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

Tutors Answer Your Questions about expressions (FREE)

Question 620385: the formula for a^2 + b^2 + c^2 ie what is the formula to calculate the sum of squares of three terms
Click here to see answer by Alan3354(69443)

Question 621142: -7x^3-4x2-8x+1 when X=-4
I cannot solve the problem can you please help me my name is veronica
Click here to see answer by ewatrrr(24785)

Question 621305: 11 - 8 � (1/3 + 1/5) I need to show work on this. But I think the answer is -4
Click here to see answer by AnlytcPhil(1807)

Question 621691: Evaluate . c � (c^2) � 7, for c = -6
Click here to see answer by lynnlo(4176)

Question 621691: Evaluate . c � (c^2) � 7, for c = -6
Click here to see answer by tutor_paul(519)

Question 621710: please help and explain? 7*?≡ 8(mod9)
Click here to see answer by dfrazzetto(283)

Question 621712: If monday is your starting month, what month will it be 2yrs, 21 days from monday. please explain.
Click here to see answer by lynnlo(4176)

Question 621713: If february is your startung month, what month will it be 77days from february?
Click here to see answer by lynnlo(4176)

Question 621725: what does this equal if i simplify?
(-9x)(7p) + (-3x)(-5p)
Click here to see answer by lynnlo(4176)

Question 621884: Perform and simplify

After working this out I am coming up with:
(x+2)(x-2)(2x)(x-3)/(x)(x+2)(x-3)(x-2)
After cancelling I am coming up with 2x/x which would be 2 correct?
Click here to see answer by Maths68(1474)

Question 622604: Hello, I am taking a pre-algebra course and I'm having a real hard time. I need some help this question.
3x-9-5x+2
Click here to see answer by rfer(16322)

Question 622609: Hey :) Me again. Just wondering if someone could walk me through these problems.
-4x+7-3y-7y-5
-2-x=2y-4y+5x
6-(3x-7)
3(2x-4-2(x-4)
Thanks!
Click here to see answer by lynnlo(4176)

Question 622657: Evaluate -2-(-6+(-3))
Click here to see answer by lenny460(1073)

Question 622740: a peice of fabric in cut into 12 equal lenghs with 3 inches left over what is the equation ?
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Question 621977: what is the answer of 4x-4ay
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Question 622325: 3x4+1
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Question 625082: Raise the quanitity in parentheses to the indicated exponent,and simplify the resulting expression. Expression. Express answers with positive exponents.
( 45x^0y2)-1
(_________
(180x^-4y^-4)
Thank you very much in advance. Now this one has me confused big time. It is suppose to be a "Short Answer!" Whatever that means....
Click here to see answer by Alan3354(69443)

Question 625746: 6(2x+1)-3(4x-3)-(6x+10)=-(4x-3)+3
Click here to see answer by jim_thompson5910(35256)

Question 625717: Evaluate: 3^-1-6^-1
Click here to see answer by Alan3354(69443)

Question 625717: Evaluate: 3^-1-6^-1
Click here to see answer by sanadei(3)

Question 625764: Raise the quantity in parentheses to the indicated exponent, and simplify the resulting expression. Express answers with positive exponents.
( -37x^-1y^-2 / 74y^3) ^-2
Click here to see answer by mananth(16946)

Question 625828: if f(x0 = x+8, evaluate each
a.)f(4)
b.)f(-2)
c.)f(-x)
d.)f(x=3)
Click here to see answer by oscargut(2103)

Question 625902: how do you translate the product of 5 and t?
Click here to see answer by jim_thompson5910(35256)

Question 625903: how do you translate the sum of a and b, divided by 7?
Click here to see answer by jim_thompson5910(35256)

Question 625905: how do you translate the product of 2 more than a number and 2 less than that same number?
Click here to see answer by Edwin McCravy(20060)

Question 625906: the simple interest earned when a principal p is invested at a rate r for a time t is calculated by multiplying the principal by the rate by the time write an expression for the interest earned. how do you translate that?
Click here to see answer by Theo(13342)

Question 626642: f(x)=3x-4 and p(x)= 1/x -2
find (f+p)(2)
Click here to see answer by ewatrrr(24785)

Question 626658: g(x)=(x+1)� f(x)= 3x-4
find 2g(2) -7f(0)
Click here to see answer by stanbon(75887)

Question 626674: if
1+2=11
4+5=209
3+4=103
4+2=80
1+3=??
reply me soon please.
Click here to see answer by ewatrrr(24785)

Question 626757: which expression is equivalent to 2(b-c)+12c-8b

Click here to see answer by jim_thompson5910(35256)

Question 627149: Solve for u
1/2u-2/3=-4/7
Click here to see answer by jim_thompson5910(35256)

Question 627162: Solve for u
3u^2+10u=-3

Click here to see answer by jim_thompson5910(35256)

Question 627564: how do i find the exterior angle of a convex polygon?
Click here to see answer by MathLover1(20850)

Question 627615: x+4/x-3=10/3-x
Click here to see answer by Maths68(1474)

Question 627699: Please help me expand and simplify this: (2x+3)^2+3(x+1)^2.
I tried expanding it- but failed to do so. I'm not sure of how to solve this problem but know that the answer is: 7x^2+18x+12. When I tried solving it, I got: 5x^2+9x+12. Here are my steps:
Expand and Simplify: (2x+3)^2+3(x+1)^2
1. 2x^2+6x+9+3[x^2+x+1]
For step 1, I multiplied 2x by the power of 2 which i got: 2x^2, then three times 2 which i got 6x and then i multiplied 3 times 3, which i got 9.
2. 2x^2+6x+9+3x^2+3x+3
I then multiplied 3 times x^2 which i got 3x^2, then i multiplied 3 times x, which i got 3x and then i multiplied 3 times 1 which is three.
Lastly, I gathered the like terms and did steps according to the negative and positive terms and as an answer, I got: 5x^2+9x+12.
Click here to see answer by ewatrrr(24785)

Question 627926: Write the slope-intercept equation for the line with slope 4/5 and y-intercept (0, -1) and graph the line. Submit your graph to the Dropbox. Please show all of your work.
Click here to see answer by solver91311(24713)

Question 627924: Solve 12-8(3x-5)>-7x+29 . Write your solution using set builder notation. Please show all of your work!!
Click here to see answer by ewatrrr(24785)

Question 627922: Solve -9y-12(2-3y)=-25-2(y+6) Please show your work so I'll understand!
Click here to see answer by jim_thompson5910(35256)

Question 627870: I need the answer to: (7/8) x (7/8)
Click here to see answer by jim_thompson5910(35256)

Question 627945: 6a2b2-2ab2c
Click here to see answer by jim_thompson5910(35256)

Question 623321: Choose any number x, write it down, and then use it to evaluate the expression
fraction 6x+15 over 3, minus 5, all over 2

Click here to see answer by CAD17(1)

Question 627981: Find the slope and y-intercept of the line in the given equation.
y=-8/11x-5
Click here to see answer by jim_thompson5910(35256)

Question 628035: g(x)=x^2+3x+3 evauluate g(-1)

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Question 628036: f(x)=2x-3 and g(x)=x^2+2x+4 evaluate f(1)-g(2)
Click here to see answer by ewatrrr(24785)

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