Questions on test answered by real tutors!

Tutors Answer Your Questions about test (FREE)

Question 1130748: Find the derivative of tan (x + y) + tan (x - y) = x
Click here to see answer by Alan3354(69443)

Question 1130831: (1)If $88.00 is paid for 4 hours of work then the pay rate is
(2)A man spent 15% of his income on rent and 48% on food .what % is his balance
Please show working out
Click here to see answer by josgarithmetic(39615)

Question 1130852: Calculus
limits h→0 f(x+h)+f(x)/h when f(x)= 4x^2-x
Click here to see answer by Alan3354(69443)

Question 1130977: The fraction y/9x is equivalent to 7/9 when y=
Click here to see answer by ankor@dixie-net.com(22740)

Question 1130986: For any vector A
prove that |A�i|� + |A�j|� + |A�k|� = |A|�
Click here to see answer by Edwin McCravy(20054)

Question 1130997: Find the first term of the arithmetic sequence in which, a27=-1/2 and the common difference is 2.
A. 103/2
B.-105/2
C.-103/2
D.111/2
Click here to see answer by MathLover1(20849)

Question 1130991: a 70% acid is to be mixed with water to produce a 5 liter mixture containing 28% acid. How many milliliters of water and how many milliliters of the 70% acid solution are needed to create the 28% acid solution?
Click here to see answer by josmiceli(19441)

Question 1130990: a grocer wants to create a mixture of jolly ranchers and tootsie pops. if jolly ranchers sell for $2 per pound and tootsie pops sell for $5 per pound how many pounds of toosie pops must be mixed with 20 pounds of jolly ranchers to create a mixture that sells for $4 per pound?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1131246: Find the deivative using the increment steps.
1. Y = (x^2 - 7)/(x^2 + 3)

Click here to see answer by greenestamps(13198)

Question 1131248: Find the derivative using increment steps
x^3 - 2x^2 + 7x - 3
Click here to see answer by solver91311(24713)

Question 1131261: PROVING
A. limit as delta x approaches to zero cos delta x-1/delta x
B. limit as delta x approaches to zero sin delta x/delta x
Click here to see answer by solver91311(24713)

Question 1131285: inverse F(x)=-2x+7

Click here to see answer by Alan3354(69443)

Question 1131289: Prove that no group of order 96 is simple.
Click here to see answer by MathLover1(20849)

Question 1131403: My number is a multiple of 15. My number is also a multiple of 10 my number is greater than 100 my number is less than 200
Click here to see answer by josgarithmetic(39615)

Question 1131403: My number is a multiple of 15. My number is also a multiple of 10 my number is greater than 100 my number is less than 200
Click here to see answer by ikleyn(52765)

Question 1131431: It costs a company $3,500 to produce 3,000 pencils whereas it costs the company $1,500 a month even if they don't produce any pencils. If they sell the pencils for $0.75 and the cost, revenue, and profit functions are known to be linear, determine how many pencils they must make in a month to break even.
Click here to see answer by josmiceli(19441)

Question 1131540: Sommoya has a piece of string 48cm long. She cut it into 3 pieces. One piece is 16cm long;(a) find the total length of the first piece and second piece.(b) What is the length of the third piece?
Click here to see answer by ikleyn(52765)

Question 1131541: Sommoya has a piece of string 48cm long. She cut it into 3 pieces. One piece is 16cm long;
(a) find the length of the first and second piece?
(b) what is the length of the third piece?
Click here to see answer by ikleyn(52765)

Question 1131577: The number of bacteria in a certain population increases according to a continuous exponential growth model with a growth rate of 8.6% per hour. How many hours does it take for the size of the sample to double?
Click here to see answer by stanbon(75887)

Question 1131641: make a courtyard that has 40% grass , 50% stone, and 10% water you have a budget of 25k and the stone costs 30$ per meter squared
Click here to see answer by ikleyn(52765)

Question 1131927: Prove that the area of the minor segment cut off from a circle of radius r cm by a chord c cm from the centre of the circle is given by
1/2[2πcos^(-1)(c/r)r�/180�-2c(r�-c�)^�]
Click here to see answer by Alan3354(69443)

Question 1131926: Prove that the area of the minor segment cut off from a circle of radius r cm by a chord c cm from the centre of the circle is given by
(1/2)[2π{cos^(-1)(c/r)}*r�/180� - 2c(r�-c�)^�]

Click here to see answer by Alan3354(69443)

Question 1131982: Six builders take 1 hour to build the same wall. How long would it take for 2 builders to build the same wall?
Click here to see answer by ikleyn(52765)

Question 1131586: In a classroom, two-third of the students are wearing blue jeans and three-fourth of those students are wearing T-shirts. How many students are wearing jeans and a T-shirt? show work.
Click here to see answer by greenestamps(13198)

Question 1131643: A trainer wants to estimate the population mean training time for female runners within 2 minutes. Determine the minimum sample size required to construct a 99% confidence interval for the population mean training time of female runners. Assume the population standard deviation is 8.4 minutes.
Click here to see answer by Boreal(15235)

Question 1132106: If Tr be the rth term in the expansion of (1+x)^n in ascending powers of x.
Prove that T(r+2)/Tr = [(n-r+1)(n-r)/(r+1)]x�
Click here to see answer by ikleyn(52765)

Question 1132101: The following record came from the University Registrar at O.A.U, Ile-Ife some years ago. The record showed that the total enrolment in the university was 10,000 students. Of these, the Registrar stated that 2,521 were married, 6,471 were men, 3,115 were over 21 years of age, 1,915 were married men, 1,873 were married persons over 21 years and 1,302 were married men over 21 years of age. 512 women were over 21 years and not married while 3,826 men were not married and not over 21 years.
Find the difference between the women that are not married and not over 21 years and the men that are not married but over 21 years.
Click here to see answer by Theo(13342)

Question 1132133: Solve for 0� ≤ θ ≤ 360�:
2cos�θ - 3sin2θ - 2 = 0
Click here to see answer by MathLover1(20849)

Question 1132138: Solve for 0� ≤ θ ≤ 360�:
2cos�θ - 3sin2θ - 2 = 0
Note:
It's 3sin2θ and not 3sin�θ
Click here to see answer by MathLover1(20849)

Question 1132132: Find the value of (cos248� + sin158�)/(cos292� + sin202�) leaving your answer in terms of a, given that sin22� = a.
Click here to see answer by greenestamps(13198)

Question 1132154: A car travels 600 km at an average speed of x km/h. If the car travels at a speed of (x-5) km/h, the journey would have taken 30 minutes longer. Form an equation in x and show that it reduces to x2-5x=6000. Solve this equation and find the time taken when the car travels at a speed of x km/h.

x2 is x squared
Click here to see answer by josgarithmetic(39615)

Question 1132323: 12 children and 18 men complete a certain piece of
artwork in 9 days. Each child takes twice the time taken by
a man to finish the artwork. In how many days will 18
men take to finish the same artwork?

Click here to see answer by josgarithmetic(39615)

Question 1132324: ) Dheeraj is half of the age of his Father. His father is 4
years elder to his mother. 4 years back, Dheeraj was half
the age of his mother. What is the present age of Dheeraj?
Click here to see answer by ikleyn(52765)

Question 1132333: Ruth made a scale drawing of a house and its lot. She used the scale 3 millimeters = 1 meter. What scale factor does the drawing use?
Simplify your answer and write it as a ratio, using a colon.

Click here to see answer by Alan3354(69443)

Question 1132326: How to solve (x-y)^2 dy = a^2 dx by separation method?

Click here to see answer by Edwin McCravy(20054)

Question 1132355: The sum of three consecutive odd numbers, the smaller of which is equal to 2n - 1.
Write as an equation
Click here to see answer by ikleyn(52765)

Question 1132372: what is 5/6 of $45
Click here to see answer by MathLover1(20849)

Question 1132376: [1+2k. -4k. [3 -4]
k. 1-2k]. 1. -1 it is question of matrix

Click here to see answer by ikleyn(52765)

Question 1132427: An isosceles triangle has a vertical angle of 120 degree and a base 40cm.
What will be the length of it's altitude.
Click here to see answer by Alan3354(69443)

Question 1132481: my question is that: please explain why the function is T(n) = (600-50n)*(10+n) and explain if the function is continuous at a point or not.
in the problem: A school concert usually attracts 600 people at a cost of $10 per person.
On average for every $1 rise in admission price, 50 less people attend the concert.
If T is the total amount of takings and n is the number of $1 increases write a rule for the function which gives T in terms of n.
my question is related to limits and/or continuity
Click here to see answer by Theo(13342)

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