Questions on Algebra: Equations answered by real tutors!

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Question 1144323: A computer programmer works 40 hours per week. What is an equation that relates the number of weeks w that the programmer works and the number of hours h that the programmer spends working?
Click here to see answer by josgarithmetic(39617)

Question 1144465: A new Neighborhood Activity ComplexNeighborhood Activity Complex is being built in Del RioDel Rio. The perimeter of the rectangular playing field is 458 yards. The length of the field is 3yards less than tripletriple the width. What are the dimensions of the playing field?
Click here to see answer by ikleyn(52781)

Question 1144485: write the equation of the line passing the point (4,-9) with slope -3/4
Click here to see answer by josgarithmetic(39617)

Question 1144486: find an equation of the line through the given pair of points (-2,-6) and (-9,-3)
Click here to see answer by ikleyn(52781)

Question 1144495: Derive a formula for the diagonal of the screen as a function of the area of the screen.
Click here to see answer by greenestamps(13200)

Question 1144532: 15x^2+8x-12=0
Click here to see answer by Edwin McCravy(20055)

Question 1144533: 15x^2+8x-12=0 solve tis by factorization

Click here to see answer by Alan3354(69443)

Question 1144538: Write an equation in slope-intercept form of the line satisfying the following conditions.
through (6,8); perpendicular to x=9

Click here to see answer by josgarithmetic(39617)

Question 1144540: Solve for the variable in the equations below. Round your answers to the nearest hundredth. Do not round any intermediate computations.
e^v=4
12^-2x=15
Click here to see answer by Alan3354(69443)

Question 1144543: x-(-5)=-2
Click here to see answer by ikleyn(52781)

Question 1144563: The total resistance, R, in a parallel circuit with three resistances, R1, R2, and R3, is given by the formula
1 over R equals 1 over R subscript 1 plus 1 over R subscript 2 plus 1 over R subscript 3
Simplify the right-hand side of the equation.
Click here to see answer by Alan3354(69443)

Question 1144567: The voltage, 𝑉, in volts, in a circuit is the square root of the product of the power, 𝑃 in watts and the
resitance, 𝑅, in ohms. If the voltage is 240 V and the power is 2500 W, what is the resistance, R, in
ohms?
Click here to see answer by greenestamps(13200)

Question 1144594: Write an equation to represent the relationship. solve the equation. eight less than half (hint: divide by 2) a number equal 25
Click here to see answer by ankor@dixie-net.com(22740)

Question 1144606: Paul bought a student discount card for the bus. The card allows him to buy daily bus passes for $1.20. After one month, Paul bought 14 passes and spent a total of of 24.80
Click here to see answer by ikleyn(52781)

Question 1144721: For B, is there an equation that can help me find the distance between the two point or is it just subtract 1 point from the middle point?
Consider the points (-1, 7) and (4, -8).
a. Find the midpoint of the line segment with the given endpoints. Show work.
M = (Xa+Xb)/2, (Ya+Yb)/2
M = (-1+4)/2, (7+(-8))/2
M = 3/2, -1/2
M = 1.5, -0.5

b. Find the distance between the points. Give the exact answer (involving a radical), simplify the radical as much as possible, and also state an approximation to three decimal places.
Click here to see answer by Alan3354(69443)

Question 1144722: How would you state the domain of f(x)=√(3x-9)?
Click here to see answer by math_helper(2461)

Question 1144728: If S is the sum of the first 10 even counting numbers and n is the sum of the first 10 odd counting numbers, find S - N.
Click here to see answer by greenestamps(13200)

Question 1144766: Find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint.
midpoint , endpoint (5, 5)

Click here to see answer by ikleyn(52781)

Question 1144839: Find all positive and negative integers x for which (x)(x)(x)=(x)^x
Click here to see answer by Edwin McCravy(20055)

Question 1144842: 5 more than a number is six less than twice a number
Click here to see answer by josmiceli(19441)

Question 1144840: Solve for x: -4(5-2x)-10x=6
Click here to see answer by josmiceli(19441)

Question 1144840: Solve for x: -4(5-2x)-10x=6
Click here to see answer by Alan3354(69443)

Question 1144856: Maria and Liam work in a banquet hall. Maria earns a 20% commission on her food sales . Liam earns a weekly salary of 625 dollars plus a 10% commission on his food sales. What amount of food sales will result in Maria and liam earning the same amount for the week? 1 solutions
Click here to see answer by josmiceli(19441)

Question 1144858: a table and 8 chairs togther weigh 97 lb. if the table weighs 25lb, how much does each chair weigh?

Click here to see answer by Shin123(626)

Question 1144858: a table and 8 chairs togther weigh 97 lb. if the table weighs 25lb, how much does each chair weigh?

Click here to see answer by richwmiller(17219)

Question 1144858: a table and 8 chairs togther weigh 97 lb. if the table weighs 25lb, how much does each chair weigh?

Click here to see answer by ikleyn(52781)

Question 1144981: Kevin’s score of 20 was four times Corey’s score.
Click here to see answer by greenestamps(13200)

Question 1144981: Kevin’s score of 20 was four times Corey’s score.
Click here to see answer by Alan3354(69443)

Question 1144928: The World Trade Center in New York City was 1350 feet tall. Suppose each floor is
12.3 feet high. If you rode the elevator from the top floor downward, how many
floors would you have passed after you dropped 120 feet?
Click here to see answer by Edwin McCravy(20055)

Question 1145011:
Click here to see answer by ikleyn(52781)

Question 1145018: 1/3(7-9w)=7w-6
I got that w= 25/12 but it doesn’t seem right and I don’t really know what I did wrong or if I missed anything
Click here to see answer by solver91311(24713)

Question 1145035: You drive a car
Click here to see answer by richwmiller(17219)

Question 1145034: What is your average velocity if you drive a
distance of 297.5 km at a speed of 50 km/h,
then the same distance at a speed of 69 km/h?
Answer in units of km/h.
Click here to see answer by ikleyn(52781)

Question 1145044: show the conjecture is false by finding a counterexample. if m=/= -1, then m/m+1<1 (m/m+1 is a fraction)
Click here to see answer by ikleyn(52781)

Question 1145045: help me pls passes through (-2,1), perpendicular to y=4x-11
Click here to see answer by ikleyn(52781)

Question 1145045: help me pls passes through (-2,1), perpendicular to y=4x-11
Click here to see answer by josgarithmetic(39617)

Question 1145045: help me pls passes through (-2,1), perpendicular to y=4x-11
Click here to see answer by Alan3354(69443)

Question 1145091: One positive number is 5 times another number. The difference between the two numbers is 1632, find the numbers.
The two numbers in increasing order are

Click here to see answer by ikleyn(52781)

Question 1145133: If f(3x-7) = 2x, find f(-1)
Click here to see answer by josgarithmetic(39617)

Question 1145194: A(0,9), B(8,15) and C(5,k). Find k if A, B and C are collinear points.
Click here to see answer by Alan3354(69443)

Question 1145258: QUESTION 2
2.1 What determines use of t-distribution and z-distribution in confidence interval calculation?
2.2 A travel agency call Centre wants to know the average of calls received by its call Centre. A random sample of 21 days is selected and the sample mean number of calls received was found to be 166.2 with a sample standard deviation of 22.8 calls. Assume that calls received daily are normally distributed.
2.2.1 Calculate a 95% confidence interval for the mean number of daily calls received by the call Centre.
2.2.2 Find the 99% confidence interval for the mean number of daily calls received by the call Centre.
2.2.3 Compare the differences in in your answers in i & ii and briefly explain the cause.
2.3 For a sample of 256 owners of medium-sized cars, it was found their average monthly car monthly car insurance premium for comprehensive cover was R356. Assume that the population standard deviation is R44 per month and that insurance premiums are normally distributed.
2.3.1 Find the 95% confidence interval for the average monthly comprehensive car insurance premium paid by all owners of medium - sized cars.

Click here to see answer by ikleyn(52781)

Question 1145201: Suppose that the relation T is defined as follows.
Give the domain and range of T.
Write your answers using set notation.
{(8,0),(-7,-6),(9,-6)}

Click here to see answer by greenestamps(13200)

Question 1145400: suppose x varies directly with y and y=25 when x=140.what is the the value x when y=36

Click here to see answer by Cromlix(4381)

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, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 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, 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, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 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, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 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