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

Tutors Answer Your Questions about expressions (FREE)

Question 215105: 5x-7(x-6). The answer in the back of the book says -2x+42 but I can't figure out how they arrived at that! Please help!!! I understand the concept of FOIL (First, Outside, Inside, Last) but for some reason I can't seem to get beyond 5x squared. 5x squared - 30x -7x +42, then what? Like terms? Or do I divide by "x"? EEEK!
Click here to see answer by checkley77(12844)

Question 215425: -2x(x-8)
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Question 215667: What is an algebraic expression?
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Question 215793: the expression 15-3[2+6(-3)]
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Question 215793: the expression 15-3[2+6(-3)]
Click here to see answer by stanbon(75887)

Question 215877: Okay so today in math my teacher taught us on evaluating expressions and like she wants us to show summ kind of work like:

6 to the power of 5 so you go
6*6*6*6*6
Awnswer is 7796
then she wants us to do negatives and i dont really get how to do those??
Could you help?? Please thanks tesha
Click here to see answer by checkley77(12844)

Question 215932: Solve.
23) a + b = s + r for s
Click here to see answer by rfer(16322)

Question 216002: -20=-4X-6X
Click here to see answer by drj(1380)

Question 216021: 2 negatives eguals a what
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Question 216227: 9=-5g-23
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Question 216316: 7+3/2+3
Click here to see answer by RayVelbis(4)

Question 216322: 6+30/9.7
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Question 216483: how to solve .67=(x-110)/25
Thanks
Click here to see answer by stanbon(75887)

Question 216751: Thank you so much for your assistancew. Here is my first algebra question:
What is a numerical or algebraix expression dore the word expression:
63b,for b = 15.
Click here to see answer by Alan3354(69443)

Question 216821: i am doing algebra, solving equations with variables on both sides
what is 3p-8 = 13-4p
Click here to see answer by Studenttt(8)

Question 215500: Add parentheses to make this statement true.
8-2+2=2
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Question 217073: Hi my name is Haley, and I am falling behind alot in Algebra 1 and i'm not sure what to do...it seems like everybody else around me gets it. I know i am smart but i feel really stupid. Can u please help?
Click here to see answer by Alan3354(69443)

Question 217307: Please help factor the expression
1) y^2-16
2) n^4-m^4
3) 12a^4b^3c^4-108a^2bc^6
4) p^3-q^3=(p-q)
Click here to see answer by jsmallt9(3758)

Question 217543: Please help me simplify this equation: 2x(2x-4)
Click here to see answer by Theo(13342)

Question 217543: Please help me simplify this equation: 2x(2x-4)
Click here to see answer by rfer(16322)

Question 217543: Please help me simplify this equation: 2x(2x-4)
Click here to see answer by drj(1380)

Question 217542: Please help me simplify this equation: 4(x-3)+7x
Click here to see answer by rfer(16322)

Question 217541: Please help me solve this equation: 2x(2x-4)
Click here to see answer by drj(1380)

Question 217773: 6t+2+3t+17=10

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Question 217773: 6t+2+3t+17=10

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Question 218120: rewrite the expression without double signs, then simplify.
-55+(-27)
Click here to see answer by drj(1380)

Question 218105: -0.9x-7.2+0.3x-12 When x= 5
Click here to see answer by rfer(16322)

Question 218438: Write an equivalent expression using exponential notation. 5√(n4)
I do not understand the check marks:(
Click here to see answer by stanbon(75887)

Question 218559: how do i simplify this equation 2(7 - t) + 14t - 11
Click here to see answer by checkley77(12844)

Question 219075: How Do Solve This Problem?
10(0.7-0.9)
Click here to see answer by user_dude2008(1862)

Question 219158: What is the answer to this problem?
7(a+1)+3=1/7(49a+70)

Click here to see answer by jim_thompson5910(35256)

Question 219158: What is the answer to this problem?
7(a+1)+3=1/7(49a+70)

Click here to see answer by kannan(2)

Question 219282: 7 more than x
Click here to see answer by user_dude2008(1862)

Question 219475: 0.9(5x+15)=2.4(x+3)
Click here to see answer by stanbon(75887)

Question 219684: 4d+9d-(7-6d)
Click here to see answer by rfer(16322)

Question 219684: 4d+9d-(7-6d)
Click here to see answer by user_dude2008(1862)

Question 220250: Which of the following expressions represents the product of 3 less than twice x and 2 more than the quantity 3 times x ?
A. �6x2 + 25x + 6
B. 6x2 + 5x + 6
C. 6x2 � 5x + 6
D. 6x2 � 5x � 6
E. 6x2 � 13x � 6
Click here to see answer by ptaylor(2198)

Question 220181: 4+2(4x-3(5-x))=2(x+59)
Click here to see answer by rfer(16322)

Question 220450: 4(-8)
Click here to see answer by rapaljer(4671)

Question 220400: Please evaluate the factorial expression (700!)/(699!)
Click here to see answer by checkley77(12844)

Question 220615: Please explain step by step how to symplify: (2t+4)3+6(-5t)-(-8)
The answer in my book is: -24t+20
I don't have a clue how to get there.
Click here to see answer by chibisan(131)

Question 220763: I used to know how to do these problems.
8(9-4)(4+5)x4=
But i forgot how to.
What are the steps?
And
Are these steps right?
8 Over 16 + 9 Over 16 Does it equal 8 over 17?

Click here to see answer by babydoll77stl(4)

Question 220793: evaluate xy as well as x/y if x=20 and y = -5
Click here to see answer by rfer(16322)

Question 220968: the product of nine and a number, decreased by seven.
Click here to see answer by checkley77(12844)

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