Questions on Algebra: Equations answered by real tutors!

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Question 44709: The length of a retngle is 1 in. more than twice its width. If the perimeter of the rectangle is 26 in., find the width of the rectangel
A) 4 in.
B) 5 in.
C) 6 in.
D) 3 in.

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Question 44707: graph f(x)=3x+2
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Question 44705: graph 3x+2y=6
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Question 44710: solve the system of equations
4x-4y=-8
y=2 + x

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Question 44550: elimination method
1.3x-0.2y=12
0.4+17y=89
show work please

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Question 44797: Hello!
Can somebody help please?
The mythical town of Alphaville had a population of 10,000 people in 1930. Since then, the population has doubled every 23 years. (For example in 1953, the population equalled 20,000; in 1976 it was 40,000; in 1999, it was 80,000 and so on).
What was the population in 1980?
Thanks for your help and time.
geomar

Click here to see answer by stanbon(26259) About Me 

Question 44796: Hello!
Can somebody help please?
The members of a computer club were to be assessed equally to raise $400 for the purchase of software.
When four more persons joined the club, the per-member assessment was reduced by $5.00.
What was the new size of the club membership?
Thanks for your help and time
geomar

Click here to see answer by stanbon(26259) About Me 

Question 44806: If f(x)=a^x and f(3)=27, find each value of f(x):
f(-1)
acrown1@umbc.edu

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Question 44702: graph the solution set of x is greater than or equal to-3



Click here to see answer by tutorcecilia(2042) About Me 

Question 44844This question is from textbook INTERMEDIATE ALGEBRA
: Solve the equation.
x 2 + 9 x + 8 = 0
This question is from textbook INTERMEDIATE ALGEBRA

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Question 44883: 1/x-1 + 1/x+2 = 5/4
Find all real solutions of the equation

Click here to see answer by Nate(3495) About Me 

Question 44888: Hello:
I am asked to solve for x
x - z = xy + w
This is a practice exam so I am given the answer of:
w + z
-----
1 - y
I do not understand how they arrived at this answer. To be honest I do not understand how to approach this problem. I can make it this far:
x - z = xy + w
x = xy + w + z
x - xy = w + z
Thank you very much for your time and help.
David


Click here to see answer by josmiceli(3003) About Me 
Question 44888: Hello:
I am asked to solve for x
x - z = xy + w
This is a practice exam so I am given the answer of:
w + z
-----
1 - y
I do not understand how they arrived at this answer. To be honest I do not understand how to approach this problem. I can make it this far:
x - z = xy + w
x = xy + w + z
x - xy = w + z
Thank you very much for your time and help.
David


Click here to see answer by stanbon(26259) About Me 

Question 44887: Hello:
I am asked to simplify (3x)^2/4y
My answer: 9x^2/4y
Answer given by the practice exam that I am working on: 9x^2/16y^2
I don't understand why 4y would be squared.
Thank you in advance for your help!!!!!
David

Click here to see answer by josmiceli(3003) About Me 

Question 44915:
Click here to see answer by Chris435435(8) About Me 

Question 44916: Use the intermediate value theorem for polynomials ot shoe that each polynomial function has a real zero between the numbers given.
; 2 and 2.5

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Question 44893: hi, my name is julie and i'm trying to find out how to do this problem, it is:
x = 1/3y + 2
-2x - y = 1
the answers that are representing x and y have to have the same numbers that can be plugged into them.

Click here to see answer by aaaaaaaa(138) About Me 

Question 44970: √3x+1+1 = x
Click here to see answer by stanbon(26259) About Me 

Question 44976: Hi, can someone help me solve these problems, and show me the steps? Thanks.
1. x^3-x^2-20x=0
2. 5x^2+3x=2
3. x(x-5)=36
This problem is an equation and I have tried to figure out the answer but I'm stuck.
4. 4a^4b+32ab^4

Click here to see answer by stanbon(26259) About Me 
Question 44976: Hi, can someone help me solve these problems, and show me the steps? Thanks.
1. x^3-x^2-20x=0
2. 5x^2+3x=2
3. x(x-5)=36
This problem is an equation and I have tried to figure out the answer but I'm stuck.
4. 4a^4b+32ab^4

Click here to see answer by checkley71(8405) About Me 

Question 45005: write the equation of the line that passes through point (1,-8) with a slope of 0.
A)x=-8
B) y=1
C) y=-8
D) x=1


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Question 45014: if a 4.4-pound bag of dog food costs $3.52, what is the cost per pound?
Click here to see answer by Nate(3495) About Me 

Question 45012: a real estate agent received a 6% commission on the sale of a home. If the home sold for $540,000, how much was his commission?
Click here to see answer by Nate(3495) About Me 

Question 45011: which of the ordered pairs is a solution for the equation 5x-4y=20?
a. (-4,-5)
b. (0,5)
c. (0,-5)
d. (-4,0)

Click here to see answer by Nate(3495) About Me 

Question 45010: Allen bought 20 stamps at the post office in 37cents and 20 cents denominations. If the total cost of the stamps was $7.06, how many 37 cents stamps did Allen buy?
a. 16
b. 18
c. 15
d. 17

Click here to see answer by Nate(3495) About Me 

Question 45009: the length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the perimeter is 29cm, find the length of one of the equal legs.
A. 11cm
b. 4cm
b. 12cm
d. 5cm

Click here to see answer by Nate(3495) About Me 

Question 45007: solve the system of equations
x+y=12
y=2x

Click here to see answer by adamchapman(301) About Me 

Question 45006: Adult tickets for a play cost $4 and child tickets cost $1. If there were 23 people at a performance and the theater collected $80 from ticket sales, how many children attended the play?
A. 19 children
b. 5 children
c. 3 children
d. 4 children

Click here to see answer by adamchapman(301) About Me 

Question 45003: find the slope of the line passing through the points (3,1) and (3,-1)
A)= 1
B)= -2
C)= undefined
D)= 0

Click here to see answer by adamchapman(301) About Me 

Question 44977: I know this one is easy, but I have been racking my brain, I am missing something so simple I know.
p=s-st solve for s
I first change the problem to
s-st=p that did not help
I got as far as
s = p+st
______

1

Click here to see answer by adamchapman(301) About Me 

Question 45028: what is 6 x square root of 2

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Question 45065: Please help to show the work
find f(-3) when f(x) = 3/x+5 - 4/x-2

Click here to see answer by Nate(3495) About Me 

Question 45061: Please help to show the work.

(1)Compute (a) (f+g)x, (b)(f*g)x, and f(g(x)) given f(x)= x^2-1 and g(x)=x+2.

Click here to see answer by Nate(3495) About Me 

Question 44978: I know this one is easy, but I have been racking my brain, I am missing something so simple I know.
p=s-st solve for s
I first change the problem to
s-st=p that did not help
I got as far as
s = p+st
______

1

Click here to see answer by Earlsdon(4898) About Me 

Question 45073: Please help to show work
absolute value 3x+1 =9

Click here to see answer by adamchapman(301) About Me 

Question 45069: Please help to show the work.

Find the distance between the points and the midpoint of the line segment connecting the point given (-3,2) and (5,2).

Click here to see answer by checkley71(8405) About Me 

Question 45071: Please help to show work
(x^2-14)^3/2=8

Click here to see answer by Nate(3495) About Me 

Question 45089: my net pay was 200.00
i want to know how was my gross income before fica tax deduction
example gross is x less (7.65% of x) 200.00 is my net pay
gross is x
less fica 7.65%
my net is 200.00

Click here to see answer by stanbon(26259) About Me 

Question 45080: Please help to show the work. This is hard.
11. The total sales, S (in billions of dollars), for electronics and appliance stores in the United States for the years 1997 to 2004 are listed in the table below. Find a linear model that represents the data. (Hint: Please use the average of the slope of the first two points and the last two points). Let t represent the year, with t = 0 corresponding to 1997.
Year Sales
1997 64.9
1998 68.5
1999 70.2
2000 76.0
2001 81.9
2002 86.4
2003 85.2
2004 90.1

Click here to see answer by stanbon(26259) About Me 

Question 45104: the difference between two numbers is 11. Twice the smaller plus three times larger is 123. What are the numbers?
please help set up

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Question 45098: Please solve the equation

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Question 45120: given f(x)=-x-4, find f(a-3).
A). a-8
B). -a-1
C). a-1
D). -a-7

Click here to see answer by Nate(3495) About Me 

Question 45119: given f(x)=5x^2-3x+1, find f(-2)
A). 15
B). 27
C). -13
D). -25

Click here to see answer by stanbon(26259) About Me 
Question 45119: given f(x)=5x^2-3x+1, find f(-2)
A). 15
B). 27
C). -13
D). -25

Click here to see answer by Nate(3495) About Me 

Question 45070: please help to show work
square root 2x-1+x=4

Click here to see answer by Nate(3495) About Me 

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, 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