Tutors Answer Your Questions about Equations (FREE)
Question 1182255: Patsy Wong owns two computer service shops. This year the telephone bill for her Summit shop was $580 less than twice the telephone bill for her Norton shop. The total telephone expense for both shops was $2060. What was the cost of each shop's telephone service for the year?
Click here to see answer by josgarithmetic(39616) |
Question 1182328: Show that
2
7
sin4 2π sin4 π = cos 12π β 4 cos 10π + 2 cos 8π + 12 cos 6π β 17 cos 4π β 8 cos 2π + 14
Sum the series
sin π sin 2π + sin 2π sin 3π + sin 3π sin 4π + β― upto n terms, π β β
Solve the equation
(π§ + 1)
7 = π§
7
[cos 7πΌ + π sin 7πΌ] .
Click here to see answer by ikleyn(52776)  |
Question 1182334: Consider the vector space β3
and its subset π
π = {(π, π, π) βΆ 3π β 4π + π = 0, π + 2π β π = 0, π, π, π β β}
Show that π is a subset of β3
and also find dim π .
Determine whether or not the vectors (1, β3,2), (2,4,1) and (1,1,1) form a basis of β3
Are the following sets linearly independent or linearly dependent?
π΄ = {(3 β π, 2 + 2π, 4), (2,2 + 4π, 3), (1 β π, β2π, 1)} ; π΅ = {(1,2,3), (1,3,2), (3,7,8)}
Click here to see answer by ikleyn(52776)  |
Question 1182333: Solve the system of equations:
3π₯ + 4π¦ β 6π§ + π€ = 7
π₯ β 2π¦ + 3π§ β 2π€ = β1
π₯ β 3π¦ + 4π§ β π€ = β2
5π₯ β π¦ + π§ β 2π€ = 4
Find the rank of the matrix
π΄ = (
β2 β1 β3 β1
1 2 3 β1
1 0 1 1
0 1 1 β1
)
Verify that the matrix π΅ satisfies its own characteristic equation and hence find its inverse
π΅ = (
12 β1 4
β1 12 β1
4 β1 12
)
Click here to see answer by ikleyn(52776)  |
Question 1182332: . Find the multiplicative inverses of the given elements if they exist:
[11]16 ππ β€16 πππ [38]83 ππ β€83 .
Let π be a fixed element of a group πΊ and let
π(π‘) = {π₯ β πΊ βΆ π₯π‘ = π‘π₯}.
Show that π(π‘) is a subgroup of πΊ.
Find the order and inverse of the permutation
(
1 2 3
2 5 4
4 5 6
3 6 1
)
Click here to see answer by ikleyn(52776)  |
Question 1182331: In permutation group π6, if πΌ = (2 3 4) and π½ = (2 5 6), then find a permutation π such that
ππΌπ
β1 = π½.
Let π be a fixed element of a ring R, and let
πΌπ = {π₯ β π
βΆ π π₯ = 0}.
Show that πΌπ
is a subring of π
.
Show that β€8 = {0,1,2,3,4,5,6,7,8} is a commutative ring w.r.t. addition modulo 8 and
multiplication modulo 8.
Click here to see answer by ikleyn(52776)  |
Question 1182330: Show that
2
7
sin4 2π sin4 π = cos 12π β 4 cos 10π + 2 cos 8π + 12 cos 6π β 17 cos 4π β 8 cos 2π + 14
Sum the series
sin π sin 2π + sin 2π sin 3π + sin 3π sin 4π + β― upto n terms, π β β
Solve the equation
(π§ + 1)
7 = π§
7
[cos 7πΌ + π sin 7πΌ] .
Click here to see answer by ikleyn(52776)  |
Question 1182329: Find the multiplicative inverses of the given elements if they exist:
[11]16 ππ β€16 πππ [38]83 ππ β€83 .
Let π be a fixed element of a group πΊ and let
π(π‘) = {π₯ β πΊ βΆ π₯π‘ = π‘π₯}.
Show that π(π‘) is a subgroup of πΊ.
Find the order and inverse of the permutation
(
1 2 3
2 5 4
4 5 6
3 6 1
) .
Click here to see answer by ikleyn(52776)  |
Question 1182250: TashaΒ Spellman owns two smallΒ applianceΒ parts shops. This year the telephone bill for her Hesperia shop was $630 less than twice the telephone bill for her DiamondΒ Springs shop. The total telephone expense for both shops was $1989. What was the cost of eachΒ shop's telephone service for theΒ year?
Click here to see answer by Solver92311(821)  |
Question 1181790: ou deposit P200 in an account earning 5% compound interest for 3 years. Find the future value and the interest earned for each of the following compounding frequencies. Use the Bankers' Rule for daily compounding.
Frequency Future Value Interest Earned
Annually:
Semiannually:
Quarterly:
Monthly:
Daily:
Click here to see answer by Boreal(15235)  |
Question 1181790: ou deposit P200 in an account earning 5% compound interest for 3 years. Find the future value and the interest earned for each of the following compounding frequencies. Use the Bankers' Rule for daily compounding.
Frequency Future Value Interest Earned
Annually:
Semiannually:
Quarterly:
Monthly:
Daily:
Click here to see answer by ikleyn(52776)  |
Question 1182522: It is estimated that the annual cost of driving a certain new car is given by the formula
C = 0.35m + 2700
where m represents the number of miles driven per year and C is the cost in dollars. Jane has purchased such a car and decides to budget between $6900 and $8300 for next year's driving costs. What is the corresponding range of miles that she can drive her new car?
Jane can drive a minimum of
miles and a maximum of miles
Click here to see answer by josgarithmetic(39616) |
Question 1182634: A recommendation for wheelchair ramps is that the rise-to-run ratio be no greater than 1:12. This ensures that the ramps are navigable by people in wheelchairs. If a business needs to install a concrete ramp to the entrance of their building, which is 12 inches off the ground, how long should the ramp be and how far out horizontally on the ground will it protrude from the building? Give answers in feet and inches, such as 5 feet, 4 inches. What percent grade is the ramp?
Click here to see answer by ikleyn(52776)  |
Question 1182668: In one class students play basketball, students play soccer and students play volleyball. students play soccer and volleyball, students play basketball and volleyball and students play basketball and soccer. students play all three sports. How many students is in the class if every student plays at least one sport?
Click here to see answer by greenestamps(13198)  |
Question 1182790: a) Write a quadratic equation that can be solved by factoring and does not require the use of the quadratic formula.
b) Write a quadratic equation that cannot be solved by factoring and then solve it using the quadratic formula.
Click here to see answer by ikleyn(52776)  |
Question 1182788: For each problem, use meaningful variables to write a linear function to model the situation. Then interpret the slope and y-intercept in words. Identify which variable would be on the horizontal axis and which one would be on the vertical axis.
a) Model the cost if you buy an iPod for $200 and download songs for $1.29 each.
b) Model the weekly salary a salesman earns if his salary is a combination of his base salary and commissions on his sales. His base weekly salary is $500 and he makes $50 for each sale.
Click here to see answer by Theo(13342)  |
Question 1182928: Imagine that the price per gallon of gas with a $7 car wash is $3.19 and the price without the car wash is $3.39. When is it worth it to buy the car wash? When is it worth it if the car wash costs $2?
Click here to see answer by Theo(13342)  |
|
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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, 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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, 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
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