# 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 1756: i dont knoww how to do this 3/4multiplyed (8x+negitive20}=1/2times(neg.16x+neg.4)+1 can u help me please! Click here to see answer by cakst(2)

 Question 1764: The formula used to calculate the percentage of body fat for men is %Body fat = (-98.42 + 4.15w -0.082b)/b. What is the body fat for a man weighing 156(b) pounds and waist measurement(w) 32 inches. Click here to see answer by longjonsilver(2297)

 Question 1818: what is an arrangement of numbers, operations, and grouping symbols called? Click here to see answer by longjonsilver(2297)

 Question 1993: I have no idea where to start. How do I start to evaluate this? Do you believe that the following equation could be true? (-1 + or - square root of 5) / -1 = -1 + or - the square root of 5 Can you explain your conclusion. Click here to see answer by longjonsilver(2297)

 Question 4395: I am having a very hard time understanding the addition property of equality. for axample 3x - 5 + 2x - 7 + x = 5x+2 The book says that the answer is 14, but how do you reach that point? Click here to see answer by arunpaul(104)

 Question 4821: When working equations with parenthesis, what is the rule for the "sign" in front of the parenthesis? Example #1: 2x + 5x -3(4 + 3) = -21; will the plus sign inside of the parenthesis become a minus (negative) sign and the negative sign in front of the 3 outside of the parenthesis become a positive sign? Example #2: 2x + 5x 3(4 - 3) = -21; will the minus (negative) sign inside of the parenthesis not change because of the 3 outside of the parenthesis is a positive sign? Thank You, TSJ - AL Click here to see answer by longjonsilver(2297)
 Question 4821: When working equations with parenthesis, what is the rule for the "sign" in front of the parenthesis? Example #1: 2x + 5x -3(4 + 3) = -21; will the plus sign inside of the parenthesis become a minus (negative) sign and the negative sign in front of the 3 outside of the parenthesis become a positive sign? Example #2: 2x + 5x 3(4 - 3) = -21; will the minus (negative) sign inside of the parenthesis not change because of the 3 outside of the parenthesis is a positive sign? Thank You, TSJ - AL Click here to see answer by Abbey(339)

 Question 4858: What is the correct evaluation? -4t for t = -10 Click here to see answer by Abbey(339)

 Question 5775: simplify 35 divided by 5 plus 2 times 7 Click here to see answer by longjonsilver(2297)

 Question 6750: hi i am a 45 y/o and just starting back to school...we are working with linear equations and i would appreciate a little assistance in getting this "equation" simplified (1/4)(20-C)=3 i am thinking that 1/4 needs to be simplified to .25 but i am really stuck and feel like a boost is needed so i dont pick up any bad habits...thanx dave Click here to see answer by nidz(2)

 Question 6788: Dear Tutor, It would be really very nice of you to evaluate this question for me. Evaluate: 2a-{4[b-3(a-2xb-2a)]-10(3b-5a)] Thank you Click here to see answer by ichudov(499)

 Question 6842: Im having a problem with the system of equations....for example x+y=11 y=-3x Click here to see answer by prabhjyot(164)

 Question 6895: The temperature at 5:00am is -38F.the temperture rises 20 degree by 11:00am.What is the temperture at 11:00am. Click here to see answer by Mike(39)

 Question 6939: Please help me help my daughter with this equation: 12-(20-2(6^2/3*2^2) I have seen the solution but don't understand how you get there. How does one know to multiply the inner parenthesis by -2 rather than by 18, 20-2? In the solution, both the 6^2 and 2^2 are divided by 3, then multiplied, rather than 6^2 divided by 3 and then multiplied by 2^2. Why is this? In the solution the minus sign behind the 20 becomes a plus sign, why? Thank you. Click here to see answer by glabow(165)

 Question 6938: Could you please assist me in the following two questions and show all the work used to get to the answer. Evaluate: − │─3│ Write one subset of A={1,3,5,7,9,11}. Click here to see answer by glabow(165)

 Question 6984: Determine if the two give lines are parallel. 4x + 9y = -27 y = -4/9x -9 Click here to see answer by glabow(165)

 Question 7090: Problem: 4/2n > 8 (Note, the > has a line under it) Hi, I'm trying to help my child over the phone with math. She has the above problem. I don't have a book that explains the symbols and can't find one one the net. Could you help me with that? Also, could you explain the problem to me. I think it's 2 times n divided into 4 (something) 8 Thanks, Dan Click here to see answer by Earlsdon(6287)

 Question 7079: twenty-one minus the sum of fifteen and five How would i write this problem out in mumerical form Click here to see answer by Lilo(1)
 Question 7079: twenty-one minus the sum of fifteen and five How would i write this problem out in mumerical form Click here to see answer by glabow(165)
 Question 7079: twenty-one minus the sum of fifteen and five How would i write this problem out in mumerical form Click here to see answer by longjonsilver(2297)

 Question 7216: How do you do problems like this: -[a(-7)] Click here to see answer by elena21(2)

 Question 7400: How do you write a variable expression to represent the phrase: example A number added to 27 Click here to see answer by bonster(299)

 Question 7547: an algebra teacher stated that 2x+1=1 5=2x=14 are equivalent. what was done to the first equation to get the second equation? what is the value of x that makes both equations equal? Click here to see answer by Earlsdon(6287)