Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 53274: I really have no idea how to do this. Can someone please help?
Write the equation of the line with slope -1/2 and y- intercept (0,3)
Thank you!
Click here to see answer by ankor@dixie-net.com(22740)

Question 53282: Lane invested $10,000 part at 15% and part at 14% If the total interest at the end of the year is 1,430, how much did she invest at 15%?
Click here to see answer by ankor@dixie-net.com(22740)

Question 53280: Will you also please show me how to solve the system by addtion
5x-3y=13
4x-3y=11
Thank you
Click here to see answer by stanbon(75887)

Question 53279: Can you please show me how to solve the system by addition?
x+y=9
x-y=9
Thank you
Click here to see answer by Nate(3500)

Question 53279: Can you please show me how to solve the system by addition?
x+y=9
x-y=9
Thank you
Click here to see answer by stanbon(75887)

Question 53277: Will you please write the equation of the line that passes through point (-4,-17) with a slope of 3.
Thank you
Click here to see answer by stanbon(75887)

Question 53270: I give up!!! Please help.
The perimeter of a rectangle is to be no greater than 300 in. and the length must be 125 in. Find the maximum width of the rectangle.
Click here to see answer by Nate(3500)

Question 53275: Are the following lines parallel, perpendicular, or neither?
L1 with equation x-2y=10
L2 with equation 2x+y=2
Click here to see answer by stanbon(75887)

Question 53269: Another word problem...help!
Allen bought 30 stamps at the post office in 39 cent and 24 cent denominations. If the total cost of the stamps was $9.90, how many 39 cent stamps did Allen buy?
Click here to see answer by Nate(3500)

Question 53272: Ordered pairs??
Which of the ordered pairs are solutins for the equation x+5y=3
(-12,3) (3,0) (-12,-3) (-22,5)
Click here to see answer by Nate(3500)

Question 53278: Given f(x)=-x^3 -3^2 + 3x+7, find (-1), f(0), and f(2)
Click here to see answer by Earlsdon(6294)

Question 53266: I am having trouble with writing an expression using associative property of addition that is equivalent to (9 + 20)+ 19
Can you help?
Thanks!
Click here to see answer by Earlsdon(6294)

Question 53267: Can you please show me how to figure this problem?
Multiply (4xy^3)(2xy^2y)(5xy^2)
Thank you so much!
Click here to see answer by stanbon(75887)

Question 52903: 6(r plus 2)-4= -10
6(r+2)-4=-10
6r+12-4=-10
6r+6=-10
r+6=-10/6
r=-10/6-6
Click here to see answer by jordan942(2)

Question 53337: find the perimeter of a triangle of sides 6x-4, x^2+2(1-2x) and x(x-1) in terms of x.
Click here to see answer by venugopalramana(3286)

Question 53341: What is 24 - x - 24 = -16 - 24? I have to justify each step, but I don't know where to start.
Click here to see answer by Nate(3500)

Question 53342: Help me please!! I dont understand how to do this with a fraction:
4a+3/4=19/4
Click here to see answer by Nate(3500)

Question 53356: What is -10 = -6 + 2c? I tried to solve it and I got -8, but when I checked it it didn't equal to -10.
Click here to see answer by stanbon(75887)

Question 53375: i never did this before so here is the problem
3x+5x i do not under stand
Click here to see answer by stanbon(75887)

Question 53379: find four consecutive even intergers such that six times the sum of the first two exceeds twice the sum of the first and the forurth by 416
Click here to see answer by ankor@dixie-net.com(22740)

Question 53394: Is the given number a solution of the equation?
9k = 10 - k; -1
-7r - 15 = -2r; -3
-3p = 4p + 35; -5
8 -e = 2e - 16; 8
5 - 15s = 8 - 16s; 3
2(x - 2) - 5x = 5(2 - x); 7
6a + 3 = 3(3a - 2); 4

Click here to see answer by funmath(2933)

Question 53403: Find the constant of variation K.
m varies directly with n; m= 144 when n=8
These are tough!! I appreciate your time!!! McGraw Hill 6th edition,chapter 6 sec. 4, problem # 52. Thanks again!
Click here to see answer by Earlsdon(6294)

Question 53199: 8c=;c=10 whether the number given is a solution to the equation
Click here to see answer by consc198(59)

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 consc198(59)

Question 53414: What is -q + 5 = 10? I did:
-q + 5 = 10
-5 -5
-q = 5
-1(-q) = -1(5)
q = -5
Am I right?
Click here to see answer by consc198(59)

Question 53413: What is -1 = -n - 3? I did:
-1 = -n - 3
+3 +3
n = 2
-1(2) = -1(-n)
n = -2
Am I right?

Click here to see answer by consc198(59)

Question 53412: What is -p - 24 = -8? I tried to solve it and I got -16. But when I check -16 - 24 it equals -40.
First I did -p - 24 = -8
+24 +24
-p = 16
-1(-p) = -1(16)
p = -16
Is this right?
Click here to see answer by consc198(59)

Question 53418: Will you help me find the solution to this equation: 6x-3(6-5x)+3x=10-4(2-x)
I tried this:
6x-18+15x+3x=10-8+4x
21x-15=2+4x
25x-15=2
25x=17
x=17/25
I know the answer is supposed to be 1, I just don't know how to get it.
Click here to see answer by stanbon(75887)

Question 53408: At 10:00AM a car leaves a house at a rate of 60 mph. At the same time another car leaves the same house at a rate of 50 mph in the opposite direction. At what time will the cars be 330 miles apart?

I know I need rate ( 50mph and 60 mph) distance and time. I need a variable for either distance or time. My final answer is to find out what time it will be when they are 330 miles apart. Which one is the variable, the time or the distance. I also know the final answe is 3 hours or 1 pm, but I don't know how to write the equation to get there.
This isn't from the text book, it is from a worksheet.
Click here to see answer by ankor@dixie-net.com(22740)

Question 53468: Can someone help me on this problem?
I need to solve and check the following equation:
5x + 8 + 3x -x + 5 = 6x -3
Thanks,
Sher
Click here to see answer by ankor@dixie-net.com(22740)

Question 53523: Mr. Smith has $100.00 to buy 100 animals with. Cows cost $10.00 each, pigs cost $3.00 each and chickent cost $.50 each. How many can he buy with exactly $100.00.
I have this equation so far, but where do I go from here?
10x + 3y + .5z = 100
Click here to see answer by stanbon(75887)

Question 53549: How can 6,6,5,2 using the order of operations become 24?
Click here to see answer by stanbon(75887)

Question 53586: Can someone help me on this problem?
I need to solve for x and check my results:
6x-5/5 - 2x/3 = 3
Thanks,
Sher
Click here to see answer by stanbon(75887)

Question 53586: Can someone help me on this problem?
I need to solve for x and check my results:
6x-5/5 - 2x/3 = 3
Thanks,
Sher
Click here to see answer by checkley71(8403)

Question 53583: Can someone help me solve this problem?
I need to solve for x and check the results:
-4(2x - 3) = -8x + 5
Thanks,
Sher
Click here to see answer by funmath(2933)

Question 53584: i have a test tomorrow and im strugling can u help solve this question on my review
7n+2[3(l-n)-2(1+n)=14
another question is -10+4(3p+10)=18
one more is 66=-6/5(s+3)
Click here to see answer by stanbon(75887)

Question 53576: find y for each specified x value
xy = 18 ; x = 4.5
Click here to see answer by checkley71(8403)

Question 53576: find y for each specified x value
xy = 18 ; x = 4.5
Click here to see answer by rchill(405)

Question 53632: Can someone help me on this problem?
I need to solve for x and check my results:
6x-1/5 - 2x/3 = 3
Thanks,
Sher
Click here to see answer by rchill(405)

Question 53633: Complete the ordered pairs so the each is a solution for the given equation.
3x + 4y = 12 (0, ), ( ,3/4), ( ,0), (8/3, ). Thanks so much for youer help!!! Mcgraw Hill 6th edition, chapter 6, section 1, prolem # 24.
Click here to see answer by rchill(405)

Question 53104: Solve for x:

4x - (-1 + 3) = 2x – 1
2

Enter a fraction, NOT a decimal.
x =
Click here to see answer by rchill(405)

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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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