Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 419010: Graph the following line. (Do this on paper. Your instructor may ask you to turn in this graph.)
y=1/4x+4
Name the slope and y-intercept by looking at the graph.
Slope
m = ?
y-intercept
b = ?
Click here to see answer by dnanos(83)

Question 419091: Can someone please help me? I have been working on this for a while and yet to come up with an answer.
Let f(x)=x+4 and g(x)=x^-x.
Find and simplify the expression. (f+g)(2)
(f+g)(2)=__________(Simplify your answer.)
Let f(x)=x^-16 and g(x)=4-x.
Click here to see answer by dnanos(83)

Question 419098: Please help!
Identify the vertex of the graph of the quadratic function.
f(x)=(x-2)to the second power.
The vertex of the quadratic function is the point__________.
(Type an ordered pair.)
Click here to see answer by edjones(7569)

Question 419097: Write the quadratic function in vertex form then graph the function. y=2x^2-2x+1
this is what i have so far y=-2(x-2)+1
I don't really know how to tell what is h and what is k.
Click here to see answer by lwsshak3(6516)

Question 419087: Ust the value of the discriminant to determine the number and type of roots for x^2-4x=21
Click here to see answer by lwsshak3(6516)

Question 419111: Identify the vertex of the graph of the quadratic function. f(x)=(x+1)^2 -3
The vertex of the quadratic function is the point_____________.

Click here to see answer by ewatrrr(10682)

Question 419020: Graph the line that passes through the points (-1, 3) and (9, -7)? (Do this on paper. Your instructor may ask you to turn in this graph.)
What are the x- and the y-intercepts for this line?
x-intercept
a = ?
y-intercept
b = ?
can you show me the steps?
Click here to see answer by ewatrrr(10682)

Question 419014: For each equation in the table, give the slope of the graph. (If the slope of the graph undefined, enter UNDEFINED.)
EQUATION SLOPE
x = -4 ?
y = -4 ?
y = -4x ?
Click here to see answer by ewatrrr(10682)

Question 419182: please help me solve this equation? 33x^2=-11x
Click here to see answer by sudhanshu_kmr(1152)

Question 418856: by using quadratic system of equations solve each system by substitution.
{y=2x^2-5x+3
{y=x-2 both are one problem

solve each system by graphing:
{y>2x^2+x+3
{y<-x^2-4x+1

{y=-x^2+2x+1 same as before
{y=2x+1
solve each system by graphing:
{y>x^2+2x
{y>x^2-1

Click here to see answer by ewatrrr(10682)

Question 419190: I need help to solve this problem 8/x+2+8/x-2=3
Click here to see answer by algebrahouse.com(1079)

Question 419193: I need help solving this problem using the quadratic formula and need to leave the answer in the radical form? very confused x^2+6x-1=0
Click here to see answer by ewatrrr(10682)

Question 419110: Please help me! These are two separate problems.
Let f(x)=x+4 and g(x)=x^2 -4.
Find and simplify the expression. (f+g)(2)
(f+g)(2=_________ (Simplify your answer.)
Let f(x)=x^2 -16 and g(x)=4-x.
Find (fg)(-3).
(fg)(-3)=____________
Click here to see answer by ewatrrr(10682)

Question 419186: I need help to solve this by factoring? 2x^2-11x+15=0
Click here to see answer by ewatrrr(10682)

Question 418795: I need to see the steps to solving this quadratic equation x^2-2x-13=0 using the method from India and these equations also.
4x^2-4x+3=0
x^2+12x-64=0
2x^2-3x-5=0
Click here to see answer by ewatrrr(10682)

Question 419187: I need help solving this problem? y(9+y)=4(2y+5)
Click here to see answer by Mr. Math Wiz(7)

Question 419121: The following function is one-to-one.
Find the inverse of the function and graph the function and its inverse on the same set of axes. f(x)=x to the third power -7

Click here to see answer by Theo(3464)

Question 419414: 2x(x+3)=-5x-15
*use factoring to solve the quadratic equation
Click here to see answer by MathLover1(6634)

Question 419395: Graph the line with x-intercept 8 and y-intercept 4. (Do this on paper. Your instructor may ask you to turn in this graph.)
What is the slope of this line?
m = ?
Click here to see answer by rfer(12666)

Question 419456: how do i solve, solve equation, for equation with real solutions, support answer graphically.
(3x-1)^2 = 12
Click here to see answer by stanbon(57377)

Question 419440: Suppose you have 80 ft of fence to enclose a rectangular garden.The function A=40x-x^2 gives you the area of the gardne in square feet where x is the width in feet.
a. What width,x, gives you the maximum garden area?
b. what is the maximum area?
Click here to see answer by Gogonati(809)

Question 419407: -Applications of Quadratic Equations
during a bicycle race, suppose that on one particular day, the racers must complete 210 mi. One Cyclist, traveling 10 mph faster than the second cyclist, covers this distance in 2.4 h less time than the second cyclist. Find the rate of the first cyclist.
I am so confused on how to do word problems dealing with quadratic equations...
please email me asap!
Thank you so much
Click here to see answer by josmiceli(9695)

Question 419447: Find (f+g)(x),(f-g)(x),(fg)(x),and their domains.
f(x)=x+3,g(x)=x-3
(f+g)(x)=
(Simplify your answer.)
Click here to see answer by Gogonati(809)

Question 419704: Please help me out!
Let f(x)=x to the second power -16 and g(x)=4-x.
Find (fg)(-3).
(fg)(-3)=
Click here to see answer by Theo(3464)

Question 419764: solve using the quadratic formula and leave the answer in radical form? Could you show work as I am very confused. Thanks.
Karyn
y^2+6y-1=0
Click here to see answer by Alan3354(30993)

Question 419779: subtract and simplify
1/s+1 - s^2/s+1=
hi, i need to subtract this,both denominators are the same which is good.
i end up with 1-s^2/s+1.....
when you simplify i get s-1 for an answer but not 100% sure if doing this right..can someone confirm this.
(s+1)(s-1) / s+1
Click here to see answer by Theo(3464)

Question 419820: How to use the zero-factor property when solving a quadratic equation.
Click here to see answer by MathLover1(6634)

Question 420061: How do you use the zero-factoring property when solving a quadratic equation?
Click here to see answer by MathLover1(6634)

Question 420112: Solve using the quadratic formula and leave the answer in radical form:
y^2+6y-1=0
Click here to see answer by rfer(12666)

Question 420127: i need help finding the axis of symmetry and vertex of the function f(x)=-2x^2, im confused because it doesnt give me B nor C only A.
Click here to see answer by dnanos(83)

Question 420127: i need help finding the axis of symmetry and vertex of the function f(x)=-2x^2, im confused because it doesnt give me B nor C only A.
Click here to see answer by Earlsdon(6287)

Question 420301: I need help solving this quadratic equation and leaving it in radical form I don't know how to set it to zero? I know how to use the quadratic formula so I need help on how to set the equation to zero so I can solve using the quadratic formula? (x+8)(x-4)=-3(2x+5) thank you for your help
Click here to see answer by mananth(12270)

Question 420393: Solve: 8/(x+2)+8/(x-2)=3
Click here to see answer by Gogonati(809)

Question 420561: Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
14x-2y=6
7x-y=3
x = ?
y = ?
Click here to see answer by sudhanshu_kmr(1152)

Question 420565: Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
x+y=9
x-y=1
x = ?
y = ?
Click here to see answer by sudhanshu_kmr(1152)

Question 420566: Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
x+y=10
-x+y=6
x = ?
y = ?
Click here to see answer by sudhanshu_kmr(1152)

Question 420563: Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
3x-21y=6
x-7y=8
x = ?
y = ?
Click here to see answer by sudhanshu_kmr(1152)

Question 420591: a father and son are chatting when the son poses this question "Dad,Im 22 but just how old are you? the father replies,"You want to know how old your old man is,eh? Hmm, well, I tell you what. im as old as your age, plus half of my age."
How old is the father? explain.
Click here to see answer by ankor@dixie-net.com(15658)

Question 420735: 12x^2-18x-6
i used the -b +- square root of b^2-4ac over 2a formula, but i dont know if my answer is right.
Click here to see answer by stanbon(57377)

Question 420491: when solving quadratic equations, you can solve by using the quadratic folmula, or completing the square or factoring. What are the pros and cons of each. When might each method be most appropriate?
Click here to see answer by richard1234(5390)

Question 420797: State the value of the discriminant, and the describe the nature of solutions:
-4x^2-5x+4=0
A. The equation has two real solutions
B. The equation has one real solution
C. The equation has two imaginary solutions
Click here to see answer by ilana(307)

Question 420802: can you help me graph this equation x^2+2x+5
Click here to see answer by stanbon(57377)

Question 420850: Hi, I'm having issues understanding a quadratic equation that was given to me as an example. I do not under stand the second line and how they got to it. Could someone please explain it or show the steps that were taken to get there.
The equation is d^2-7d+9=0. Here are the steps I was given.
d^=7d-9
d^2-7d+9=0
d=(7+_ Square root of 49-4(9)) divided by 2
d=(7+_squareroot of 49-36)/2
d= (7+- squareroot of 13) /2
Now I can see how step 1 to 2 is done that is simple and I can see how it goes from step 4 to the answer but I can not understand how to go from step 2 to step 3.
I have tried it myself. here is what I keep getting.
d^2=7d-9
d^2-7d+9=0
d(d-7)+9=0
d(d-7)=-9
d-7=-9/d
d=-9/d+7
2d=-9+7
2d=-2
d=-1
I know my answer is incorrect, Please Help me
Click here to see answer by mananth(12270)

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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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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