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

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

Question 751423: A man flies a small airplane from Fargo to Bismarck, North Dakota --- a distance of 180 miles. Because he is flying into a head wind, the trip takes him 2 hours. On the way back, the wind is still blowing at the same speed, so the return trip takes only 1 hour 12 minutes. What is his speed in still air, and how fast is the wind blowing?
His speed equals--
The wind speed equals--
Click here to see answer by ankor@dixie-net.com(15652)

Question 751646: Factor
8a^2 - 26a + 15
Click here to see answer by tommyt3rd(562)

Question 751646: Factor
8a^2 - 26a + 15
Click here to see answer by MathLover1(6632)

Question 751652: Factor each difference of squares
-2z^3 + 2z
Click here to see answer by MathLover1(6632)

Question 751651: Factor each difference of squares
(x-3)^2 - 16
Click here to see answer by jim_thompson5910(28595)

Question 751653: Completely factor the polynomial:
4bx^3 + 32b
Click here to see answer by MathLover1(6632)

Question 751644: how do you solve for x : heres the question 0.35x+0.6=0.1x+1
Click here to see answer by solver91311(16885)

Question 751532: y=(3x-4)/(5x+1)- What are the x and y intercepts of the equation. Find them exactly.
Click here to see answer by josgarithmetic(1520)

Question 751498: solve the system by substitution
-2x-y=-14
3x-y=11
Click here to see answer by dkppathak(38)

Question 751498: solve the system by substitution
-2x-y=-14
3x-y=11
Click here to see answer by stanbon(57347)

Question 750926: Solve: √x+3-5=1
The radical is extended across the top of the entire equation.. I'm stuck please help
Click here to see answer by Alan3354(30993)

Question 750832: There are 40 pupils in a class. There are X more girls than boys. How many boys are there in terms of X?
Click here to see answer by stanbon(57347)

Question 750829: If Rita is paddling her canoe upstream against the current at a speed of 2mph and later travels downstream from the current at a speed of 3mph, what is the average speed in still water
Click here to see answer by stanbon(57347)

Question 750751: If -1 < M < 1 and N does not = 0, which of the following statements is always true?
1. N <2N
2. N^2 < N
3. N^2 < 1/N^2
Click here to see answer by tommyt3rd(562)

Question 750558: what is the square root of 8z^2 y^3

Click here to see answer by tommyt3rd(562)

Question 750558: what is the square root of 8z^2 y^3

Click here to see answer by lwsshak3(6505)

Question 750538:
Click here to see answer by josgarithmetic(1520)

Question 750517: Given the following sequence, find a100
-15,-8,-1,6,13
Click here to see answer by reviewermath(522)

Question 750517: Given the following sequence, find a100
-15,-8,-1,6,13
Click here to see answer by tommyt3rd(562)

Question 750513: what does the x any y equal using substitution in both equations 2x+y=0; x+3y=-56
Click here to see answer by checkley79(3050)

Question 750512: Simplify "v" to the 6th power multiplied by "v" to the 3rd power, then "v" to the 6th power. Would the v6's cancel each other out?
Click here to see answer by Alan3354(30993)

Question 750510: Simplify (3c)to the 4th power.
Click here to see answer by Alan3354(30993)

Question 750494: what does x and y equal using substituition in both equations 2x+y=0; x=3y=-56
Click here to see answer by jim_thompson5910(28595)

Question 750224: 210+7n>400

Click here to see answer by tommyt3rd(562)

Question 750253: Factor the expression: a^4b^2+ab^5
Click here to see answer by tommyt3rd(562)

Question 750150: Solve for x
a)tx^2+(3-2t)x-6 = 0
Can you please help me out? Thanks so much in advance:)
Can you also show the steps it would really help me understand:)
Click here to see answer by josgarithmetic(1520)

Question 750145: Solve s= h/m(v-u) for m
Can you please help me out? Thanks so much in advance:)
Can you also show the steps it would really help me understand:)
Click here to see answer by tommyt3rd(562)

Question 749970: If x = 4 and y = 1/9 evaluate the expression
a) 96(x^2y^-1/2)^-2 (x^-3 y)^-1/2
Can you please help me out? Thanks so much in advance:)
Also can you please show the steps it would really help me understand better:)
Click here to see answer by MathLover1(6632)

Question 749912: 1/2x-3/10x=x-1/2
the problem im having is with the steps. its not that i do not know the answers its how do i get there????? to solve for x that is
Click here to see answer by timvanswearingen(106)

Question 749849: 1.Which property is illustrated by this example?
7x1=7
A.Associative
B.Distributive
C.Multiplication Property of Zero
D.Identity

Which property is illustrated by this example?
(3 +4) + 6 = 3 + (4 + 6)
A.Distributive
B.Identity
C.Commutative
D.Associative
Click here to see answer by fcabanski(874)

Question 749445: m/(m-9)-10=9/(m-9) how do I solve for m?

thanks :)
Click here to see answer by checkley79(3050)

Question 749183: 4+2x+2x=-12
Click here to see answer by Cromlix(339)

Question 748945: i) Find the perimeter of a rectangle with a length of 5x and width of x ( write an algebraic expression )
ii) if the perimeter was 30m, what was the value of x?
Click here to see answer by Cromlix(339)

Question 748747: Been a while since ive done algebra :)
instructions: Solve each equation. The letter a b and c are constants.
the problem is 1-ax=b and a DOESNT equal 0.
Click here to see answer by stanbon(57347)

Question 748746: Simplifying Rational Expressions
The problem below is difficult for me to understand. I am having trouble soving it. I Have written it three ways. Please Help!
1. 5 or 5/10x-60 or Five divided by ten(x) minus sixty
---
10x-60
Click here to see answer by stanbon(57347)

Question 738852: Please help me solve for x.
(square root of 2x-14) - (the square root of x) + 4 = 3
Click here to see answer by tommyt3rd(562)

Question 747873: -2(t-4)=12
Click here to see answer by Alan3354(30993)

Question 747745: Some of Aaron's friends are planning to buy him a gift worth 270, dividing the cost equally among themselves. Six more of his friends decided to share in the expenses and so each one's share is decreased by 12. How many friends were originally part of the plan?
Click here to see answer by lynnlo(4164)

Question 747820: solve the system of linear equations using the substitution method
2x-y=8
-y=-2+8
Click here to see answer by Alan3354(30993)

Question 747748: Robert is as old as roel. Four years ago he was as old as roel. How old are they now?
Click here to see answer by Alan3354(30993)

Question 747753: Stuck on question 3 which is about equation of the tangent!
Curve c has equation y=2x^2+6x+7. The ponit p, whose co-ordinates is -1,lies on the curve c. Find the equation of the tangent to C at P.
Explained answer as i dont get this type of question.
Click here to see answer by Cromlix(339)

Question 747592: 10y=9(y+11)
Click here to see answer by tommyt3rd(562)

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