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

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Question 1058132: May you please help me with this:
The sum of the digits of a two-digit number is 6. When the digits are reversed, the number decreases by 18. Find the original number.

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Question 1058132: May you please help me with this:
The sum of the digits of a two-digit number is 6. When the digits are reversed, the number decreases by 18. Find the original number.

Click here to see answer by MathTherapy(10555) About Me 

Question 1058301: If 2^x=3, evaluate 2^(x+1)
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Question 1058847: Log base2 of 3 =a find the value oflog base 8 of 27

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Question 1059030: Please simplify the following expressions:
(-x)^2 (-x)^5=
(x/y)^-3=
(-3m^3)^2=
Thank you.

Click here to see answer by Boreal(15235) About Me 

Question 1058867: Hello!
Im new here i apologize in advance if im not supposed to send links,i just thought it would be esasier.
If you can't click on them then just copy and paste them on google and it should show.
I need to evaluate each expression and write the product in the simplest form.
http://i.imgur.com/6m0HAlw.jpg
I would also like to ask if i could send you more problems since i need much help but if not then it's okay.Thank you!!!

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

Question 1059207: How do I evaluate this expression and put the answer in scientific notation?
9.6x10^2/3.2x10^5

Thank you for your help.

Click here to see answer by Boreal(15235) About Me 

Question 1059208: How do I evaluate the expression and show the answer in scientific notation?
(2.5x10^-2)^4

Thank's very much.

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Question 1059282: The quotient of 20 and a number
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Question 1059576: Five times the difference of twice a number and seven is negative 5. Find the numbers.
Click here to see answer by Cromlix(4381) About Me 

Question 1059709: Six times a number plus seven times the number

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Question 1059552: A wooden piece 90 cm long is cut into two pieces of different lengths. The longer piece, a, is used to form a rectangle with width x cm and length y cm, and the shorter piece is used to form a square with side z cm, such that the rectangle and the square have the same areas. Prove that x+y=a/2, and z=(90-a)/4.
Any help is appreciated! If it is possible, could you draw a diagram? Thanks!

Click here to see answer by josmiceli(19441) About Me 

Question 1060113: Solve: sqr(x+2)=2-x
I got: (5+-sqr17)/2, but the answer is (5-sqr17)/2
Why?

Click here to see answer by ikleyn(52832) About Me 
Question 1060113: Solve: sqr(x+2)=2-x
I got: (5+-sqr17)/2, but the answer is (5-sqr17)/2
Why?

Click here to see answer by josgarithmetic(39623) About Me 

Question 1060100: Find the natural domain of y=1/sqr(-(2-x))
Thanks!

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Question 1060244: 3x+5=4
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Question 1060655: equivalent expresion 2x+5x+2x
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Question 1061549: 6÷2(1+2) what is the answer
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Question 1061656: Use the distributive property to rewrite each algebraic expression 8 (x+7)
Click here to see answer by Edwin McCravy(20060) About Me 

Question 1062327:
How do I completely factor this expression?
4x^2 + 8x -12 + 6x

Thank you for the help.

Click here to see answer by Alan3354(69443) About Me 
Question 1062327:
How do I completely factor this expression?
4x^2 + 8x -12 + 6x

Thank you for the help.

Click here to see answer by ikleyn(52832) About Me 

Question 1062328: How should I completely factor this expression?

144-9p^2

Thanks

Click here to see answer by Alan3354(69443) About Me 
Question 1062328: How should I completely factor this expression?

144-9p^2

Thanks

Click here to see answer by math_helper(2461) About Me 
Question 1062328: How should I completely factor this expression?

144-9p^2

Thanks

Click here to see answer by ikleyn(52832) About Me 
Question 1062328: How should I completely factor this expression?

144-9p^2

Thanks

Click here to see answer by MathTherapy(10555) About Me 

Question 1062513: I am trying to figure out the solution to this problem. 14a+56b+7
Click here to see answer by solver91311(24713) About Me 

Question 1062634: What is the sum of twenty and fifteen
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Question 1062635: What is the sum of twenty and fifteen
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Question 1062897: −3(2−0.4y)+5.6=0.4(3y+1)
y=?

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Question 1063104: 3 more than a certain number is 6 less than 4 times the same number, hoiw do you put this into a equation?
Click here to see answer by ikleyn(52832) About Me 

Question 1063291: 5{2[5(8+3)+6]} can you explain how to solve this problem step by step. I don't understand braces, do I multiply by 5 since 5 is next to the brace?

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

Question 1063537: What is the transformation that occurs to the equation y=2^x if it changes to y=2^(x+8)+4
Show all steps, please!!

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Question 1063582: x-5/6=80 what does x mean

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Question 1063609: On her way to work, Ms. Bowman waited 20 minutes at a subway station. The train ride took her (x+30) minutes to reach Grand Central Station. Then, she walked for another 1/3x minutes before reaching her office. How much time, in minutes, did Ms. Bowman take to travel to her office?
Click here to see answer by ikleyn(52832) About Me 

Question 1063640: Please help me solve: substract 5a square -2a -1 from 8a square -a.
Click here to see answer by Alan3354(69443) About Me 

Question 1063784: 124-6*0+15=34, WHERE DO I PLACE THE PARENTHESIS?
Click here to see answer by Theo(13342) About Me 

Question 1063866:
Please simplify the expression,if possible. State the excluded values,if any.
w^2 + 4w + 4 / 2w^2 -8.
Thank you.

Click here to see answer by Alan3354(69443) About Me 
Question 1063866:
Please simplify the expression,if possible. State the excluded values,if any.
w^2 + 4w + 4 / 2w^2 -8.
Thank you.

Click here to see answer by ikleyn(52832) About Me 

Question 1064019:
2/(b-2)=b/(b^2-3b+2)+b/(2b-2)

Thank you.

Click here to see answer by josgarithmetic(39623) About Me 

Question 1064018:
Simplify the expression and solve the equation.
((v^2+6v+8))/((v^2+v-12))/(v+2)/(2v-6)

I hope that I wrote this correctly.
Thank you.

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

Question 1064090: Am I correct that the answer to this problem is A?
A factor of tan²x + 2tan(x)cos(x) + cos²(x) is
A.) tan(x) + cos(x) -- ans?
B.) tan(x) - cos(x)
C.) 2tan(x) - cos(x)
D.) A & B

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Question 1064256: What expression would you add to -4y + 2 to have a sum of y?
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Question 1064256: What expression would you add to -4y + 2 to have a sum of y?
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Question 1064256: What expression would you add to -4y + 2 to have a sum of y?
Click here to see answer by MathTherapy(10555) About Me 

Question 1064927: Speed of light is 3 x10^8 m/s. At this speed, how long a stars light will take if the star is 8 light years away?
Click here to see answer by josgarithmetic(39623) 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