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

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Question 42383: Please help me with this problem (show your work)
( 7 x 10^3) x (8 x 10 ^-9)

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Question 42377: In which year did the greatest percent increase in filings occur?

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Question 42466:
(x+y)^2 + (x+3y)^2 - 10(x+3y) - 4(x+y) +29 = 0 , find the value from next expresion

2y^2 + xy

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Question 42465: 2 2
(x+y) + (x+3y) - 10(x+3y) - 4(x+y) +29 = 0 , find the value from next expresion
2
2y + xy
This problem is not from textbook.

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Question 42518: Solve for x. 3x – 2y = 6
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Question 42514: Solve x over 6 + 3 = 0
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Question 42514: Solve x over 6 + 3 = 0
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Question 42636:
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Question 42729: How do I evaluate the following expression?
-5-10/2*-11
I did the following
10/2=5*-11=-55
-55-5=-60
Where did I go wrong?

Click here to see answer by Nate(3500) About Me 

Question 42728: I am trying to figure out how to evaluate the following expression:
2-(12/(-2+(2*2))I worked the problem by:
-2+4(parenthesis)
12/2=6
-2-6=8
Where aam I going wrong?




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Question 42989: 6*5+2-24 divded by 4*2
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Question 43136: how to solve for, t
5t, for t = 3

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Question 43382: Solve for R:
1/R = 1/A + 1/B
I thought I had this worked out, but was not sure I could do what I did. I multipled both sides of the equation by 1/1 which allowed me to end up with R = A + B. Can this be correct? What did I do wrong?
John

Click here to see answer by psbhowmick(878) About Me 

Question 43529: Can someone double check my answer please?
Evaluate the following expression and round to the nearest tenth.
x = 9.69
y = -8.02
My options are: A)-30.41 B)49.8 C)20.58 D)17.71

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Question 43654: Evaluate |-30|x|1/5-1/3|. Thank you for your help!
Click here to see answer by tutorcecilia(2152) About Me 

Question 44077: Simplify:
10^6+8(10)^3+5(10)^2+7

Click here to see answer by adamchapman(301) About Me 

Question 44098: I need some help on this problem:

I need to evaluate: |111|
(I think it means a total of one-hundred eleven not 3 ones) what do you think?
Thanks

Click here to see answer by adamchapman(301) About Me 

Question 44342: derrik and samantha are sellin tickets for their school musical. floor seats cost $7.50 and balcony seats cost $5. samantha sells 60 floor tickets and 70 balcony seats, derrik sell 50 floor seats and 90 balcony seats. evaluate the expression to determine how much they collected.

thank you

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Question 44344: 4m-m-m
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Question 44344: 4m-m-m
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Question 44612: I need some help on this problem. I have gotten two different responses and I am not sure which is correct.
I need to WRITE 30,672 in expanded form.
Thanks,
Sher

Click here to see answer by stanbon(75887) About Me 

Question 44889: i just don't understand the problems that i am suppose to do and i think is very hard for me,so can you please help me?
Click here to see answer by atif.muhammad(135) About Me 

Question 45166: help.. I got this wrong,and im totally lost..
state each of the following systems by using either addition or substitution.If a unique solution does not exist,state whether the system is dependent or inconsistent.




10x+ 2y =7
y= -5x+ 3

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Question 45385: Subtract (9z-5/8) from (z+7/8)
I got z-3/16 Is this correct? Thanks!

Click here to see answer by rapaljer(4671) About Me 

Question 45395: 4(5x+1)+7(x-5)
Click here to see answer by Nate(3500) About Me 

Question 45679: Can someone help me with this problem?
I need to find the GCF (greatest common factor) for each groups of numbers:
36, 54, and 180
Thanks,
Sher

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Question 45859: Can someone help me on this?
I need to evaluate:
|4| + |-3|
Thanks, Lyn

Click here to see answer by Nate(3500) About Me 

Question 45860: Can someone help me here?
I need to represent each quantity with a real number:
A country exported $60,000,000 less than it imported, creating a negative trade balance.
Thanks, Lyn

Click here to see answer by AnlytcPhil(1807) About Me 

Question 45827: please help! Question: Determine the standard of the equation of the line that contains (3,-5) and (9,2)?
Click here to see answer by checkley71(8403) About Me 

Question 46261: Hello, is *c* the correct answer here?
Which expression represents an example of the distributive property?
(a) 2(x + 3) = 2x + 5
(b) 2(x + 3) = 2x + 6
(c) 2(x + 3) = 2x + 23
(d) 2(x + 3) = 2x + 3
If I got it wrong can you tell me which is right and why? Thank you!

Click here to see answer by Earlsdon(6294) About Me 

Question 46534: This is the exact question:
Express the product of a number increased by 15, and the number -8
This is what I did:
2.2.2.2.2.2.2 . 2.2.2.2.2.2.2.2=
2^7 . 2^8 = 2^7+8 = 2^15
AND
5^-4 . 5^4 = 5^-8
Is that right, and does the question sound like they want me to actually work the problem I created?
Thank you!

Click here to see answer by Earlsdon(6294) About Me 

Question 46589: Can someone help me on this?
The kinetic energy of a particle of mass m is found by taking one-half of the product of the mass (m) and the square of the velocity (v). Write an expression for the kinetic energy of a particle.
Thanks,
Sher

Click here to see answer by Nate(3500) About Me 

Question 46588: Could someone help me on this?
It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year?
Thanks,
Sher

Click here to see answer by Nate(3500) About Me 

Question 46587: Can someone help me on this?
I need to write the following phrases, using symbols:
The quotient when 3 more than a number is divided by 3 less than that same number.
Thanks,
Sher

Click here to see answer by josmiceli(19441) About Me 

Question 46586: Can someone help me on this?
I need to write the following phrases, using symbols:
The sum of m and n, divided by the difference of m and n
Thanks,
Sher

Click here to see answer by Nate(3500) About Me 

Question 46637: Can someone help me on this?
Suppose that the temperature outside is dropping at a constant rate. At noon, the temperature is 70 degrees F and it drops to 58 degrees F at 5:00 P.M. How much did the temperature change each hour?
Thanks,
Lyn

Click here to see answer by checkley71(8403) About Me 

Question 46816: Can someone help me on this problem?
A triangle has sides 3x + 7, 4x - 9, and 5x + 6. Find the expression that represents its perimeter.
Thanks,
Sher

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Question 46812: Can someone help me on this problem?
At 7 A.M., the temperature was -15 degrees F. By 1 P.M., the temperature had increased by 18 degrees F. What was the temperature at 1 P.M.?
Thanks,
Sher

Click here to see answer by stanbon(75887) About Me 

Question 46810: Can someone out there help me with this problem. I have put this problem through twice and havn't gotten a response.
I need to insert grouping symbols in the proper place so that the given value of the expression is obtained.

5 - 3 . 2 + 8 . 5 - 2; 28
Thanks,
Sher

Click here to see answer by stanbon(75887) About Me 

Question 46807: I need some help on this problem. I have put this problem through 2 times before but havn't gotten a response.
I need to evaluate the following expression:
[(2 + 3)^2 - 4 . 5] + 7
Thanks,
Sher

Click here to see answer by adamchapman(301) About Me 

Question 47016: 3ab^2+5a^2b-1 when a=2 and b=-2
Click here to see answer by venugopalramana(3286) About Me 

Question 47104: -3 - (-4x)= -4x + 5
Click here to see answer by tutorcecilia(2152) About Me 

Question 47108: Perform the indicated operation and expression lowest terms.
%2815%29%2F%28q-5%29-%284%29%2F%28q-5%29

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Question 47224: Can someone help me on this problem?
I need to evaluate the expressions if a = -2, b=5, c= -4, and d=6
b^2 - 3bc + c^2
Thanks,
Lyn

Click here to see answer by checkley71(8403) About Me 

Question 47393: I need some help please
5-1(2X+3)=-2(4+X))

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