Questions on Algebra: Operations with Signed Numbers answered by real tutors!

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Question 886566: A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/hr more than the original speed. Total time taken to complete the journey is 3 hours. What is the original average speed of the train ?
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Question 777183: whats the solution for x^3y^2+3xy-54x
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Question 790418: How to find domain and range of a quadriceps equation g(x) = 3x2+2x+1
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Question 891092: why the answer of -97-85 comes out to be +74 when it should be -182 in 2s complement subtraction?
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Question 893476: on my summer math asigniment im stuk on this i dont get how to awnser it i clicked explain and still dont get it heres the problem
Evaluate the following expression.
[27 + 2 times (19-15)] divided by 5
plesee awnser some one

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Question 893520: How can I use four threes to get to the answers of 5,7,11,13,14 byt useing order of operations
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Question 894203: 4/5b=16
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Question 894741: what is 100 divided by 5^2 times 4^3
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Question 894741: what is 100 divided by 5^2 times 4^3
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Question 894942: convert the following in base ten to decimal
(a.)(3 7/8)
(b.) 321n = 232seven find n

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Question 895578: -20/5
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Question 898077: 1. Under what conditions will the expression a+b be negative?
2. Under what conditions will the expression a√b be negative?
3. Under what conditions will the expression a÷b be positive?
4. Under what conditions will the expression ab3 be negative?

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Question 898384: -8-4squared/2cubed-2
In the first part -8-4 squared, (I do not know how to put the little 2 next to the 4.) The / is the dividing sign, so therefore it is actually written as a fraction in my book. the divisor, the second part, is 2 Cubed - 2. (Again, I do not know how to write the little 3 next to the 2.) This is what I tried.
For the dividend: -8-4squared, I got: -8-16= -8+(-16)= -24
for the divisor: 2cubed-2, I got:8-2= 8+(-2)=6 therefore my new fraction is -24/6 which equals -4
thank you for your help

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Question 898384: -8-4squared/2cubed-2
In the first part -8-4 squared, (I do not know how to put the little 2 next to the 4.) The / is the dividing sign, so therefore it is actually written as a fraction in my book. the divisor, the second part, is 2 Cubed - 2. (Again, I do not know how to write the little 3 next to the 2.) This is what I tried.
For the dividend: -8-4squared, I got: -8-16= -8+(-16)= -24
for the divisor: 2cubed-2, I got:8-2= 8+(-2)=6 therefore my new fraction is -24/6 which equals -4
thank you for your help

Click here to see answer by richwmiller(17219) About Me 
Question 898384: -8-4squared/2cubed-2
In the first part -8-4 squared, (I do not know how to put the little 2 next to the 4.) The / is the dividing sign, so therefore it is actually written as a fraction in my book. the divisor, the second part, is 2 Cubed - 2. (Again, I do not know how to write the little 3 next to the 2.) This is what I tried.
For the dividend: -8-4squared, I got: -8-16= -8+(-16)= -24
for the divisor: 2cubed-2, I got:8-2= 8+(-2)=6 therefore my new fraction is -24/6 which equals -4
thank you for your help

Click here to see answer by MathTherapy(10551) About Me 

Question 900256: I need help with this problem: {15-3[44 divided by (3+8)]}+1 divided by 2.
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Question 902069: 3(3)-4(2)
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Question 902812: Subtract -5 from 19.
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Question 903260: 16x-15-9x=3
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Question 903272: -31=8-6p-7p
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Question 903837: What is the steps to answering (10-6) there's an exponent of three. Then times four, another exponent of two. Then (10+2) with another exponent of two.
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Question 904511: hi,
Which of the following is a factor of
8x^2 + 6xy - 9y^2
a) x -3y
b) 2x - 3y
c) 4x - 3y
d) 8x - 3y

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Question 904513: Hi,
solve for x
5x - 3 - 2x
____________ = 24
7
I have (33/7)x = 27, x = 27(7/33) = 63/11 or 5 8/11
But i need one of these answers:
a)53 b)54 c)56 d)57

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Question 904506: Hello,
a while back, I had submitted this problem:
simplify (5^2 3^2 7^1)^2
_______________
5^4
It was answered, but does not match any of the choices below:
a) 63 b) 3,969 c) 3,556,224 d) 4,064,256
_________ _________
625 625

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Question 904661: 150% of what number is 34?
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Question 904661: 150% of what number is 34?
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Question 905045: round to the nearest thousand 7,475,630
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Question 905046: on Monday Vickie spent 81 dollars for groceries and 25 dollars for gas and eight dollars for a movie whats the toatal amount she speant pick the answer to the ccloset number is it 80 are 90 or 100 or 112
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Question 905809: What is the orders of operation for 6^3-14/2 ?
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Question 905889: could someone please help me with the following question.
A formula is given as V=2u+3t². Change the subject of the formula to t.

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Question 906231: Simplify 18-2[10/3(11)-40]
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Question 907985: How do i solve- w divid by 5+3=6
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Question 916164: What number is 2000 more than 2 million?
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Question 917315: I'm new to algebra and im enrolled to soon start college and will need algebra. I never had it like i need it now. Can a tutor teach me from the very beginning? I have no idea where or how to start. Please help!
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Question 917321: I am a beginner with algebra, never had it before. I need to learn from the beginning. I'm new to this site and received this web from my advisor. Please inform me on how to get started as far as asking questions in the correct place if this is not the right place and an email on an available tutor who would be able to help me. Thank you.
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Question 917834: find the number of elements in the event space of rolling a sum of 12
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Question 920505:
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Question 925959: Graph f(x) = -3 + 1. Then reflect the graph of f(x) across the y-axis. Write a function. g(x) to describe the new graph. (you don't have to graph it, I don't understand what to graph)
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Question 925959: Graph f(x) = -3 + 1. Then reflect the graph of f(x) across the y-axis. Write a function. g(x) to describe the new graph. (you don't have to graph it, I don't understand what to graph)
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Question 926054: what is the greatest natural number of two dight and three dight
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Question 927062: My equation is -20/5-(-3)^2 The answer I got using the order of operation is 5 but the algebra calculator says -13. This answer requires me to divide before doing exponent. Why would I not use order of operation?
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Question 931823: solve algebraically
4x^2+y^2=64
x^2+y^2=52

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Question 933782: -15 + 3 x -4 - 12 /-6
Do I go left to right, or do I do the multiplication first?

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Question 934020: Algebra Find the unknown digit to make each statement ture
2.48 > 2.4n1 > 2.463 What goes in digit n and how do we determine this?
5.723 < 5.72n < 5.725
7.64 < 7.n5 < 7.68

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Question 937190: Pls help me out in solving with an explanation:if+543-255=244+are+all+in+base+n+find+the+number+base+n
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