Questions on Algebra: Equations answered by real tutors!

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Question 140738: i know how to do equations the easy way, for example, one of my questions is- k divided by negative 5 equals negative 5. so k=1 because 1 times negative 5 equals -5. but my teacher wants me to show my work the mathematical way, but we had a sub today who did not explain to me well at all the mathematical way. so can you help me? Thank so very much for your time.

Shannon
Click here to see answer by checkley77(12844)

Question 140807: Find the values of x and y that solve the following system of equations
-5x-7y=-1
2x+9y=-12

Click here to see answer by ptaylor(2198)

Question 140841: Collect the like terms...
5ab-7ab^2-3ab-12ab^2+10ab-9ab^2
Click here to see answer by rapaljer(4671)

Question 140806: Solve the following equation
9y+5 5y+5
----- - -------- = -3
7 2

Click here to see answer by checkley77(12844)

Question 140946: 1.) The mailroom is on the 6th floor. The mailman goes up 2 floors to deliver the mail. Next he goes up 7 floors. Then he goes down 11 floors. What floor is he on?
Thank yall so much
Click here to see answer by checkley77(12844)

Question 140986: 2x + 5 / 3 = 5x + 6
Can someone help me??
Click here to see answer by jim_thompson5910(35256)

Question 140948: Suppose a hot air balloon is 250 feet in the air. The balloon drops at 25 feet per minute. Write an interger to express the number of minutes it takes to land the balloon.

Thank yall so much!!!!!
Click here to see answer by edjones(8007)

Question 140947: Suppose you descend 20 feet from each of 4 rocks. Write an integer to express you total descent in feet.

Thank yall so much
Click here to see answer by smarty1994(10)

Question 140945: Can you help me find the absolute value of 22?

Thanks so much
Click here to see answer by vleith(2983)

Question 140944: May you please help me find the absolute value of -13?

Thanks for the help!!
Click here to see answer by vleith(2983)

Question 140943: Can you help me find the absolute value of -31?

Thanks for the help!!!
Click here to see answer by nabla(475)

Question 141091: Can a tutor help me please* My problem is to solve and write the answer in set notation: |3x-6|>3
Thank you, thank you, thank You!!!
Click here to see answer by stanbon(75887)

Question 141118: How do you know when an equation has an infinitely number of solutions or when an equation has no solution?
Click here to see answer by rapaljer(4671)

Question 140942: Can you please help me find the absolute value of 27 thank you so much!!!!
Click here to see answer by edjones(8007)

Question 141197: Define the solutions to
Q(y)=y^4-10y^2+9
a. (y-1)(y_1)(y-3)(y+3)
b. 1, -1, 3, -3
c. -1, -3 only
d. None of the above
Click here to see answer by checkley77(12844)

Question 141197: Define the solutions to
Q(y)=y^4-10y^2+9
a. (y-1)(y_1)(y-3)(y+3)
b. 1, -1, 3, -3
c. -1, -3 only
d. None of the above
Click here to see answer by stanbon(75887)

Question 141203: Factor the following:
r(s) = 2s^2 + st - 2s -t
a. r(s) = 2(s+1)(s-1)
b. r(s) = (2s-t)(s-1)
c. r(s) = (2s+1)(s-1)
d. This cannot be factored; it's prime
I selected d.
Click here to see answer by nabla(475)

Question 141202: How many real zeroes are there in f(x) = x^3 + 27
a. 3
b. 1
c. None, you cannot factor this polynomial
d. None of the above
I figured b. 1 because the factors of 27 are 1, 3, 9, 27 and the factors of 1 is 1. So they only have one factor in common.
Click here to see answer by nabla(475)

Question 141230: 2x+4y=24
-15x+10y=-20
x=? y=?
Click here to see answer by checkley77(12844)

Question 141229: -4x+5y=6
3x+2y=7
x=? y=?
Click here to see answer by checkley77(12844)

Question 141231: I had to find the range, lower quartile, upper quartile, intermediate range, and median for 2,4,6,8,1, 4, 6, 7, 10, 0
I wrote 0, 1, 2, 4, 4,6, 6, 7, 8, 10
range - 10
median - I added 4 + 6 and divided by 2 = 5
This is where I got marked wrong and don't understand why
lower quartile - 2
upper quartile - 7
intermediate quartile - 5
Please explain and thanks.....Justin
Click here to see answer by stanbon(75887)

Question 141239: 2x+3y=6
2x-5y=22
x=? y=?
Click here to see answer by oscargut(2103)

Question 140974: Find x^2 + y^2 if x and y are positive integers such that:
xy + x + y = 71
x^2y + xy^2 = 880
Click here to see answer by oscargut(2103)

Question 141282: Hi....Can someone please check my work?
1,2,3,3.2,3.4,4,5,5,5.3,6,7,26,45,78
Median - 5
Range -77
Lower Quartile - 3.2
Upper Quartile - 7
Intermediate Quartile - 3.8
Thanks
Click here to see answer by stanbon(75887)

Question 141365: can you help me solve this?
4(2w+5)=12w-9
Click here to see answer by checkley77(12844)

Question 141402: it it take 15 people 8 hours to make 100 items how long would it take 6 people working the same rate to make half as many items?
i tried working this out by dividing 6 and 15 to get 0.4
then i took 8 and divided it by 0.4 and got 20.
so i ended up with 6 people, 20 hours and 100 items. sinse the question asks for half the items i devided 20 hours and 100 items by 2. and ended up getting 10 hours for 50 items (half the items) but when i showed it to my teach she wanted and actual equation for the problem. but i cant find one for it.
Click here to see answer by scott8148(6628)

Question 141421: A line intercepts the y-axis at the point (0,8). From there the line moves up four units for every one unit it moves to the right. What is the equation of the line in slope-intercept form.
here is my work Y=mx+b
y=1/4x+8
Click here to see answer by rapaljer(4671)

Question 141424: write y in terms of x, if y is proportional to the 5th power of x, and y=744 when x=2
Click here to see answer by stanbon(75887)

Question 141390: can some one help me with this problem
kath earns $445 a week for 40 hours of work and $25 an hour for each hour over 40. how many hours did kathy work if she earned $570 in one week?
Click here to see answer by checkley77(12844)

Question 141383: kathy earns $445 a week for 40 hours of work and $25 and hour for each hour over 40. how many hours did kathy work if she earned $570 in one week?
Click here to see answer by checkley77(12844)

Question 141376: 6n+4n-n+5=23
36-4c-3c=22
28=10a-5a-2
3/8+p/8-31/8
4g/14-3/7-g/14=3/14
5/11=-3b/11+8b/22

Click here to see answer by checkley77(12844)

Question 141506: Which of the following is another version of ?
a.
b.
c.
d. cannot be factored; prime
Click here to see answer by Edwin McCravy(20054)

Question 141532: i don't get how to do this
Click here to see answer by solver91311(24713)

Question 141620: The ideal maximum heart rate for 25 years old who burn fat is 117 beats per minute. For every 5 years older than 25, that ideal rate drops 3 beats per minute. Write a linear equation to find the ideal maximum over 25 who is exercising to burn fat. Graph the equation. Find the ideal maximum heart rate for a person exercising to burn fat who is 55 years old.
Click here to see answer by ankor@dixie-net.com(22740)

Question 141724: (solve each inequality)
7x+2x>21-3
Click here to see answer by checkley77(12844)

Question 141875: Solve for the indicated letter.
d=7e, for e
The solution of e is?
How the heck do I go about doing this one, can someone please help??
Click here to see answer by rapaljer(4671)

Question 141976: At 8.15a.m, a van started from Town X heading for Town Y at a constant speed of 50km/h. Half an hour later, a lorry passed Town X also heading towards Town Y at a constant speed of 70km/h
(a) At what time would the lorry catch up with the van?
(b) If the lorry reached Town Y at 1.45pm, what is the distance between the 2 towns?
Click here to see answer by Edwin McCravy(20054)

Question 141977: Andy and Ben took 4 hours to paint a room together. Andy could paint the same room on his own in 7 hours. How long would it take Ben to paint the same room on his own? ( Leave the answer as a mixed number )

Click here to see answer by stanbon(75887)

Question 141974: gigi has 200 coins of different values. the ratio of the number of 50-cent coins to the number of 20- cent coins to the number of 10-cent coins is 5:3:2. what is the total value of the 50- cent coins?

Click here to see answer by stanbon(75887)

Question 142009: Which of the following is a line perpendicular to y = 1/2x + 4?
a. y = 1/2x - 1/4
b. y = 2x - 4
c. y = 2x - 1/4
d. y = -2x
Click here to see answer by oscargut(2103)

Question 142008: What is the y-intercept of y = 1/2x + b if it passes through (-8,-4)?
a. m=0
b. b=0
c. b=-4
d. Insufficient information given
Click here to see answer by oscargut(2103)

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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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, 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