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

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 Algebra: Evaluation of expressions, parentheses Solvers Lessons Answers archive Quiz In Depth

 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 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 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 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 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 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 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)