Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 82585: I have to solve this: √x-1=x-3
This is what I have done so far. Am I on the right track? What do I do now?
"The radical symbol is only over the x-1"
√x-1=x-3
(√x-1)^2=(x-3)^2
x-1 = (x-3)(x-3)
x-1 = x^2-6x+9
x-1 = x^2-6x+9
0=x^2-7x+10

Click here to see answer by ptaylor(2198)

Question 82462: Please help if possible!Thanks
1. A right triangle is a triangle with one angle measuring 90�. In a right triangle, the lengths of the sides are related by the Pythagorean Theorem c^2=a^2+b^2.where c is the length of the hypotenuse (the side opposite the 90� angle). Find the length of the hypotenuse when the other two sides� measurements are 3 feet and 4 feet.
2.For the equation x-sqrt(x)=0 perform the following:
a)Solve for all values of x that satisfies the equation
Graph the functions y=x and y=sqrt(x) on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs.
Thanks again!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 82662: find the vertex and x-intercepts of the parabola described by the equation:
y=(x+12)(x-2)
Click here to see answer by stanbon(75887)

Question 82661: x(squared)+3x-40=0
Click here to see answer by stanbon(75887)

Question 82675: m^8/6 multiplied by 12/m^11 then simplify
Click here to see answer by stanbon(75887)

Question 82728: Which expression cannot be rewrittin using distributive property?
f 3(2+8)
h (18-9)7
g 5(2*33)
i 9(14-6)
Click here to see answer by stanbon(75887)

Question 82728: Which expression cannot be rewrittin using distributive property?
f 3(2+8)
h (18-9)7
g 5(2*33)
i 9(14-6)
Click here to see answer by rapaljer(4671)

Question 82706: (4/x)-(3/(x+1))=7 slove for x
Click here to see answer by stanbon(75887)

Question 82734: N=F+d(n-1) Solve for N
Click here to see answer by rapaljer(4671)

Question 82738: if i =radical 1, evaluate (-15i)^2
Click here to see answer by rapaljer(4671)

Question 82831: Can anyone help with this problem
Which of the ordered pairs (-4, 2), (6,)), (-9, -3), (-14, 4) are solutions for the equation x+5y=6 and show work?
Click here to see answer by Earlsdon(6294)

Question 82850: when using the quadratic formula to solve a quadratic equation (ax^ + bx + c = 0), the discriminant is b2 - 4ax. This discriminant can be positive, zero, or negative.
Create three unique equations where the discriminat is positive, zero, or negative. For each case, explain what this value means to the graph of y = ax^ + bx + c.
Click here to see answer by Edwin McCravy(20054)

Question 82883: Solve x+5=7
Click here to see answer by sofiyacherni(99)

Question 82882: Add 11+(-15)
my choices are:
(a)26
(b)-4
(c)4
(d)-26
I would like to see how the equation is solved, Please and Thank You
Click here to see answer by sofiyacherni(99)

Question 82948: Eight less than six times a number is 104. Find the number.
Click here to see answer by sprolden(40)

Question 82788: Can someone assist me with this problem?
The volume of a cylinder (think about the volume of a can) is given by V = πr2h where 'r'is the radius of the cylinder and 'h' is the height of the cylinder. Suppose the volume of the can is 100 cubic centimeters.
a)Write h as a function of r. Keep "n" in the function's equation.
b)What is the measurement of the height if the radius of the cylinder is 2 centimeters? Round your answer to the nearest whole number.
c)Graph this function.
Thank you for your help...
Click here to see answer by ankor@dixie-net.com(22740)

Question 82954: If the equation y = 5 + 6x were graphed, the slope would be would be:
Click here to see answer by tutorcecilia(2152)

Question 82953: If the equation y = 5 + 6x were graphed, the slope would be would be:
Click here to see answer by checkley75(3666)

Question 83057: Alrighty . . . the problem is stated as: For f(x) = 5x � 4, find f(-1).
The way I see this in my head is the answer is 0. However I think it might not be but I can't figure out how to proceed, I just see zero as the solution. Can you help please.
Click here to see answer by scott8148(6628)

Question 83068: First of all you guy's are fantastic! Here is my last one:
(x^4+3x^2-1)(x^2-x+2) instructions are to multiply
Click here to see answer by stanbon(75887)

Question 83164: This one is tough for me, any help is appreciated:

Click here to see answer by Mona27(45)

Question 83188: 3x-12=12
Click here to see answer by tutorcecilia(2152)

Question 81994: Simplify.
√20/5 � 1/√5
I keep coming up with they cannot be simplified.
Is it right?
Click here to see answer by Mona27(45)

Question 83184: 4x-4=12
Click here to see answer by checkley75(3666)

Question 83282: Can someone please help me with this. It is probably some thing simple that I am overloking but this is beating me down. The numbers arent relavant here that's why i did not include them i am just trying to understand the correct way to write the equation in order to solve first for [Rm], I was provided with a number to reprsent 'Ra, Rf, and B'. and secondly I meed to know how to write the equation to solve for [Rf] with the known information being 'Ra, Rm,and B'. The equation i am starting out with is: So the question is how do i write the equation to solve for Rm and also for Rf using this equation as the base:
Ra = Rf + B(Rm - Rf).

Click here to see answer by stanbon(75887)

Question 83303: Can you help me with this problem?
For the equation x � radical sign and the radicand under it of x = 0, perform the following:
Solve for all values of x that satisfies the equation.
Graph the functions y = x and y = radical sign and the radicand under it of x on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs.
Graph
How does the graph relate to part a?

Click here to see answer by stanbon(75887)

Question 83329: How do you solve 12r-18=13r+18
Click here to see answer by jim_thompson5910(35256)

Question 83342: what is the sum of:
x+1 and 3x
___ ___
x+3 x-4
Click here to see answer by stanbon(75887)

Question 83490: I am in a world of hurt, this is throwing me off.
Janet invested $25,000 part at 5% and part at 2%. If the total interest at the end of the year $980, how much did she invest at 5%
A.$16,000
B.$9,000
C.$15,000
D.$17,000
please help
Click here to see answer by rapaljer(4671)

Question 83547: i have a question i am trying to do my homework but i dont know if i am doing this right
7x=t
I DIVIDED EACH SIDE BY SEVEN AND I GOT t over 7
Click here to see answer by praseenakos@yahoo.com(507)

Question 83607: I am trying to solve the problem 6b+14=-7-b. I came up with the answer of -3. Is that correct? What's throwing me off is this, shouldn't I be able to plug the -3 into the b and both sides of the equation be equal?
Click here to see answer by jim_thompson5910(35256)

Question 83612: I have one more equation that I am having problems with. Once again, the answer I came up with does not seem to work when I am trying to check it. The problem is as follows:
8z+2=2(z-5)-z
I come up with an answer of 1.7, but I cannot get the check to work out. Is my answer correct?
Click here to see answer by dolly(163)

Question 83688: Find the x-intercepts.
y = x^2 � 4x + 4
I came across this and I was wondering how these are done? Can someone show me please?
Click here to see answer by josmiceli(19441)

Question 83688: Find the x-intercepts.
y = x^2 � 4x + 4
I came across this and I was wondering how these are done? Can someone show me please?
Click here to see answer by stanbon(75887)

Question 83695: write an equation that has a root of 3+i
Click here to see answer by Edwin McCravy(20054)

Question 83713: Solve by Factoring: 3x^2 = -9x
What are the solutions for x?

Click here to see answer by stanbon(75887)

Question 83713: Solve by Factoring: 3x^2 = -9x
What are the solutions for x?

Click here to see answer by funmath(2933)

Question 83719: x to the second power - 16y to the second power.
x^2-16y^2
factor this out:
(x-4y)(x+4y)---Your answer!
Check your answer: FOIL Method
x^2+4xy-4xy-16y^2= x^2-16y^2
Click here to see answer by lekelly(20)

Question 83827: Solve by using the quadratic formula.
x^2 = �7x + 12
Click here to see answer by josmiceli(19441)

Question 83827: Solve by using the quadratic formula.
x^2 = �7x + 12
Click here to see answer by Earlsdon(6294)

Question 83838: The length of a rectangle in 6cm longer than the width. Its perimeter is 56. Find the width and lenght......How do I fiqure this out ?
Click here to see answer by josmiceli(19441)

Question 83837: 1/3 - x/5 = 1/2 - x/10
Click here to see answer by jim_thompson5910(35256)

Question 83905: 5a=a need to know formula for this answer missed math class today and i am having trouble thanks
Click here to see answer by jim_thompson5910(35256)

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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30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580