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

Tutors Answer Your Questions about expressions (FREE)

Question 100118: Hello, I need you help with one problem. I just don't have a real example.
2x-1 > 6x - 5
-

Thank You,
Click here to see answer by bucky(2189)

Question 100227: If a = -3 and b = 4, evaluate 3a - 4b.
Click here to see answer by tutorcecilia(2152)

Question 100285: I am trying to figure out simplifying expressions like the one in this problem (-3)to the 5th power (numerator) over (-3) to the third power(denominator) and 64a to the seventh power b to the eighth power(numerator) over 8a to the fourth power b to the fourth power(denominator). Sorry, I don't know how to raise the powers above the numbers on the keyboard.

Click here to see answer by tutorcecilia(2152)

Question 100432: 12-4(-8v+17)
Click here to see answer by checkley71(8403)

Question 100432: 12-4(-8v+17)
Click here to see answer by jim_thompson5910(28504)

Question 100443: 3[16-(3+7)divided by 5]
Click here to see answer by checkley71(8403)

Question 100475: Bricklayers use the formula N=7LH to estimate the number of bricks N needed to build a wall of height H and length L.
What is the height of the wall that is 30 feet long and that requires 2310 bricks to build?
Click here to see answer by elima(1433)

Question 100614: A discount store bought 12 dozen radios,each to be sold at $15 above cost. The store sold x of the radios at that price. Each of the remaining radios wassold at $4 below cost. If the store paid $11 for each radio, what was the total income from the sale? (hint: income=sales-cost)
Click here to see answer by checkley71(8403)

Question 100679: k+32fork=15
Click here to see answer by stanbon(57250)

Question 100688: simplify each expression. 5(6-y)-2
Click here to see answer by oberobic(2304)

Question 100712: (7w+4x)-(3w-z)+(x+z)
Click here to see answer by edjones(7569)

Question 100764: Open-Ended Write a problem you could represent with 3k-12=6. Solve the equation and show your solution.
Click here to see answer by chitra(359)

Question 100982: I need to insert parentheses in the equation to make it true:
30 divided by 2 + 4 x 2 + 7 = 10

and
30 divided by 2 + 4 x 2 + 7 = 51
Click here to see answer by Moni(1)

Question 100887: I'm taking a elementary and intermediate algebra in college. It's been a very long while since I have done algebra. I'm trying to figure out where do I start first within this expression
[3-(2-4)][3+|2-4|]
also
8-3|5-4 2ndpower + 1|
Click here to see answer by bucky(2189)

Question 100944: i need to justify each step. 5(n+4)+9=(5n+20)+9n
=5n+(20+9n)
=5n+(9n+20)
=(5n+9n)+20
=(5+9)n+20
=14n+20

Click here to see answer by elima(1433)

Question 101106: (1*2*6)/(1-1)*a
Click here to see answer by stanbon(57250)

Question 101353: 2LM x LMNL
Click here to see answer by jim_thompson5910(28504)

Question 101678: Could you please solve this equation?
Eight times a number plus 6 less than twice the number is 34
Click here to see answer by scott8148(6628)

Question 102051: find the midpoint between these points:
(-3,7) and (4, -5)
Click here to see answer by jim_thompson5910(28504)

Question 102514: 2x-3+4x-3
Click here to see answer by jim_thompson5910(28504)

Question 102365: 26 less than twice a number b
Click here to see answer by elima(1433)

Question 103057: 2x-5y,x=-9 and y=9
Click here to see answer by karabear(1)

Question 103177: 5(x+2)= 2x+16
Click here to see answer by edjones(7569)

Question 100946: i need to justify each step. 5(n+4)+9=(5n+20)+9n
=5n+(20+9n)
=5n+(9n+20)
=(5n+9n)+20
=(5+9)n+20
=14n+20

Click here to see answer by BurningFlame_marc(77)

Question 101954: Solve:
5[3(7-t)-4(8+2t)]-20<-6[2(6+3t)-4]
*the less than sign (<) is actually a less than or equal to sign but I didnt know how to make that on the computer. thank you
Click here to see answer by BurningFlame_marc(77)

Question 103620: John is traveling to a meeting that is 28 miles away. He needs to be there in 30 minutes. How fast does he need to go to make it to the meeting on time?
Click here to see answer by stanbon(57250)

Question 103641: problem needs to be simplified completely
1 2x - 3 5
--- - ------ + ---
2 3x2 6x

Click here to see answer by Fombitz(13828)

Question 103669: Could you help me to simplify with positive exponets
(27x^6y^3)^(1/3)
Click here to see answer by stanbon(57250)

Question 103639: problem needs to be simplified completely
1 2x - 3 5
--- - ------ + ---
2 3x2 6x

Click here to see answer by ankor@dixie-net.com(15639)

Question 103829: Could you please help me to factor this to the lowest and simplest form. thank you so much.
12x^2y^2 + 10xy^2 – 42y^2
Click here to see answer by MathLover1(6623)

Question 103829: Could you please help me to factor this to the lowest and simplest form. thank you so much.
12x^2y^2 + 10xy^2 – 42y^2
Click here to see answer by stanbon(57250)

Question 103840: Could you please help me simplify this problem with positive exponets?
(2x3/4 y -1/2)-8
Click here to see answer by stanbon(57250)

Question 103863: I was unable to type the greater than and equal to sign there in the middle. I am having trouble trying to solve and simplify this problem. Could you help please?
4(x + 2) > 8(x - 2) - 12
Click here to see answer by edjones(7569)

Question 103906: Have you any suggestions on how to work this problem to its simplest form? thanks 2x2 - 26x = 60
Click here to see answer by checkley75(3666)

Question 103906: Have you any suggestions on how to work this problem to its simplest form? thanks 2x2 - 26x = 60
Click here to see answer by Earlsdon(6287)

Question 103921: I have spent over two hours trying to figure this problem out. I am sure it is to be solved in matrix form, but I am not even sure what the question is asking for.
Product X, overhead $1,500 and cost $20 each to produce which sell for $30 a piece.
A. R(x) = B. C(x) = C. P(x) = D. Break even x =

Really I do not know what the book is asking and how to go about it. Have you any ideals?
Thank you

Click here to see answer by stanbon(57250)

Question 103748: Evaluate b^2-2bc+c^2 if b=3 and c=-2
Click here to see answer by rmromero(383)

Question 103953: My text book is asking a question that I have no idea how to answer. It says consumption, (c) is to be linear and that it is a function of (x), income. It is saying to write the consumption function. Here is the information provided:
Consumption (c) = $18 million
Income (x) = $12 million
&
Consumption (c) = $24 million
Income (x) = $18 million
Any thoughts on this , thanks.

Click here to see answer by jim_thompson5910(28504)

Question 103957: Having trouble working out the problem I know the answer is 9 for a
logically but how do you work it out to show.this is the problem
3a=1 divided by 5 equals 2
Click here to see answer by Earlsdon(6287)

Question 104028: Write the following phrase using symbols. Use the variable x to represent the number. Eight less than three times a number.Help me with this please.

Click here to see answer by jim_thompson5910(28504)

Question 104306: -3(2z-8)=10z=16
Click here to see answer by elima(1433)

Question 104334: 2=4(3K-8)-11K
Click here to see answer by elima(1433)

Question 104334: 2=4(3K-8)-11K
Click here to see answer by sakhi(3)

Question 104478: 7 a raised to 3 b raised to 2,when a=1/2 and b=1/3
Click here to see answer by ankor@dixie-net.com(15639)

Question 104811: I need help solving these equations- the last two I need to solve and graph. getting started on the 1st one I got as far as 21k-15 =12 I am thinking that the solution would be 3k. On the 2nd question- arrived at: 15-5x < 3x-9, where do I go from here? Last: Not sure how to solve the last one. Please help!

3/4 (7k - 5)=12

5(3-x)< 3(x-3)

3x + 2 < 5''.

Click here to see answer by edjones(7569)

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