Questions on Algebra: Equations answered by real tutors!

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Question 1097632: Directions: Given the following information, write the equation of the line in slope-intercept form. (hint: put in point slope form and solve)
Question: Passing through the point (0,-3) and has the same slope as the line : 2X = y + 3
Click here to see answer by rothauserc(4718)

Question 1097756: A pharmacist is to prepare 15ml of special eye drops for a glaucoma patient. The eye-drop solution must have a 2% active ingredient, but the pharmacist only has a 10% and 1% solution in stock. Identify which one of the following shows the correct amount of each type of solution should be used to fill the prescription (2 decimal places required).
Totally lost.
Initially I thought:
0.1x +0.2 =15 0.01 y +0.2 =15
-.2 from both sdes
and then divided both sides by the decimal....giving a totally nonsense answer.
Totally lost.
Click here to see answer by ikleyn(52776)

Question 1097754: I added five to a number and obtained an answer of 21. What was the original number?
Click here to see answer by ikleyn(52776)

Question 1097755: I added five to one- third of a number and obtained an answer of 21. What was the original number?
Click here to see answer by josgarithmetic(39616)

Question 1097900: Andrew has more money than Ben, if Andrew gave Ben �20, they would have the same amount, while if Ben gave Andrew �22, Andrew would have then have twice as much as Ben.
So, new working
A-20 = B+20
B-22 =2A +22
Solve for one, substitute new value into other equation. I "solved" equation 2, and got:
B=2A+44
substituting it into equation 1:
A-20=2A+44+20
A=2A+84
A=84
I ended up with a result of 84 (wrong)
Click here to see answer by Theo(13342)

Question 1097931: A salesman offered to sell a motorcycle for $1,024. A month later his price was $640 and 2 weeks after that he asked $400. Just last week he was willing to sell it for $250. What will his next price be if he make a consistent reduction?
Thank you

Click here to see answer by Theo(13342)

Question 1097895: An inventory of two types of floodlights showed a total of 60 lights valued at $2580. If Type A cost $40 each while Type B cost $50 each, how many Type B floodlights were in inventory?
For this problem, set up an equation in one unknown and solve.
Click here to see answer by math_helper(2461)

Question 1097923: What is the ordered pair of the equation y=10x+1? Please explain.
Click here to see answer by KMST(5328)

Question 1097923: What is the ordered pair of the equation y=10x+1? Please explain.
Click here to see answer by math_helper(2461)

Question 1097972: the difference between 5y+1 and 3y+2 is equal to -9
find y
Click here to see answer by ikleyn(52776)

Question 1098036: one side of the triangle is 10 the other is 5 and the last is unknown
using c squared=a squared + b squared what is the working out and the last side
Click here to see answer by greenestamps(13198)

Question 1098084: A five-team hockey league has a schedule requiring each team to play each of the other teams 5 times. What is the total number of games that will be played?
Click here to see answer by tutorofthis(1)

Question 1098117: rearrange the formula 1= r/p for r
there is a weird check mark thingy before the r/p
Click here to see answer by Alan3354(69443)

Question 1098117: rearrange the formula 1= r/p for r
there is a weird check mark thingy before the r/p
Click here to see answer by t0hierry(194)

Question 1098141: This is another question I need help on.
Write an equation of a line passing through (2,-3) and is perpendicular to y=x/3-2/3.
Click here to see answer by josmiceli(19441)

Question 1098171: f(x) = 5^4x + 20.5^2x
solve the equation f(x) - 125 = 0
Click here to see answer by ikleyn(52776)

Question 1098171: f(x) = 5^4x + 20.5^2x
solve the equation f(x) - 125 = 0
Click here to see answer by greenestamps(13198)

Question 1098271: please help me solve this:
x(x+2)x4-x+3x5=-14
Thank you.
Click here to see answer by Alan3354(69443)

Question 1098292: X2 -3x -4 = 0
Click here to see answer by Alan3354(69443)

Question 1098287: find x
________________________________________
Find a(not A)
Click here to see answer by richwmiller(17219)

Question 1098224: If inversely as v, and x=30 when v=3, find x when v=18
Click here to see answer by josgarithmetic(39616)

Question 1098189: write the equation of the line perpendicular to 3x-1=0 and passing through (-1/2,3/4)
Click here to see answer by josgarithmetic(39616)

Question 1098379: A rope 75 feet long is cut into two pieces where one is 11 feet longer than the other.Find their lengths.
Click here to see answer by wilft1(217)

Question 1098379: A rope 75 feet long is cut into two pieces where one is 11 feet longer than the other.Find their lengths.
Click here to see answer by Alan3354(69443)

Question 1098379: A rope 75 feet long is cut into two pieces where one is 11 feet longer than the other.Find their lengths.
Click here to see answer by josgarithmetic(39616)

Question 1098381: what two different numbers can i multiply together to get 169.63

Click here to see answer by Alan3354(69443)

Question 1098412: Write the equation of a line parallel to the given line and passing through the given point. y = -x + 7; (-7,-1)
Write the equation of a line perpendicular to the given line and passing through the given point. y = -x + 7; (-7,-1)
Click here to see answer by Boreal(15235)

Question 1090627: -1/2x-7=-11
Click here to see answer by EdenWolf(517)

Question 1090627: -1/2x-7=-11
Click here to see answer by Alan3354(69443)

Question 1098559: x^2+xy+yz+zx=30
y^2+xy+yz+zx=15
z^2+xy+yz+zx=18
find x^2+y^2+z^2
Click here to see answer by richwmiller(17219)

Question 1098559: x^2+xy+yz+zx=30
y^2+xy+yz+zx=15
z^2+xy+yz+zx=18
find x^2+y^2+z^2
Click here to see answer by ikleyn(52776)

Question 1098621: how do I solve. x-y=4 & x^2-y^2=8

Click here to see answer by Alan3354(69443)

Question 1098621: how do I solve. x-y=4 & x^2-y^2=8

Click here to see answer by Theo(13342)

Question 1098648: To solve an equation with a fractional coefficient multiply each side by the what
Click here to see answer by josgarithmetic(39616)

Question 1098672: A manufacturer sells a product for $10 per unit. The manufacturer�s fixed costs are $1200 per month, and the variable costs are $2.50 per unit.
a) How many units must the manufacturer produce each month to break even?
b) Find the profit function for the manufacturer.
c) Graph the profit function showing clearly the profit and loss regions.
Click here to see answer by josgarithmetic(39616)

Question 1098678: P(x)= ax^3- bx^2+cx-8 has zeros 2 and -1. P(3)= 28. Evaluate a, b and c.
this is all I have so far, how do I solve this question?
P(x)= (x-2)(x+1)Q(x)
Thank you in advanced :)
Click here to see answer by josgarithmetic(39616)

Question 1098701: Can u solve this equation and check results 0.4(2x-3)=1.2(4-x)

Click here to see answer by amalm06(224)

Question 1098708: Pythagorean Thereom Question. (X+1)^2 + 6^2 = 9^2 It is a professor Leonard problem but he does not show how to do the rest https://youtu.be/Yu6IylZHYr4?t=53m16s This math stuff is really got me down dirty man. Here I am on year 2 and it's like I still can't figure out arithmetic options like a pro yet.
Click here to see answer by Alan3354(69443)

Question 1098699: In a regular pentagon, all of the interior angles are equal in measure. The sum of the angle measures 540�. This pentagon has 5 angles.
Whats the answer to this equation solved, written out, and checked? ^^

Click here to see answer by Alan3354(69443)

Question 1098762: I need to write the expression 1/81 without using the fraction bar how do I do that?

Click here to see answer by Alan3354(69443)

Question 1098789: I don't understand how to solve a certain type of exponential function. The textbook is not explaining the full steps. The textbook example:

line 1

line2

line 3

line 4

line 5

From here the equation gets factored down until the final answer is x= -1 or x = 2. I understand that part and I follow the first three lines. I get that z is substituted for

I don't follow what is happening in lines 4 and 5. Could someone please explain in detail those two lines?
Click here to see answer by ikleyn(52776)

Question 1098826: Frame Masters, Inc., recently purchased $5500 worth of new equipment in order to offer a new eyeglass frame. The marketing department of Frame Masters estimates that the cost of producing this new fame is $18 and that the frame will be sold to stores for $38. Find the number if frames that must be sold in order to break even.
Click here to see answer by Theo(13342)

Question 1098867: Find equation of the tangent to the curve y(x) = tan x at the point (π/3, root 3 )

Click here to see answer by Fombitz(32388)

Question 1098866: Determine the equation of the cubic polynomial which cuts the x-axis at x =1/2
, touches the x-axis at
x = −3, and passes through (1, 24).

Click here to see answer by Fombitz(32388)

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, 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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, 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