y
x= y + 2

thank u
AA
Click here to see answer by swincher4391(1107)

Question 443082: Please help me solve this
there is a golden arch.The shape of a maximum quadratic graph. X is the width.Y is the height. X is 245m.y is 300m
I need to know 3 appropriate places that i can put the origin of the arch on a quadratic graph. And I have to state with it, the equation in turning point form (vertex form)
thank you.
I put the origins as (0,0), (-245,0) and(245,0 )
Click here to see answer by stanbon(75887)

Question 443087: Can you help me solve this please
There are 3 equations in turning point form.(vertex form)
y=a(x-0)^2+300 The points on the graph are (0,300)(-122.5,0) and (122.5,0)
y=a(x-122.5)^2+300 The points on the graph are (122.5,300)(245,0) and (0,0)
y=a(x+122.5)^2-300 The points on the graph are (-122.5,300) (-245,0) and (0,0)
Can you please show me how to find the "a".
i Know the answer is -0.02 for all of them but i cant figure out how?
Your help is appreciated.
thanks
Click here to see answer by stanbon(75887)

Question 443089: Please tell me how to solve a problem like: 100x-4000/100x=.3 Solve for x. thank you
Click here to see answer by swincher4391(1107)

Question 443130: Hey guys,
So I was on your website, practicing solving quadratics by completing the square (as you do) and I ran in to a problem. I had done this:

(where the nines are b/2^2)

What do I do now that there's a negative number on the right side? I can't square root both! HELP!!

Click here to see answer by Gogonati(855)

Question 443133: What is the domain and sketch the graph of the reducible function.
f(x) = (x^2 -25) / (2x -10).

Click here to see answer by Gogonati(855)

Question 443132: Quadratic-relations-and-conic-sections/443131 (2011-05-01 05:06:45): I have been trying to solve the below problem for some time now,
Determine the vertical and horizontal asymptotes of f(x) = (x)/(x+2)
I get a (-2) for my Vertical asymptote; but not sure about my horizontal
I get either (1) or (0).
a graph would be helpful.
0 solutions

Click here to see answer by rwm(914)

Question 443134: Determoine the domain and sketch the graph of the reducible function.
f(x) = (x^2 - 25) / (2x - 10).
f(x) = (x+2) / (x^2-x-6).
when I did, the instructor said i was wrong; see his response:
what did i do wrong
The answer to #22, #26 are not correct as you submitted, since in a reducible function, the domain is determined based on the original function, not the reduced form! Please correct and submit.

Click here to see answer by stanbon(75887)

Question 443135: Please help me with this problem I am having a diffcult time with it, Than you so much.
The population P in 1999 for a state given along with r, its annual percentage rate of continuous growth
P= 21 millions, r= 1.9%
(a) Write the formula f(x) = P e^yx, where r is in the decimal notation, that models the population in millions x years after 1999.
(b) Estimate the population in 2020
F(x) = ?
The population in 2020 will be approximately how many million?
(round to the nearest tenth as needed)
Any help is greatly appreciated!!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 443245: beginning with f(x) = squareroot of x, find the function g(x) that shows f(x)
shifted to the left 2 units, reflected about the x axis, and then shifted up
7 units?
Click here to see answer by swincher4391(1107)

Question 443312: What is the quadratic equation?
Click here to see answer by ankor@dixie-net.com(22740)

Question 443383: I need help to see the steps to solving this quadratic equation x^ + 12x � 64 = 0 using the method from India
Click here to see answer by swincher4391(1107)

Question 443454: solve -x�+3x=5
how do i solve this??
Click here to see answer by swincher4391(1107)

Question 443452: solve x�-6x=3
how do i solve this??
Click here to see answer by swincher4391(1107)

Question 443449: solve 3x�+6x+3=0
how do i solve this??
Click here to see answer by swincher4391(1107)

Question 443612: IF AN OBJECT IS TOSSED INTO THE AIR THE PATH OF THIS OBJECT IS REPRESENTED BY THE EQUATION at^2+bt+c=h, where h is the height after t seconds, a is the acceleration due to gravity, b is the initial velocity, and c is the initial height.
Click here to see answer by richard1234(7193)

Question 443650: use quadratic formula
4/5y^2+1/5y=18/5
Click here to see answer by mananth(16946)

Question 443649: use the quadratic formula
1/3x^2-4x+5=0
Click here to see answer by mananth(16946)

Question 443846: Describe how the graph of y=(x-6)^2+5 changes from the parent graph of y=x^2.
A. shifts the parent graph left 6 and up 5
B. shifts the parent graph right 6 and up 5
C. shifts the parent graph left 6 and down 5
Thanks!
Click here to see answer by Alan3354(69443)

Question 443847: what is this algebraically equations using square roots
2x^2-338=0
Click here to see answer by edjones(8007)

Question 443841: x^2-225=0
Click here to see answer by nerdybill(7384)

Question 443856:
Click here to see answer by chriswen(106)

Question 443852: what is this algebraically equations using square root
x^2-16=-25
Click here to see answer by richard1234(7193)

Question 443915: What is the equation in point-slope form of the line passing through (0, 5) and (�2, 11)?
Click here to see answer by ewatrrr(24785)

Question 443834: Find the axis of symmetry for y=x^2-2.
Find the vertex for y=x^2-2.
Thank you!
Click here to see answer by ewatrrr(24785)

Question 443940: 13x^2+14x+13=0
Click here to see answer by chriswen(106)

Question 443940: 13x^2+14x+13=0
Click here to see answer by solver91311(24713)

Question 443972: I am working on quadratic equations, and the following question is confusing me: The height, in feet, of a ball tossed in the air is given by h=-16t2(squared)-10t, where t is the time in seconds. What is the initial height of the ball?
The answer options are:
16ft
-6ft
0ft
10ft
Please help!
Click here to see answer by rwm(914)

Question 444063: x squared+5x+4=0
Click here to see answer by jorel1380(3719)

Question 443848: what is this algebraically equations using square root
x^2-225=0
Click here to see answer by ankor@dixie-net.com(22740)

Question 444134: John owns a hot dog stand. he has found that his profit is represented by the equation P(x)=-x2+60x+71, with P being the profits and x the number of hot dogs sold. How many hotdogs must he sell to earn the most profit?
Click here to see answer by edjones(8007)

Question 444131: i need help on the steps to sloving a quadratic function..... f(x)= 2x squared
Click here to see answer by edjones(8007)

Question 444153: If the area of a rectangle is 91m^2, and the dimensions are (x+2)m and (2x+3)m what is the value of x. I need to use the quadratic equation to find the value of x.
Click here to see answer by mananth(16946)

Question 444321: The length of a rectangle is 23 centimeters less than six times its width. Its area is 35 square centimeters. Find the dimensions of the rectangle.
The width is ? cm.
Click here to see answer by jorel1380(3719)

Question 444327: The sum of a number and its square is 42. Find the number(s).
The number(s) is/are ?. (use a comma to separate answers as needed)

Click here to see answer by jorel1380(3719)

Question 444397: quadratic equations, which are expressed in the form of ax^2 + bx + c=0, where a does not equal 0, may have how many solutions? explain why.
Click here to see answer by poliphob3.14(115)

Question 444490: I need so much help with solving quadratic equation by factoring!
1) 4x2 + 27x - 7=0

Click here to see answer by rwm(914)

Question 444023: can i ask you to help me with a problem ?
Click here to see answer by rwm(914)

Question 444500: A rectangular movie screen has an area of 9,315 square feet. Find the dimensions of the screen if it is 18 feet longer than it is wide.
Click here to see answer by chriswen(106)

Question 444559: Please help me solve this equation to find out the axis of symmetry and the vertex: x^2-10x+17
Thankyou(:
Click here to see answer by rwm(914)

Question 444559: Please help me solve this equation to find out the axis of symmetry and the vertex: x^2-10x+17
Thankyou(:
Click here to see answer by stanbon(75887)

Question 444288: 3x^2-6x=1
Click here to see answer by rwm(914)

Question 444589: 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?
Click here to see answer by stanbon(75887)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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