Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 119362: |-6| + 3|4| + |-5| -0 . 6 =
Click here to see answer by ikleyn(53942)

Question 119362: |-6| + 3|4| + |-5| -0 . 6 =
Click here to see answer by ikleyn(53942)

Question 207055: Hi all, I was hoping to get some help with the following problem.
Find ∆y/∆x (given the following information)
b) y = sqrt(x), x=9, ∆x= 0.9
Any help would be great.
-Nick.
Click here to see answer by ikleyn(53942)

Question 212707: Calculate the density of a block of wood which weighs 750kg and has the dimensions 25cm X 0.10m X 50.0m
Click here to see answer by ikleyn(53942)

Question 214026: solve the equation: square root of 3q+1 - the square root of q-1 =2
Click here to see answer by ikleyn(53942)

Question 94042: I am having trouble with solving by substitution. Please help.
5x-2y=-5
y-5x=3
Click here to see answer by MathTherapy(10858)

Question 971803: For the equation
cos(5 x) = −1
find the smallest solution, the largest solution and the number of solutions for x in the interval 0 ≤ x ≤ 2π.
2dp
Click here to see answer by ikleyn(53942)

Question 1164583: F(x)= {x^2 for <(with line underneath< )-3
9-x^2 for -3< x < ( with line underneath<) 3
X^2 for x>3
Find f(-3)
Find f(3)

Click here to see answer by CPhill(2264)

Question 46738: Expand the binomial: (3-y)^3

Click here to see answer by ikleyn(53942)

Question 53415: What is -y + 10 = 25? I did:
-y + 10 = 25
-25 -25
-y = -15
-1(-y) = -1(-15)
y = 15
Am I right?
Click here to see answer by MathTherapy(10858)

Question 53415: What is -y + 10 = 25? I did:
-y + 10 = 25
-25 -25
-y = -15
-1(-y) = -1(-15)
y = 15
Am I right?
Click here to see answer by ikleyn(53942)

Question 297126: I cannot solve this equation: t^2 - 1/6 = 35/6. Thank you for any help.
Click here to see answer by josgarithmetic(39838)

Question 297126: I cannot solve this equation: t^2 - 1/6 = 35/6. Thank you for any help.
Click here to see answer by ikleyn(53942)

Question 299199: An airplane took 4 hours to fly 1200 miles agianst a headwind.The return trip with the wind took 3 hours. Find the speed of the plane in still air and the speed of the wind. What is the speed of the wind in still air? What is the wind speed?
Click here to see answer by ikleyn(53942)

Question 284713: How do I eliminate the fractions in the following problem: 1/5x - 3/5x =2 and 2/5x + 4/5x =3
Click here to see answer by ikleyn(53942)

Question 275827: Solve for x.
(x+1)(x+3)(x+5)(x+7)=-15
I've worked this numerous times and get lost every time. Please explain how to find x.
Click here to see answer by n2(91)

Question 275827: Solve for x.
(x+1)(x+3)(x+5)(x+7)=-15
I've worked this numerous times and get lost every time. Please explain how to find x.
Click here to see answer by ikleyn(53942)

Question 263280: Given the equations 3x + y = 17, 5y + z = 14 and 3x + 5z = 41, what is the value of the sum x + y + z?
Click here to see answer by ikleyn(53942)

Question 261692: please help need this one problem solved asap.
solve for x if the perimeter is 32.

one side of the weird looking triangle is 3,the other side is
x+7,and on the bottom is 2x-2 please someone help me..
Click here to see answer by ikleyn(53942)

Question 1115269: Meisha has $25,000 that she wants to invest. She invests it in accounts paying 12%, 7%, and
6% simple interest. The account paying 12% is a higher-risk account, so she wants the
amount in that account to be half of the amount she has in the account paying 6% simple
interest. If her annual interest is $1945, how much is invested at each rate?
Click here to see answer by josgarithmetic(39838)

Question 964216: if 8 men can do a job in 12 days how long will 24 men take to complete it

Click here to see answer by MathTherapy(10858)

Question 1179662: Divide 75 into two parts so that one part is 2/3 of the other.
Click here to see answer by n2(91)

Question 1179662: Divide 75 into two parts so that one part is 2/3 of the other.
Click here to see answer by ikleyn(53942)

Question 356826: Hi, I was wondering if someone could help me. I have no idea how to complete this problem, and I need to show my work (steps). So, if anyone has any help they can provide, I would greatly appreciate it. Thank you.
Simplify

cubrt(27x^4y^10).

Explain your answer and show all steps.
Click here to see answer by MathTherapy(10858)

Question 1164822: Find the equation of the least squares regression line (line of best fit). Note: Use the number of phones sold in the month of February as the independent variable, x, and the commission on those sales as the dependent variable, y. (No work required.)

b. State the value of the correlation coefficient r and comment on the goodness of fit.

Plans sold(x) Commission(y)
14. 243
16. 312
17. 279
18. 308
11 199
15. 219
23. 504
24. 550
14. 260
17. 255

Click here to see answer by CPhill(2264)

Question 454369: Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b
(-6,7); 2x=9y+8
Click here to see answer by ikleyn(53942)

Question 454379: Find an eaution of the line containing the given pair of points.
( - 7, - 9) and ( - 4, - 8)
Click here to see answer by ikleyn(53942)

Question 451061: Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form Y=MX+b.
(-3,3);4x=5y+6
The equation of the line is Y=
(Simplify your answer. Use integers or fractions for any numbers in the expression)
Click here to see answer by josgarithmetic(39838)

Question 448337: What is the answer to this equation 2x/5 = 4+2/3 ? If Not the answer how do i solve this equation?
Click here to see answer by josgarithmetic(39838)

Question 448337: What is the answer to this equation 2x/5 = 4+2/3 ? If Not the answer how do i solve this equation?
Click here to see answer by ikleyn(53942)

Question 447396: I need help writing the slope-intercept equation for the line that passes through (-3, -15) and is perpendicular to -6x + 8y = 3. Thank you.
Click here to see answer by ikleyn(53942)

Question 447238: 30% of the tickets sold by a movie theater were children's tickets at $4 ea. The rest of the tickets were sold at the full price of $8.50 ea. The theater collected $252 for the childrens tickets. How many tickets did they sell in all?
Click here to see answer by josgarithmetic(39838)

Question 730128: ind the effective rate corresponding to the given nominal rate. (Assume a 365-day year. Round your answer to two decimal places.)
7%/year compounded semiannually

Click here to see answer by ikleyn(53942)

Question 61355: 3/4n + 5 = 2/5n
Click here to see answer by MathTherapy(10858)

Question 732178: Given n=74 and x=32. Find ^ and ^
p q
Click here to see answer by ikleyn(53942)

Question 732220: How much water does it take to completely fill a pool that is 40 m long, 25 m wide, and 2 m deep?
m3
Click here to see answer by ikleyn(53942)

Question 733033: K squared minus 8K minus 48 equals 0

Click here to see answer by ikleyn(53942)

Question 733074: The maximum weight for an elevator is 750 kg. 2 occupants enter the elevator, 1 weighs 110lb and the other is 230lb. What is the linear equation and how do I graph it/
Click here to see answer by timofer(159)

Question 666240: I am having a problem with this equation and don't seem to solve it.
the problem is to solve the equation:
(x-10)2/5 = (9x)1/5

Click here to see answer by timofer(159)

Question 666240: I am having a problem with this equation and don't seem to solve it.
the problem is to solve the equation:
(x-10)2/5 = (9x)1/5

Click here to see answer by josgarithmetic(39838)

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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14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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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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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, 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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, 41581..41625, 41626..41670