Questions on Algebra: Equations answered by real tutors!

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Question 197817: Find a function whose graph is the line segment joining the points (-2, 7) and (1, -2)
f(x) = ?
Thanks! Appreciate the help!
Click here to see answer by arallie(162)

Question 198474: Hi!
Solve the equation (1+sqrt(x))^2-2(1+sqrt(x))-15=0
thanks!

Click here to see answer by arallie(162)

Question 198474: Hi!
Solve the equation (1+sqrt(x))^2-2(1+sqrt(x))-15=0
thanks!

Click here to see answer by MRperkins(300)

Question 195782: evaluate 2x-y if x=1/3 and y= 3/5
Click here to see answer by arallie(162)

Question 195779: -3/7+(-5/21)=
Click here to see answer by arallie(162)

Question 195776: add 3 1/4 +2 2/3
Click here to see answer by arallie(162)

Question 195792: 0.5x=8.5 - (-1.25)
Click here to see answer by arallie(162)

Question 195785: x/3+1x=-12
Click here to see answer by arallie(162)

Question 198493: how do you solve this system of equation
x+y=8
51x+8y=193
Click here to see answer by nerdybill(7384)

Question 198567: 2b+9=3
Click here to see answer by jim_thompson5910(35256)

Question 198602: The difference of 2 numbers is 152. Solve
Click here to see answer by arallie(162)

Question 198617: | 2x+7 | <3
Click here to see answer by edjones(8007)

Question 198669: a)4x+3=13
b)2(x-1)=3(x+4)
Click here to see answer by jim_thompson5910(35256)

Question 198675: -[3x-(2x+5)]=-4-[3(2x-4)-3x] i need to see how this is done step by step to understand better.
Click here to see answer by jim_thompson5910(35256)

Question 198735: Find the next two numbers in the sequence 243,81,27,9 .....
Click here to see answer by solver91311(24713)

Question 198746: The description described below is what I need to do for the problem on Page 485/32 it's the section at the back of the book SECTION 8.1 appendex. PLEASE HELP!!!!
Find an equation of each line. Write the equation using function notation.
Click here to see answer by jim_thompson5910(35256)

Question 198516: Hi Good Day to all of you.
Please help me derive this formula:
ax^2 + bxy + cy^2 + dx + ey + f = 0

Thank you!
Click here to see answer by solver91311(24713)

Question 198836: A firm prints advertising leaflets. They have a set-up fee of �100 and charge 5p per leaflet. Explain in words how to find the total cost of printing N leaflets. Hence explain why the total cost �(C) is given by the formula
C = 100 + 0.05N.
I am sorry to ask for help but I have never been very good with algebra and I am still awaiting a battery for my TI84.
Click here to see answer by jim_thompson5910(35256)

Question 198843: For each of the following expressions, simplify by expanding any brackets and collecting like terms. Show all the steps in your working.
(a) 4x +7 − 3x − 2
(b) 5(3 − 2x)
(c) 7(2y +1) − 3(4 − y)
(d) (N − 2)(2N +3)
(e) (4x − 3)^2
(f) 8-12p/4 + 4p

Click here to see answer by user_dude2008(1862)

Question 198874: How do i answer these questions? I am trying to help my daughter and can't remember.
2(x+4)+3x=12

On the next one, I can't remember if add the opposite would be add positive 5 to negative 17, yielding 12 or if it would be add -5 yielding -22
3/4x-5=-17

How do I answer?
2(m-3)=5(2m-6)

When do you need to reverse the inequality sign when you solve an inequality?
Click here to see answer by jim_thompson5910(35256)

Question 198875: if 18-3(5-x)=x-7, then x=?
Click here to see answer by jim_thompson5910(35256)

Question 198896: Solve for y in terms of a, b, and c:
by+a=c
Click here to see answer by jim_thompson5910(35256)

Question 198894: A basketball player scored x,y, and z points on three games. Express the average number of points scored by the player in terms of x, y, and z.
Click here to see answer by jim_thompson5910(35256)

Question 198891: If tan A=0.1988, find the measure of angle A to the nearest degree.
Click here to see answer by Alan3354(69443)

Question 198917: What is the positive root of the equation 3x�-27=0?
1)9
2)-9
3)3
4)-3
Click here to see answer by anantha(86)

Question 198882: if x+y=9 and y-x=7, then x^2+y^2= ?
Click here to see answer by radikrr(7)

Question 198884: what is the value of f(-2) when F(x)=(3x-1)(x^2-10x+6)?
Click here to see answer by checkley75(3666)

Question 198880: if 4x-3y=11 and -5x+2y=-12, then the solution (x,y) is?
Click here to see answer by pannalal(9)

Question 198951: -7(n+9)-(7+2n)=-10n ,Solve for n
Click here to see answer by jim_thompson5910(35256)

Question 198952: Hello!
Use the Laws of Logarithms to combine the expression.
log(x) + 1/4log(x^2+1)+5log(x-1)
thanks for your help!
Click here to see answer by jim_thompson5910(35256)

Question 198881: if m=2, a=7 and r=4 what is the value of am^2+r^3/2 ?
Click here to see answer by bsmath(21)

Question 199013: If three times a number is increased by 6, the result is 21. The number is
1)5
2)9
3)15
4)-9
Click here to see answer by AbyBavy(4)

Question 199102: A freight train left New York City traveling north at a rate of 40 miles per hour. Two hours later, a passenger train left the same station traveling north over the same route at the rate of 60 miles per hour. How many hours did it take the passenger train to overtake the freight train? (Only an algebraic solution will be accepted.)
Click here to see answer by Alan3354(69443)

Question 199091: Solve for y in terms of a, b, and c:
by+a=c

Click here to see answer by Alan3354(69443)

Question 199107: A ball is dropped from a height of 64 feet. Its height above the earth in feet is given by h(t ) = -16t2 + 64, where t is the number of seconds after it is dropped. Find h(1). How long does it take for the ball to fall to the earth?
Click here to see answer by Alan3354(69443)

Question 199109: A freight train left New York City traveling north at a rate of 40 miles per hour. Two hours later, a passenger train left the same station traveling north over the same route at the rate of 60 miles per hour. How many hours did it take the passenger train to overtake the freight train? (Only an algebraic solution will be accepted.)
Click here to see answer by josmiceli(19441)

Question 199096: A. Perform the indicated operation and express the result in simplest form:
3x+24 over x+2 times x�-6x-16 over x�-64
B. Solve for x: x+4 over 2 plus 2x over 3 equals 9
Click here to see answer by ankor@dixie-net.com(22740)

Question 195979: 72 books to 284 books using fraction notation and put into siplest terms
Click here to see answer by sunsunny3235(5)

Question 199181: A chemist mixed some 15% peroxide solution with some 6% peroxide solution to make 300ml of a 9% peroxide solution. How many milliliters of the 15% solution were used?
Click here to see answer by nitin.thacker(3)

Question 195983: using fraction notation and simplest terms
1/3 in to 5/6 in
Click here to see answer by Alan3354(69443)

Question 199408: -6(x + 1) + 4=16
Click here to see answer by jim_thompson5910(35256)

Question 199450: Two polynomials P and D are given. Use either synthetic or long division to divide P(x) by D(x), and express P in the form P(x) = D(x) � Q(x) + R(x).
P(x) = x^3 + 9x^2 - 8x + 1, D(x) = x - 9
Thanks for the homework help!
Click here to see answer by vleith(2983)

Question 199449: Show that the given values of c are zeros of P (x), and find all other zeros of P (x).
P (x) = 2x^4 - 5x^3 - 24x^2 - 7^x + 10; c = 1/2, -2
Thank you for the homework help!
Click here to see answer by vleith(2983)

Question 199527: I'm taking a college algebra class. I have not had any algebra experience in over 20 years, so I'm very rusty. My first problem is below. I think that I solved it, but I would like input from you to see if I'm on the right track.
Problem:
16-2x+5=5x Here's what I did: 16-2x+2x+5=5x
16+5=5x+2x
21=7x
21/7=7x/7
3=x
Please let me know if the steps to solving this are correct and if the answer is correct.
I have a few other problems.
A. 4(y-1)=2(3+y) I don't remember how to do problems w/ parentheses.
B. 2/3-x/6=1
C. 0.2(x-4)=3
Any help you can offer to get me started in the right direction is appreciated. Thanks for your time and assistance.
Click here to see answer by Alan3354(69443)

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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7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 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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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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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