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

Tutors Answer Your Questions about expressions (FREE)

Question 87: how would you answer5(c-b)+10
a=5 b=3 c=9
Click here to see answer by mcateeDC(3)

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 2006: Evaluate 4p=q/p when p =-2 and q=-3
Click here to see answer by longjonsilver(2297)

Question 3556: Question - How do I go about solving this problem??
3(4-6)^2-2(4-3)
Click here to see answer by drglass(89)

Question 3556: Question - How do I go about solving this problem??
3(4-6)^2-2(4-3)
Click here to see answer by Pieter(35)

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 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 5800: Please help me solve this equation: { { { -2x^2 - 4x - 2 } } }.
Click here to see answer by arunpaul(104)

Question 6094: Please help me solve this equation:
4a - 2b[(4a + 3b)- 3c]- 5a
when a= 3
b= -2
c= -1
Click here to see answer by guapa(62)

Question 6132: x^2 + 2x - 15 = 0
Click here to see answer by Abbey(339)

Question 6638: Could you please help me solve this equation?
-3x - 12 = 2x + 8
Click here to see answer by ichudov(507)

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 6772: how do you solve:

Click here to see answer by ichudov(507)

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(507)

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(165)

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(6294)

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 7088: 4/2n >_8
Click here to see answer by longjonsilver(2297)

Question 7148: What is the square root of x^2+y^2
Click here to see answer by prince_abubu(198)

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(6294)

Question 7809: Could you please help me factor this problem? 1-125b^3
Click here to see answer by arunpaul(104)

Question 7812: Could you please help me with this problem? I am having trouble factoring:
8x^3y^6+27
Click here to see answer by pvrbrahmam(12)

Question 7808: Could you please help me factor this problem? 64x^3+1
Click here to see answer by pvrbrahmam(12)

Question 8249: I am trying to help my daughter with her work but I am not understanding could I please get help with this question
A fitness club requires a $100 initiation fee and dues of $25 each month. Write an expression for the cost of meembership for n months. then find the cost of membership for one year. I am not sure what I am suppose to do. Any help would be apprecaited.
Thank you
cindy
Click here to see answer by bonster(299)

Question 8264: I am trying to help my daughter with her homework but I need help with it here is my question I need to write an expression for the number of kilometers a dolphin travels in d hours swimming ag 8 km/h. Then find the number of kilometers the dolphin travels in 3 hours. Any help would be apprecated.
Thank you
cindy
Click here to see answer by Earlsdon(6294)

Question 8319: Please help me solve this problem.
36-8/2
(36-8)/2
Click here to see answer by bonster(299)

Question 8349: a negative plus a negative = a positive?
Click here to see answer by bonster(299)

Question 8257: write an expression for the value of a 3-digit whose hundreds, ten, and units digits are x,y,and z
Click here to see answer by Earlsdon(6294)

Question 8445: I need help please: Thanks.
Click here to see answer by bonster(299)

Question 8445: I need help please: Thanks.
Click here to see answer by drglass(89)

Question 8444: I think there's factoring in this one: . Help please?
Click here to see answer by bonster(299)

Question 8438: is the equation I am having trouble with. Could you help? Thank you very much.
Click here to see answer by bonster(299)

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