Questions on Algebra: Equations answered by real tutors!

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Question 1022494: what restriction on the domain must be made when identifying the inverse of the function y=x^2

Click here to see answer by josgarithmetic(39616)

Question 1022550: Translate into an equation. (Use x to represent the smaller number.)
The sum of two numbers is nine. Four times the smaller is equal to two times the larger.
Click here to see answer by josgarithmetic(39616)

Question 1022552: Translate into an equation. (Use x to represent the smaller number.)
The sum of two numbers is nine. Four times the smaller is equal to two times the larger.
Click here to see answer by ikleyn(52776)

Question 1022556: 2(y-5)=24

Click here to see answer by Fombitz(32388)

Question 1022558: Factorise 15p + 40

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Question 1022560: Three times the smallest of three consecutive even integers is two more than twice the largest. Find the integers.
Click here to see answer by addingup(3677)

Question 1022734: When a boy use toy to shovel to help his mother the driveway the job take 4 hours if the boy were alone it would take him 4 times longer than it would his mother ..how long would it take the boy's mother to shovel the driveway alone ?
Click here to see answer by josmiceli(19441)

Question 1022782: A rectangular playing field is 90 yards long. It's area is 3,960 square yards. Find the width of the field.
Click here to see answer by Alan3354(69443)

Question 1022820: Use elimination to solve the system of equations
4.25x - 1.28y = -9.2
x + 1.28y = 17.6
Click here to see answer by stanbon(75887)

Question 1022820: Use elimination to solve the system of equations
4.25x - 1.28y = -9.2
x + 1.28y = 17.6
Click here to see answer by addingup(3677)

Question 1022803: A boy throws a rock over the edge of a cliff. The rock is h feet above the boy after t seconds and is represented by function h=48t-16t^2.
a. What is the height of the rock after 2 seconds?
b. When is the rock 32 feet in the air?
Click here to see answer by Alan3354(69443)

Question 1022922: what is the equation if the answer is 1?

Click here to see answer by FrankM(1040)

Question 1023007: -5(1+6n)=5n-5

Click here to see answer by Alan3354(69443)

Question 1023048: A moving truck leave the house and travels at 40 miles an hour Carly's one hour later taking the same route traveling at 60 miles an hour how long till the car catches up to the truck
Click here to see answer by solver91311(24713)

Question 1023077: What would the graph of f(x) = (3x + 1) (x - 5) (x + 2) / (x-5)(x+1) look like at (x=5) and (x= -1) ? Explain.
Click here to see answer by josgarithmetic(39616)

Question 1023133: Mike wants to make meatloaf. His recipe uses a total of 7 pounds of meat. If he uses a 3 to 1 ratio, how much pork will he use? Enter in mixed simplest term
Click here to see answer by Theo(13342)

Question 1023148: 6(m - 5)(m + 5)
Click here to see answer by addingup(3677)

Question 1023188: Evaluate y' at the point (2,1) if x2 y3 = x + y + 1

2xy^3 + 3x^2y^2y' = 1 + y'
4 + 12y' = 1 + y'
11y' = -3
y' =

Click here to see answer by ikleyn(52776)

Question 1023185: evaluate f '(1) if f(x)=3x
Click here to see answer by ikleyn(52776)

Question 1023185: evaluate f '(1) if f(x)=3x
Click here to see answer by fractalier(6550)

Question 1023187: Evaluate f '(2) if f(x) = x ln(x)

Click here to see answer by ikleyn(52776)

Question 1023124: 2x-5x+3/x^2-1
Click here to see answer by Alan3354(69443)

Question 1023249: What are the equation and slope of the y-axis?
Click here to see answer by Edwin McCravy(20054)

Question 1023248: This is probability :)
Shelby noticed that out of 345 cars that passed by her house 55 were SUVs. About how many SUVs could she expect to see by if 2000 cars were to pass her house
Click here to see answer by robertb(5830)

Question 1023245: This is probability :)
The experimental probability that Tanya wins a tennis match is 0.18.
If she plays 30 tennis matches in the next week, about how many matches can Tanya expect to lose
Click here to see answer by robertb(5830)

Question 1023267: I do not understand how to solve 3n-5=19 Iv'e tried twice to do it but i still don't get it.
Click here to see answer by ikleyn(52776)

Question 1023267: I do not understand how to solve 3n-5=19 Iv'e tried twice to do it but i still don't get it.
Click here to see answer by Edwin McCravy(20054)

Question 1023175: maximize Z=8x+7y subject to 3x+y≤66 ,x+y≤45 ,x≤20 ,y≤40,x,y≥0
Click here to see answer by robertb(5830)

Question 1023273: Without using the distributive property identify the 2 steps that can be used to solve for the value of m? 2/5(m+54)=50

Click here to see answer by josgarithmetic(39616)

Question 1023220: So in my homework it says "Find the value of x so that the figures have to same perimeter. It has a triangle and it has three equations. One equation is 3x+4 the other one is 5x+1 and the last one is 2x+5. Then there is a rectangle and it has x + 13 and the last one is 2x. Thank you if someone answers this!!
Click here to see answer by josgarithmetic(39616)

Question 1023345: Determine the number of solutions to the given system without graphing.
y=4x+5
20x-5y=4
Click here to see answer by Fombitz(32388)

Question 1023351: Alyssa is buying miniature cars she wants to buy 17 cars total for a big race she and her friends are having. Silver cars are $5 each and red cars are$7 each if she spends $111 how many red cars did she by write two equations to represent this situation.
Click here to see answer by josgarithmetic(39616)

Question 1023403: y=x+5
y=x+1
2x-y=6
4x-2y=12
Click here to see answer by ikleyn(52776)

Question 1023443: What is the answer? Please show your steps.
-1/6x+1/4
Click here to see answer by solver91311(24713)

Question 1023428: Shana put $25,000 in an education account on the day her daughter was born. If the account earned 6.75% interest compounded quarterly, what was the total
in the account when her daughter turned 18? Round the final answer to the nearest
cent.
Click here to see answer by stanbon(75887)

Question 1023473: Mary left the hardware store and traveled toward her cabin on the lake at an average speed of 52 mph. Stefan left one hour later and traveled in the same direction but with an average speed of 65 mph. How long did Mary travel before Stefan caught up?

Click here to see answer by Alan3354(69443)

Question 1023427: Mary left the hardware store and traveled toward her cabin on the lake at an average speed of 52 mph. Stefan left one hour later and traveled in the same direction but with an average speed of 65 mph. How long did Mary travel before Stefan caught up?
Click here to see answer by josmiceli(19441)

Question 1023513: Determine the equation of a line containing the point -1,3 that is perpendicular to the points -2,1 And 8,-4.''.?
Click here to see answer by Alan3354(69443)

Question 1023625: . Donut Delights, Inc. has determined that when x donuts are made daily, the profit P, in dollars, is given by
P(x) = �0.002 x2 + 4.1x � 1200
(a) What is the company�s profit if 600 donuts are made daily?
(b) How many donuts should be made daily in order to maximize the company�s profit? Show work.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1023653: Harry is in three years 2 times as old as he was 6 years ago. How old is Harry now? In three years? What about 6 years ago?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1023653: Harry is in three years 2 times as old as he was 6 years ago. How old is Harry now? In three years? What about 6 years ago?
Click here to see answer by josmiceli(19441)

Question 1023772: X over 4 equals 7.5 over 2.5 and x is 12
Click here to see answer by robertb(5830)

Question 1023772: X over 4 equals 7.5 over 2.5 and x is 12
Click here to see answer by Edwin McCravy(20054)

Question 1023772: X over 4 equals 7.5 over 2.5 and x is 12
Click here to see answer by Alan3354(69443)

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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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, 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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, 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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, 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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