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

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Question 35707: x^2+xy-y^2
__________
x+y
when x=6 and y=-2
Click here to see answer by fractalier(2101)

Question 37733: The problem is (5 1/2)/ (4 3/4)
This is for an online algebra class. I tried to follow the example which shows how to change the mixed fraction into a improper fraction adn then you multiply to get you answer. When I did that i came up with 5/7*7/3 but you flip the second fraction adn you get 3/7*5/7 and that gave me 15/49. But these are multiple choice questions and that answer was not one of the ones that i can choose from. I did the problem many more times and still have not come up with an answer that is one of my choices. If it helps my choices are: 22/19 19/22 110/8 12/5 209/8 13/4 Can you help me with this problem? The lesson is mixed expression and complex fractions
Click here to see answer by Earlsdon(6287)

Question 37945: Combine like terms: 6X2 + 3X -2 + 2X2 – X + 7
A) 10X + 5 B) 8X2 + 2X + 5 C) 4X2 + 4X – 9 D) 10X + 9

Click here to see answer by checkley71(8403)

Question 37944: Multiply (X2Y2)(X2Y)
A) 4X2Y B) XY2X2Y C) 2X2Y2Y D) X4Y3
Click here to see answer by checkley71(8403)

Question 37944: Multiply (X2Y2)(X2Y)
A) 4X2Y B) XY2X2Y C) 2X2Y2Y D) X4Y3
Click here to see answer by fractalier(2101)

Question 37940: Evaluate | 3 | + | -4 |
A) 1 B) -1 C) 7 D) -7
Click here to see answer by fractalier(2101)

Question 38145: Given f (x) = 4x + 4, find f (x + 2)
A) 3x + 2 B) 4x + 6 C) x + 6 D) 4x + 12

Click here to see answer by Nate(3500)

Question 38144: Given f (x) = 5x^2 – 12x + 3, find f (-2)
A) -41 B) -43 C) 47 D) 49

Click here to see answer by Nate(3500)

Question 38148: 3x + 7y = 1 x + 2y = 1 A) solution = (4,9) B) solution = (5,-2) C) solution = (1,1/2) D) solution = (1/3 , 1/7)

Click here to see answer by AnlytcPhil(1277)

Question 38146: Rewrite the equation -2X + 3Y = -15 as a function of X.
A) f(x) = 2/3x – 5 B) f(x) = 2x – 15 C) f(x) = -3y – 15 D) f(x) = 3/2y + 7.5

Click here to see answer by checkley71(8403)

Question 38251: find (f . g)(x) and (g . f)(x) for each function
f(x)=-6x+9, g(x)=5x+7
f(x)=4x^2+2x+8, g(x)= x+5
f(x)=2/x^4, g(x)=2square root x+2
f(x)=8x+12, g(x)=3x-1
f(x)=5x+3, g(x)=-x^2+4x+3
f(x)=1/x, g(x)=8x^2-6
Click here to see answer by lyra(94)

Question 38250: 8/3p+5/4p+9/2p
1/x+3-1/x/1/x
2x^2+2=5x
x^2-4x-1=0
x^2-3x-4is greater than or equal to 0
the absolute value of x+3 = absolute value of 2x
y=3/2x-4
y=-2x+1
Click here to see answer by lyra(94)

Question 38356: Evaluate. 4 · 2^2 - 2 · 8
Click here to see answer by fractalier(2101)

Question 38171: Find the sum of the fcllowing geometric series.
8 + 12 +..... + 60.75
Click here to see answer by venugopalramana(3286)

Question 36798: I need to evaluate the problem, I can't seem to come up with the answer, I guess maybe i didn't quite understand how you solve these. When i do it the way the textbook shows to do similar problems, i get the wrong answer, please help, thanks
Click here to see answer by Evy(14)

Question 38476: When simplifying expressions, how are like terms determined?
Click here to see answer by fractalier(2101)

Question 38474: Why must units of an expression be the same in order to be combined?
Click here to see answer by lyra(94)

Question 38244: 3-(4-5)+(-5)x6+14
_________________
4(-1-2)
Click here to see answer by lyra(94)

Question 38856: evaluate the following expression
ab to the negative 1st power over c
Click here to see answer by fractalier(2101)

Question 38858: what is the slope of the graph of this linear equation in two variables
3y + 18x = 21
Click here to see answer by fractalier(2101)

Question 38980: Find the zeroes
20.(x + 5)(2x - 1) =0
21.x(3x+4)(7x+5) = 0
Click here to see answer by Nate(3500)

Question 39041: 5(x+5)=25+5x

a) -5 b) 0 c) all real numbers d) no solution
Click here to see answer by KneesAndToes(13)

Question 39048: Simplify: 2x + 7(x+7) a) -5x + 49 b) 9x + 7 c) 9x + 49 d) 9x-49
Click here to see answer by checkley71(8403)

Question 39051: solve -3(x-1) = 12 +6x a)-1 b)0 c) all real numbers d) no solution
Click here to see answer by stanbon(57361)

Question 39051: solve -3(x-1) = 12 +6x a)-1 b)0 c) all real numbers d) no solution
Click here to see answer by checkley71(8403)

Question 39056: solve -3(x+2)= 3(2-x) a) 2 b) 0 c) all real numbers d) no solution
Click here to see answer by checkley71(8403)

Question 39060: simplify: 11(x+1) - 6(x+1) a) 5x+17 b) 11x-17 c)11x-5 d) 5x+5
Click here to see answer by checkley71(8403)

Question 39332: simplify 9(x-1) - 5(x-1) a 4x-4 b 9x-14 c 9x-4 d 4x-14
Click here to see answer by checkley71(8403)

Question 39317: which is equivalent to 2 to neative 4 power a) -16 b) 16 c) -8 ) 1/16
Click here to see answer by checkley71(8403)

Question 39316: simplify: (-2) to third power a) -6 b) 6 c) 8 d) -8
Click here to see answer by checkley71(8403)

Question 39313: Simpliy: w to fourth power over w to second power a) w to 1/2 power b) w to eighth power c) w to sixth power d)w to second power
Click here to see answer by checkley71(8403)

Question 39312: simplify: -(-2)to sixth power
Click here to see answer by checkley71(8403)

Question 39382: I am a beginner.
I am stuck on correct answer for finding one of the factors of:
X^2 + X - 6 =
I am not using a specific book. I am just practicing...........
Click here to see answer by venugopalramana(3286)

Question 39538: Simply each of the following expressions where possible (pg. 150)

I can't really type it out on my computer but the numbers are on the left side of the letter.
6x2y3 + 9x2y3
________________________________
3x2y2
Click here to see answer by fractalier(2101)

Question 39315: simplify 4x-5(x-7) a -x + 35 b) -x-35 c) -x-7 d) 9x+35
Click here to see answer by fractalier(2101)

Question 39608: I'm lost on how to evaluate each of the expessions. Thank you so much for your help
b then 2 above the b - 2bc + c then 2 above the c

Click here to see answer by stanbon(57361)

Question 39616: 4b+5d - c over a

Click here to see answer by AnlytcPhil(1277)

Question 39606: I'm lost on how to evaluate each of the expessions.

4b + 5d - c over a
Click here to see answer by fractalier(2101)

Question 39782: HOW56 CAN I SOLVE FOR THE X ON THIS THANKS ' I BY ACCIDENT WROTE DOWN THE WRONG PROBLEM TOTALLY DIFFERENT. I'M LOST THANK YOU

-4 (2x -3) -8x + 5
Click here to see answer by checkley71(8403)

Question 40054: Combine like terms.
5w + 5x – 9w

A) w + x B) 10w – 9x C) –4w + 5x D) wx

Click here to see answer by fractalier(2101)

Question 40054: Combine like terms.
5w + 5x – 9w

A) w + x B) 10w – 9x C) –4w + 5x D) wx

Click here to see answer by dyonak(3)

Question 40053: Which property of the real numbers is illustrated by the following statement?
7 · 3 = 3 · 7
Click here to see answer by fractalier(2101)

Question 40051: Evaluate b2 – 2bc + c2 if b = 3 and c = –2.

im coming up with 17..am i right
Click here to see answer by fractalier(2101)

Question 40051: Evaluate b2 – 2bc + c2 if b = 3 and c = –2.

im coming up with 17..am i right
Click here to see answer by dyonak(3)

Question 40050: is this a expression
y + · w
Click here to see answer by fractalier(2101)

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