Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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Question 147175: simply {4x(3y-16x)}-(3x-2y)
Click here to see answer by checkley77(12844) About Me 

Question 147174: simply {4x(3y-16x)}-(3x-2y)
Click here to see answer by jim_thompson5910(35256) About Me 

Question 147466: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.

Click here to see answer by stanbon(75887) About Me 
Question 147466: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.

Click here to see answer by vleith(2983) About Me 

Question 147474: 19-(2x+3)=2(x+3)+x please tell me if i did this right.
19-2x-3=2x+6+x
16-2x=3x+6
10-2x=3x
10=5x
x=2

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Question 147565: 3xy-4x+y
x equals -3 and y equals 2
both the 4x and y are squared

Click here to see answer by jim_thompson5910(35256) About Me 

Question 147602: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.

Click here to see answer by jim_thompson5910(35256) About Me 
Question 147602: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.

Click here to see answer by oscargut(2103) About Me 

Question 147855: Evaluate the expression 17-(-x)- -10 when x=3
Click here to see answer by vleith(2983) About Me 

Question 147912: 4/3 x(6/5)
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Question 148630: please help have admission test for new job in 2hours.
A=B+3(4-C)
if B=5 and C=2

Click here to see answer by vleith(2983) About Me 

Question 148751: At a well known university, Ό of the undergraduate students commute and 1/3 of the graduate students commute. One-tenths of the undergraduate students drive more than 40 miles daily and 1/6 of the graduate students drive more than 40 miles daily. If there are twice as many undergraduate students as there are graduate students, then what fraction of the commuters drive more than 40 miles daily? Please help? Is this how to do it?
The fraction of the undergraduate and graduate students who commute is represented by 1/4x +1/3x divided by 1/10x +40 divided by 1/6x + 40. (I'm stuck)

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 148749: simplify the complex fraction. reduce to lowest terms.
4ab^5/a+b/6a^2b^4
Please help!!

Click here to see answer by jim_thompson5910(35256) About Me 

Question 149149: Evaluate: |–11 – 4| – |1 – 5|
Click here to see answer by mangopeeler07(462) About Me 

Question 149561: 6(t+3) + 8 - 5(t + 2)= can you tell me the steps to figure this out
Click here to see answer by Fombitz(32388) About Me 

Question 149590: Simplify the expression 12x+10 over 2
Click here to see answer by jojo14344(1513) About Me 
Question 149590: Simplify the expression 12x+10 over 2
Click here to see answer by jim_thompson5910(35256) About Me 

Question 149955: I am totatly lost with evaluating please help.
problem: 26) 2/3 ab, for a = 7 and b = 4 1/5
27) 4 + mn, for m = 7 2/5 and n = 3 1/4

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Question 150205: please help
3/5 + 1/3 T=2/5
T=(answer)
Thanks

Click here to see answer by stanbon(75887) About Me 

Question 150242: How do I solve the equation x/3-x-3/7=-1?
Click here to see answer by Alan3354(69443) About Me 

Question 150328: –6 + 7(x – 1) = 2x + 5(x – 6) – 4
Click here to see answer by checkley77(12844) About Me 

Question 150319: 4(x – a) – (16b – x) = a – b solve for x
Click here to see answer by edjones(8007) About Me 

Question 150558: I’m supposed to solve the below expression for X, but I can’t figure out what I’m doing wrong. I believe your supposed to multiply by the LCD to remove the fraction term. Then when I calculate, I’m completely lost. Maybe I’m using the wrong LCD.

Problem is x+3/6 - x/5 = 9x-5/30
LCD is 30, so I multiplied each term by 30
5(x+3) – 6x = 9x – 5
5x + 15 – 6x = 9x – 5
-x + 15 = 9x – 5
15 = 10x – 5
20 = 10x
x=10
*Answer in my book is x=2

Problem is: 4/x + 2/x+1 = 5
LCD is x(x+1), so I multiplied each term by x(x+1)
4(x+1) + 2x = 5x(x+1)
4x + 4 + 2x = 5x^2 + 5x
6x + 4 = 5x^2 + 5x
4 = 5x^2 + 5x – 6x
4 = 5x^2 – x
*Answer in my book is x=1

Problem is 24/8x - x/3 = 3-x/6
LCD is 24x, so I multiplied each term by 24x
72 – 8 = 4x(3-x)
72 – 8 = 12x – 4x^2
64 = 12x – 4x^2
*Answer in my book is x=3 or x=6

Problem is 6/4(x-2) + 1/4 = 4/x
LCD is 4(x-2), so I multiplied each term by 4(x-2)
6 + x – 2 = x(x-2)
4 + x = x^2 – 2x
4 + x = 0
x = -4
*Answer in my book is x=3 or x=6

Click here to see answer by jim_thompson5910(35256) About Me 

Question 150702: my brother is 8 years older than me .write an expression for the age of my brother .
Click here to see answer by jim_thompson5910(35256) About Me 

Question 150792: Write a formula that expresses the relationship described below.
P varies jointly as x and y and P = 7 when x = –1 and y = –6.


I'm not sure, but I think it would be P = 6/7xy

Click here to see answer by mangopeeler07(462) About Me 

Question 150964: 5 plus the product of 5 and 2
Click here to see answer by jim_thompson5910(35256) About Me 

Question 150965: 6 times of the difference of x and 4
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Question 150963: the quotient of 12 and a number of h
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Question 150962: Cheryl and her friends buy a pizza for $15.00 plus a delivery charge of d dollars. If delivery charge is $2.50. What is the total cost?
Click here to see answer by jim_thompson5910(35256) About Me 

Question 151004: Expand and simplify
5-(3-4x)

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Question 151148: what is 3 less than thrice a number?
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Question 151269: How do I simplify this +-4b%282a+-+6b%29+%2B+5%287ab+-+2b2%29+
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Question 151279: 4x%5E3-54x%5E2%2B180x-125=0

Click here to see answer by mangopeeler07(462) About Me 

Question 151406: Multiply:
((x^2+x-12)/(x^2-x-20))X((x^2+2x-35)/(x^2+9x+14))

Click here to see answer by jim_thompson5910(35256) About Me 

Question 151639: Will you help solve this euation 6+4*8-(-3)*8/6
Click here to see answer by checkley77(12844) About Me 

Question 151658: Can somebody help me please?
7. If P = 3y + 7xy - 2x and Q = 9 - 2y, find the value of 3P - 4Q

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Question 152009: 3x+5(2x-11)=2+9x
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Question 152008: 1/2x-5/3=3/4
Click here to see answer by jojo14344(1513) About Me 

Question 152006: x/6+5=2x/3
Click here to see answer by checkley77(12844) About Me 

Question 152007: 3x/4+5=2x/3
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Question 152073: -20-3x+3x^2=0
I can't seem to find the right way to factor it!

Click here to see answer by Earlsdon(6294) About Me 

Question 152230: PLEAS HELP TO ADD GROUPING SYMBOLS TO THIS EXPRESSION TO COME OUT TO 279,936-THANKS 2*3^3+4
Click here to see answer by nerdybill(7384) About Me 

Question 152619: 1 The sum of two numbers is 12. One number is 5 times the other. Can you write the algebraic expressions for these two equations? Can you tell me what the two numbers are?
I know it is 10 and 2 but need all algebraic expressions
2. We know that if you multiply two negative numbers together you always get a positive number. We know that if you perform an arithmetic operation on rational numbers you always get a rational number as the answer. Are there any such rules for irrational numbers? Give examples.

Click here to see answer by Fombitz(32388) About Me 

Question 152740: hi.. I'm homeschooled and I ran acrossed a question today that Im' really having a problem with. the equation is this. 1/3 (1/2 x 3 1/3)- 5/6
thanks for your time.

Click here to see answer by nerdybill(7384) About Me 

Question 153179: I would want to know step by step of how to simplfy ecuation and to reduce the expresion?
1 4(2x-1)-6(x+3)
2 6a-2a+5=17
3 4(8-3w)=32-8(w+2)

Click here to see answer by oscargut(2103) 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