Questions on Algebra: Equations answered by real tutors!

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Question 751608: Rosa has designed a pulley system for a school science project. She has determined that as the coefficient of friction increases, the efficiency of the pulley decreases. With a coefficient of friction of 0.2, the efficiency of the pulley is 75%. What would you expect the efficiency to be if the coefficient of friction increased to 0.3?
Click here to see answer by Theo(13342)

Question 751647: 3x-9=4(x-1). X=5
Click here to see answer by Yanisleysi (5)

Question 750842: What's the x-intercept and y-intercept of the equation 2y+x= 12
Click here to see answer by Yanisleysi (5)

Question 751655: Write the expression for two times the sum of p and 10?
Click here to see answer by MathLover1(20849)

Question 751603: If y varies inversely as the square of x and y = 4 when x = 3, find y when x is 2.
Click here to see answer by Cromlix(4381)

Question 750868: This was the first problem I had. I do not understand equations whatsoever. Not two-part equations, not one-part equations, not any equation! Please help me!
First, I tried:
(1/3)(9x-12)=4x-9
1/3(9x)-1/3(12)=4x-9
(3x-4)=4x-9
3x-4x=-1x
4x-4x=0
-1x-4=-9
-9+4=-5
-1x=-5
x=-5
I got this question wrong, but I don't know how!
Thank-you for your time,
Sarah

Click here to see answer by Yanisleysi (5)

Question 751627: what is the value of y 15-y =15+y
Click here to see answer by Yanisleysi (5)

Question 751711: what is 5(d+4) = 7(d-2)
Click here to see answer by tommyt3rd(5050)

Question 751784: (6p + 11)(6p - 11)
Find the product.

Click here to see answer by stanbon(75887)

Question 751868: 5n-6=8n+6
Click here to see answer by Cromlix(4381)

Question 751899: solving equation
24-3(6-3x)=11/4x
Click here to see answer by josh's girl(7)

Question 751995: 2n+12n=2(n+12)
Click here to see answer by tommyt3rd(5050)

Question 752042: 17.791X + .11248Y = .19497Y
What is X and What is Y
Click here to see answer by solver91311(24713)

Question 752119: Can you help my kid to solve this with steps
Thank you
-8(4+9x)=7(-2-11x
Click here to see answer by unlockmath(1688)

Question 752119: Can you help my kid to solve this with steps
Thank you
-8(4+9x)=7(-2-11x
Click here to see answer by josmiceli(19441)

Question 752127: solve the simultaneous equation x+y = 14
xy = 45
Click here to see answer by unlockmath(1688)

Question 752166: if 25% of x=2Y and 30% of y=24 what is X

Click here to see answer by kibauu(44)

Question 752189: The number of solutions for square root of (5x+7) - sq. root of (3x+1) = sq. root of (x+3)
Click here to see answer by malglu(63)

Question 752076: I am having ALOT of trouble with solving this problem!
-x+3y=3
Click here to see answer by malglu(63)

Question 748512: Dear Sir/Madam,
I cannot figure out these simultaneous equations. Please help and show all working out.
(12-p)/p=12/b
12/p=(24-b)/b
Click here to see answer by malglu(63)

Question 752312: Solve
a) x^3+8x^2+17x+10=0

Can you please help me out? Thanks so much in advance:)
Can you please show the steps it would really help me understand:)
Click here to see answer by lwsshak3(11628)

Question 752360: Solve
a) x^3 + 8x^2 +17x + 10 = 0
Can you please help me out? Thanks so much in advance:)
Can you also show me the steps it would really help me understand
Click here to see answer by stanbon(75887)

Question 752335: 1/5 divide 4/3 + 5/2*1/2
Click here to see answer by rfer(16322)

Question 752513: 1. Solve for x
a) √(x+1) + √(2x-5) = 3
Can you please help me out? Thanks so much in advance:)
Can you please show the steps it would really help me understand:)
Click here to see answer by stanbon(75887)

Question 752511: 1. Solve for x
a) (x-1) / (x+2) + (x+7) / (x-40) = 0

Can you please help me out? Thanks so much in advance:)
Can you please show the steps it would really help me understand:)
Click here to see answer by stanbon(75887)

Question 752528: cual es el resultado para 8x-5=7x+70

Click here to see answer by tommyt3rd(5050)

Question 752534: find a coordinate of a point that lies on the y=3/2x+6
Click here to see answer by stanbon(75887)

Question 752537: 3^x-1+3^x+1=30
Click here to see answer by MathLover1(20849)

Question 752566: What number minus 2 = 2?
Click here to see answer by stanbon(75887)

Question 752549: (15m+3)/(2)=-6
3/2x-15=-12
-7x+3=-15/2
4x+1/2(12x+2)=3
3/2(x+8)=6x
Click here to see answer by josgarithmetic(39616)

Question 752655: Please help me solve v0 from this equation: h=v0t+gt2/2
Click here to see answer by tommyt3rd(5050)

Question 752774: What Is 40 = x + 3
Click here to see answer by tommyt3rd(5050)

Question 752820: help please:
�Divide 45 into two parts so that if 4 is subtracted from the lager number the result is 7 more than the smaller number?�

My instinct tells it is something to do with subtracting 11 from 45 and finding a prime number � but I am splashing about in a muddy puddle me thinks � what is the equation I should be using
how do I do this ?
Click here to see answer by RajM(5)

Question 752883: how many solutions are there for the equation 6x+2=3x+1?
Click here to see answer by jim_thompson5910(35256)

Question 752946: t + t3 + t + 8

Click here to see answer by jim_thompson5910(35256)

Question 752951: Find 25d - 10a + (4z), where d = 2, a = 3, and z = 4
Click here to see answer by jim_thompson5910(35256)

Question 752885: Show that all values are positive for P=3xsquared-6x+12
The answer is 3(x-1)squared + 9
Please can you show steps
Click here to see answer by Cromlix(4381)

Question 753124: solve: -14=-y/2
Click here to see answer by unlockmath(1688)

Question 753233: 4(-6-y)+2=10
Click here to see answer by Cromlix(4381)

Question 753308: If (1/3)t - 6 = 15, what is the value of t?
Click here to see answer by MathLover1(20849)

Question 753367: 4.5(x-2)+1.5x=2(3x-4)-1 what is the solution and how many are there?

Click here to see answer by stanbon(75887)

Question 753367: 4.5(x-2)+1.5x=2(3x-4)-1 what is the solution and how many are there?

Click here to see answer by unlockmath(1688)

Question 753648: how do you do the problem 3x-5=7 and 3x/2=3

Click here to see answer by solver91311(24713)

Question 753648: how do you do the problem 3x-5=7 and 3x/2=3

Click here to see answer by Cromlix(4381)

Question 753690: 2/3w=1/6
negative 1/9 + = 7
The track length of a popular roller coaster is 5,106 feet. The roller coaster has an average of about 2,000 feet per minute. at that speed how long would it take to travel its length of 5, 106 feet. Round to the nearest tenth. Use the formula of d=rt
Click here to see answer by solver91311(24713)

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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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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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