Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 345368: How do I factor this equation completely? 8k squared-18k-81
Click here to see answer by haileytucki(390)

Question 345371: The sum of x and y is equal to twice z, and y is 24 less than twice the sum of x and z. what is the value of x?
Click here to see answer by mananth(12270)

Question 345363: How do you factor this "completely?" the equation is: B squared+7B-30
Click here to see answer by ewatrrr(10682)

Question 345389: -2(x+3)=4x-3
Click here to see answer by haileytucki(390)

Question 345420: I have to solve the following by factoring
9x^3/2-37x^1/2+4x^-1/2=0
Click here to see answer by haileytucki(390)

Question 345420: I have to solve the following by factoring
9x^3/2-37x^1/2+4x^-1/2=0
Click here to see answer by MathTherapy(1430)

Question 345426: Bald eagles can dive at speeds up to 193 miles per hour. Use dimensional analysis to convert this speed into feet per second.
Click here to see answer by haileytucki(390)

Question 345467: (the original problem was solve the equation and use set equation to express solution sets for equations with no solution or equations that are true to all real numbers the equation was 2+3(2x-7)=9-4(3x+1) i solved for x and got x=4/3 how would i use set notation to express solution set x=4/3 i belive the answer to be {x|x=4/3}
Click here to see answer by Fombitz(13828)

Question 345586: Solve by using the substitution method
x+y=56
x+3y=56
Click here to see answer by rfer(12678)

Question 345586: Solve by using the substitution method
x+y=56
x+3y=56
Click here to see answer by Fombitz(13828)

Question 345684: explain how you would find a value of x that makes x + (-3) = -8 true without using models

Click here to see answer by solver91311(16897)

Question 345721: How do you simplify 3(2a+4b+7)+6a
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Question 345814: 2m-nx=x+4 solve for x work needed
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Question 345814: 2m-nx=x+4 solve for x work needed
Click here to see answer by checkley77(12569)

Question 345884: What is the solution to this problem?
y - 2x = -5
3y - x = 5
Using the Substitution Method to solve the system of equations.
Click here to see answer by mananth(12270)

Question 345934: -2/5p+2=1/5p+11
HELP ME SOLVE IT IM SO CONFUSED?!?!?!?!?!?!?!?!
Click here to see answer by Alan3354(30993)

Question 346045: help! rewrite without an exponent:
(9/4)^2 = 16/81?
Click here to see answer by Fombitz(13828)

Question 346041: simplify : y^4 *y^3*y
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Question 345731: Find the LCM of 16x^2 y^5 z^4 and 21xy^3z^2
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Question 345774: Kim and Dustin together have 96 cards, Dustin and Mike together have 93 cards, and Kim and Mike together has 81 cards. How many cards does each person have?
Click here to see answer by Fombitz(13828)

Question 346129: 5h-7=2(h+1)
Click here to see answer by nerdybill(6963)

Question 346166: 2/3 (5x-1/6) - 3/4 = 1/4
Click here to see answer by rfer(12678)

Question 346166: 2/3 (5x-1/6) - 3/4 = 1/4
Click here to see answer by Fombitz(13828)

Question 346188: Simplify your answers. Assume no denominators are 0.
Show cancelling and factoring.
y(2)-49/z(2)+z
DIVIDED BY
y+7/z
HELP ME PLEASE! Thank you!!! :)
Click here to see answer by Fombitz(13828)

Question 346341: 1/2b+4=1/8b+88
Click here to see answer by rfer(12678)

Question 346343: What is the answer to 5x-7(2-4x), can you please help me step to step, I have a test tommorow and I need some help

Click here to see answer by edjones(7569)

Question 346345: 5-(t+3)=-1+2(t-3)
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Question 346434: twice the sum of three-fourths and 15
Click here to see answer by fractalier(2101)

Question 346432: -6k+7k simplify expression
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Question 346423: a verbal expression for 4(2y+7)
Click here to see answer by fractalier(2101)

Question 346517: How do I simplify the expression and then evaluate the expression for the given values of the variables:
Problem: -a(a squared+2a-1) for a=2
Click here to see answer by stanbon(57424)

Question 346534: m divided by 6
Click here to see answer by Fombitz(13828)

Question 346712: (3b)²x3b
Click here to see answer by jim_thompson5910(28598)

Question 346724: Evaluate the expression -3 - 3i/ -2 - 2i and write the result in the form a+bi. The real number A equals ____ The real number B equals___
Click here to see answer by solver91311(16897)

Question 346771: At a local college it cost $700 to enroll in a morning section of an algebra course. Then 700n stands for the total amount of money collected for this course. How much is collected if 48 students enroll? 92 students? 230 students?
Click here to see answer by rfer(12678)

Question 346775: 5y-3/5=4/5
Click here to see answer by Fombitz(13828)

Question 346812: finding the sum of algebraic expressions.
1. 3x/2x-3 + x/2x+3=

-hope you can help me ..
thanks.
Click here to see answer by haileytucki(390)

Question 346865: the sum of 4 and the quotient of a number k and 9 is 12
Click here to see answer by rfer(12678)

Question 346865: the sum of 4 and the quotient of a number k and 9 is 12
Click here to see answer by ewatrrr(10682)

Question 346862: the product of 6 and the quantity 2 more than a number x is at least 45
Click here to see answer by rfer(12678)

Question 346861: what is the algerbraic expression of "the quotient of the square of a number t and 14"
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Question 346448: Elizabeth visits her friend Andrew and then returns home by the same route. She always walks 2km/h when going uphill, 6km/h when going downhill and 3km/h when on level ground. If her total walking time is 6 hours, then what is the total distance she walks in km?
Click here to see answer by scott8148(6628)

Question 346947: Find three consecutive odd integers the sum of which is negative twenty-one.

true or false 6 is a solution of x2 + 3 = 9 + 5x.

Click here to see answer by nyc_function(2733)

Question 346947: Find three consecutive odd integers the sum of which is negative twenty-one.

true or false 6 is a solution of x2 + 3 = 9 + 5x.

Click here to see answer by rfer(12678)

Question 346948: find the values of the variables (3x-40) (2x-10)
Click here to see answer by mananth(12270)

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