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

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Question 841534: Evaluate the following without using calculator
654*23

Click here to see answer by Narsinghchauhan8960103366(17) About Me 

Question 841540: Evaluate the following without using calculator
898564+312342

Click here to see answer by Alan3354(69443) About Me 

Question 841684: (8-3p)(-2)
Click here to see answer by lenny460(1073) About Me 

Question 842065: Previous tutor misread the 25 and the radical part is still not clearly explained. {19-2[4+(9)]}-18 divided by radical 25-16
Click here to see answer by Fombitz(32388) About Me 

Question 842197: 2y+3(y-5)
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Question 842249: What is the value of 3(x-6)+2y
Click here to see answer by Fombitz(32388) About Me 

Question 842712: Expand the brackets in the following expressions.
1) (2m − 9)(5m + 4)
2) (3m − 5t)2 Square

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

Question 842721: how to solve the expression: 4r + s + 7s + 3t + 8r
Click here to see answer by Fombitz(32388) About Me 

Question 842988: A student sold her kayak and a paddle for $192, getting 5 times for the paddle as much as the kayak. what is the price of each?
Click here to see answer by faceoff57(108) About Me 

Question 842938: X minus 7 if X equal 23
Click here to see answer by Fombitz(32388) About Me 

Question 843537: a=2b=3c and abc=36, then c= ?
Click here to see answer by ewatrrr(24785) About Me 

Question 843547: x^2+2xy-2x-1
Click here to see answer by Fombitz(32388) About Me 

Question 844337: Please I need help on this problem? ASAP!!!!!
8*4^2-24/8

Click here to see answer by ewatrrr(24785) About Me 

Question 844336: Please I need help on this problem? ASAP!!!!!

8∙4^2-24/8=

Click here to see answer by ewatrrr(24785) About Me 

Question 844350: I got 27/125, and it may not be right?


(3/5)^3

Click here to see answer by ewatrrr(24785) About Me 

Question 844354: Please I need help!!!! ASAP
At a certain factory, products are made in vats that have the capacity to hold 50 quarts. If each bottle of a product contain 10/15 quart, how many bottles can be made from each vats?

Click here to see answer by ewatrrr(24785) About Me 

Question 844438: what is f(-1), if f(x)=-2x^2-5
Click here to see answer by fcabanski(1391) About Me 

Question 844780: How do you simplify 3(2y^2 +y)-2y step by step
Click here to see answer by josgarithmetic(39623) About Me 

Question 845549: True or false staement if false make the promblem true. The line through (2,2) and the origin has slope 1
Click here to see answer by Fombitz(32388) About Me 

Question 845936: x^2+4x =
By factorizing?

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

Question 847051: Which of the following is not a question to ask when determining whether an expression involving exponents is completely simplified?
Click here to see answer by Fombitz(32388) About Me 

Question 847106: Translate the following phrases into mathematical expressions:
#1. (-8) subtracted from 4 first, and then that total divided by 4.
#2. 5 multiplied by 9 first, and then 6 added to that total.

Thanks for the help, need answers ASAP. Already have answers in mind and want to make sure they are correct. Thank you!
P.S.
If you wanted to know what I thought the answers were, here are my conclusions:

For #1: [4-(-8)]/4 ...(by the way, the forward slash means divided by)
For #2: 5*9+6 (this one was easier)

Click here to see answer by ewatrrr(24785) About Me 

Question 409167: I have been studying all day and doing practice problems from my math book to get me ready for a test. I am stuck at 3.1 in my book. I am to this point and i do not understand how to solve a problem like the following:
simplifying expressions:
3+6(w+2)+w
I know I have to use the distributive property, Where I am confused is what do I do with 3+6 Do i add this and then use the answer to distribute over (w+2) and then add +w? I just really need to know the steps so that i can practice more problems like these

Click here to see answer by richwmiller(17219) About Me 

Question 848945: Refer back to Week One Discussion and use the names and ages of yourself and the other two people you selected. Make sure one is older than you and one is younger than you.
Me- 28 years old, my brother 30 and my son 4
In years, how old was the older person when you were born? 2
this is where I'm having trouble...........
1.)Write an equation that models how old in years each of you will be, when your ages add up to 150 years old. For example, if x = your age and the eldest person was a year older than you, you would write their age as x + 1. Then the equation would be: x + (x+1) = 150.
Explain the reasoning which helped you develop your equation.
2.)Solve for your future ages. Are your answers reasonable, do they add up to 150?
In years, how old were you when the youngest person was born?
3.)At some point during the lives of you and the youngest person, your age will be three times his/her age at that moment. Write an equation which models how old in years each of you will be when you are three times as old as the younger person.
Explain the reasoning which helped you develop your equation.
4.)
Solve the equation for your ages when you are three times as old as the youngest person. Are your answers reasonable?

Click here to see answer by richwmiller(17219) About Me 

Question 850076: Write the equation of the line with the slope = -2/5 that passes through the point (-2, 6)
Click here to see answer by Fombitz(32388) About Me 

Question 851128: If the velocity is given by v=t^2+at-1
+differentiate+v+to+find+the+acceleration+ dv%2Fdt+

Click here to see answer by ewatrrr(24785) About Me 

Question 851395: How do you evaluate the expression of 4 - 12 + 3 = and 4 + 7 (2-1) to the second power
Click here to see answer by rvfer(117) About Me 

Question 851683: fraction that's equivalent to 4/9 and has a denominator of 72
Click here to see answer by ewatrrr(24785) About Me 

Question 851691: simplify (1/4)to the 2nd power divided by (2 1/2 - 3/4) + 5
Click here to see answer by ewatrrr(24785) About Me 

Question 851680: divide: -2 1/2 div 1 2/7
Click here to see answer by Fombitz(32388) About Me 

Question 851721: I have 6 3/10 cups of butter and used 2 4/5 cups. how much is left?
Click here to see answer by Alan3354(69443) About Me 

Question 851722: Algebra 2 question! Help me please! I have a test on this stuff later today and I am very confused. Please just show all of your steps and explain in detail thanks!
Consider the infinite geometric series :
infinity
E -4(1/3)^n-1
n=1
Write the first four terms of the series.
Does the series diverge or converge?
If the series has a sum, find the sum.
Thank you!!

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

Question 851748: Evaluate y in the following problem when x = 7:
(y = 2x - 9)

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

Question 852027: I need to show this as L=....
5/(2+L)=h/L
I have a lot of workings but can't solve it. Pity I can't take a picture to show you.
I hope you can reply within 7hrs...
Thanks
Alison

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

Question 852501: 7(3w-5)
Click here to see answer by LinnW(1048) About Me 

Question 850900: Simplify :
(-3w^2)(w-3)^2

Click here to see answer by richwmiller(17219) About Me 

Question 853370: Please help me solve this equation:
1/2y + 4 ÷ 2 = 5, the value of y is 21.True or False

Click here to see answer by Alan3354(69443) About Me 
Question 853370: Please help me solve this equation:
1/2y + 4 ÷ 2 = 5, the value of y is 21.True or False

Click here to see answer by Nnamdi(4) About Me 

Question 853367: Please help me solve this equation:
1/2y ÷ 3 = 2, what is the value of y?
Thank You

Click here to see answer by LinnW(1048) About Me 

Question 853384: Please help me solve this expression:
1/3y + 4 ÷ 2 = 5, the value of y is 21.(a)True(b)False

Click here to see answer by rothauserc(4718) About Me 

Question 851720: subtract - 3/8 from 7/12
Click here to see answer by Nnamdi(4) About Me 

Question 854249: Can someone please help me with this question. Thank you so much
Factorise each of the following expressions, that is, write them as a product.
a.)8b^3a^2-4a^4b^3+16a^5b^5
b.)4x^2(a+b)+4x^2(a-b)

Click here to see answer by mananth(16946) About Me 
Question 854249: Can someone please help me with this question. Thank you so much
Factorise each of the following expressions, that is, write them as a product.
a.)8b^3a^2-4a^4b^3+16a^5b^5
b.)4x^2(a+b)+4x^2(a-b)

Click here to see answer by Theo(13342) About Me 

Question 854252: I really need help with this question. Can someone help me please..thank you
Write each of the following expressions as one fraction, such that numerator and denominator do not have any common factors.
a.)(5x^2y^2+x^2)/x ÷ (5y^2+1)/4x+2y
b.)(1+b)/5 + 3/a^3

Click here to see answer by Seutip(231) About Me 

Question 854239: Hi, can you please help me with one surd expression and explain the answer to the second surd expression? (I'm sorry if the topic is wrong)
Firstly, the questions states, "Expand and simplify: -3√6 (2√3 - 3√8)." My calculator says the answer is 36√3 - 18√2, yet my answer is always -6√18 - 9√48. I don't understand what I'm doing wrong.
Secondly, I am having trouble understanding this example, "Given that x = 5√2 - 3, find x-1/x." The answer to this question is:
x - 1/x = 5√2 - 3 - 1/5√2-3
= 5√2 - 3 - (5√2 + 3/41)
=(5√2 - 3)/1 * 41/41 - (5√2 +3/41)
= 205√2 - 123 - (5v2 + 3)/41
= 200√2 - 126/41
What I don't understand is where the 41 comes from.
Thank you so much for your help in advanced!

Click here to see answer by dkppathak(439) 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