Questions on Algebra: Real numbers, Irrational numbers, etc answered by real tutors!

Tutors Answer Your Questions about real-numbers (FREE)

Question 131027: Hi! For this question it asks to simplify, the problem is: a^-3 b^2.
What I got for this was ab^1. Please help me Thank You=)
Click here to see answer by checkley71(8403)

Question 131029: This particular question asks to simplify. What I got for this was xy^1, I don't know where I went wrong, but the problem is: x^2y^3. Please and Thank you=)
Click here to see answer by MathLover1(20849)

Question 131486: Can I get help please! It asks to solve by whatever method seems easiest to you. Leave answers in simplest radical form. The problem is 3x^2=2x+5
Please help me Thank You=)
Click here to see answer by 067isa(13)

Question 131482: I need help! For this particular question it asks: Solve by whatever method seems easiest to you. Leave answers in simplest radical form. The problem is x^2+8x=-16
I tried solving this problem, by solving it two diffrent ways, so I got two answers:
31
- -
1616
Please help Thank You=)
Click here to see answer by benni1013(206)

Question 131946: could someone please help me with this problem?
(3-i) / (1+i) I know you use the conjugate and multiply by (3-i) / (1+I) I think,but I don't think I did something right.Thanks for your help in advance.
Sincerely,LH
Click here to see answer by ptaylor(2198)

Question 131945: could someone please help me with this problem?
(3-i) / (1+i) I know you use the conjugate and multiply by (3-i) / (1+I) I think,but I don't think I did something right.Thanks for your help in advance.
Sincerely,LH
Click here to see answer by solver91311(24713)

Question 131984: what is ur name

Click here to see answer by solver91311(24713)

Question 132130: I would really appreciate some help solving two problems.Thank you in advance for taking the time to help me.On these problems it says to write each answer in the form a + bi.
1) (6-i)(3+2i)
2)3i(6+4i)
Click here to see answer by josmiceli(19441)

Question 132372: I need help on a couple questions? These are multiple choice.
A basketball drops from a height of 76 in. On bounce 1 it rebounds to a height of 38 in. On bounce 2 it rebounds to a height of 19 in. How high does the basketball bounce on bounce 3?
a. 9 in. B. 19 in. C. 9.5 in. D 4.75 in.

Write a rule for the pattern: -3,-9,-14, -42,-47,-141.....?????
Please HELP!!!!!

Click here to see answer by oscargut(2103)

Question 132381:
Simply the following expression: Assume that a and b are positive real numbers and m and n are rational numbers
Click here to see answer by solver91311(24713)

Question 132402: I have 2 questions I can't figure out! These are multiple choice.
Which equation is not equivalent to the others?
A. 4x=12 B. 12=x C. 4x/4=12 D. x/4=12

Which expression has a value of 21
A. (5+4)*5+15/5
B. 5+(4*5+15)/5
C. 5+4*(5+15)/5
Click here to see answer by solver91311(24713)

Question 133054: For what values of k will the equation kx^2+(k-2)x+4k=0 have no real soloutions?
Click here to see answer by vleith(2983)

Question 133116: solve for x: 5(x-2)=2(10+x)
Click here to see answer by jim_thompson5910(35256)

Question 133681: What values of x may not be used in the expression ((x+5)/(x^2-4))?
I am completely clueless on this stuff it confuses me!
Thanks
Click here to see answer by scott8148(6628)

Question 133681: What values of x may not be used in the expression ((x+5)/(x^2-4))?
I am completely clueless on this stuff it confuses me!
Thanks
Click here to see answer by jim_thompson5910(35256)

Question 135491: INDICATE WHETHER THE EQUATION HAS NO SOLUTION OR IS TRUE FOR ALL REAL NUMBERS. IF NIETHER IS THE CASE, SOLVE FOR THE VARIABLE.
18x-3(3+6x)=-9
Click here to see answer by cbcrawford978(7)

Question 135490: INDICATE WHETHER THE EQUATION HAS NO SOLUTION OR IS TRUE FOR ALL REAL NUMBERS. IF NIETHER IS THE CASE, SOLVE FOR THE VARIABLE.
10x-2(4+5x)=8
Click here to see answer by cbcrawford978(7)

Question 136928: I am not sure what topic this is in so I can't find any examples. Please help.
This is on empty set and I know that an empty set is empty. I just can't remember if that is whole numbers or can it be decimals and fractions too? So the question is
True or False The set of numbers less than 0 but greater than 1 is the empty set.
I said true because in between 0 and 1 is empty if it is whole numbers. IS that right?
Click here to see answer by vleith(2983)

Question 137065: 7r/12=-14
1/3s+7/9=4/3s

Click here to see answer by stanbon(75887)

Question 138209: Can you please help me find all the real solutions to this problem
Click here to see answer by scott8148(6628)

Question 139311: Could I please have some help solving this problem. Thank you. x varies directly with y and inversely with z. x=0.25 when y=10 and z=20. find x when y=20 and z=10. Thank you...
Click here to see answer by stanbon(75887)

Question 139309: I have a problem that I could use some help understanding how to solve/answer from a homework sheet. x varies directly with y and inversely with z. x=20 when y=8 and z=4. Find x when y=4 and z=8. Thank you
Click here to see answer by vleith(2983)

Question 139386: Find two consecutive even integers whose product is 224.
Click here to see answer by scott8148(6628)

Question 140860: could you tell me which ones of these are integers? some of them have a square root sign and I don't know how to make that on the computer so I'll do my best.
-12, square root 7, -7/3, square root 8 with a little 3 at the top, 0, 9, 4 2/3, square root 25, -square root 14, square root 5 with a little 5 at the top,square root 4 with a little 3 at the top,5/7
If you could also tell me why they are integers,that would help me alot.Thank you in advance for your help,because I'm an older student and I have found it harder to go back to school in your late thirties,but I know it will be worth it.
Have a great day! Elle
Click here to see answer by solver91311(24713)

Question 141476: Please help me�.my daughter needs to solve the equation below and I have gotten very rusty with my Algebra�Thank you so much
�/� means divide
3(x+5)/6= x+1
Thank you again

Click here to see answer by jojo14344(1513)

Question 141433: 5.7d=3.2d-8
Click here to see answer by checkley77(12844)

Question 141578: what is
-2b^2+5b-4
times -3b+2
___________________
Click here to see answer by Fombitz(32388)

Question 142477: The longer leg of a right triangle is 6 cm longer than 6 times the shorter leg and also 1 cm shorter and the hypotenuse. Find the perimeter of the triangle.
Click here to see answer by scott8148(6628)

Question 142527: WHAT IS IRRATIONAL NUMBER
Click here to see answer by stanbon(75887)

Question 143153: The set of real numbersless than or equal to -4?
Which of the integers has an absolute value greater than 1?

Click here to see answer by vleith(2983)

Question 143221: 16x^2=81

Click here to see answer by scott8148(6628)

Question 143500: write each equation in standard form y=7x-5
Click here to see answer by vleith(2983)

Question 143499: write each equationin standard form y=7/12x+1
Click here to see answer by vleith(2983)

Question 143519: Definition: If y is a real number, then y to 1st power = _________________
Click here to see answer by nabla(475)

Question 143552: find the rational number halfway between 5/16 and 7/8

Click here to see answer by jim_thompson5910(35256)

Question 143565: What is the different between rational numbers and inrational numbers
Click here to see answer by stanbon(75887)

Question 143565: What is the different between rational numbers and inrational numbers
Click here to see answer by solver91311(24713)

Question 144031: Hi I'm having some trouble with this problem, we have to divide this algebraic expression. If you can provide me with some help I would appreciate it. Thanks.
(2x^3 - x^2 + 3x -1) � (x + 2)
Click here to see answer by stanbon(75887)

Question 144104: hii. i have something to ask. can you you define what is real numbers.? also with the properties of real numbers.,? thank you :)
Click here to see answer by nabla(475)

Question 144458: PROBLEM:
LET f(x)=3x^2-2x+1. FIND THE FOLLOWING:
f(2)
*** IN THIS MY TEACHER SAYS THE ANSWER IS 9... BUT IT SEEMS EVERYTIME I WORK IT OUT I COME UP WITH 7... PLEASE HELP AND EXPLAIN WHAT I AM DOING WRONG STEP BY STEP... THANKS :)
Click here to see answer by Alan3354(69443)

Question 144459: PROBLEM:
FIND THE EQUATION OF THE LINE THROUGH THE POINT (4,5) THAT IS PERPENDICULAR TO THE LINE 3x-4y=7. WRITE YOUR ANSWER IN STANDARD FORM AND GRAPH THE LINE.
*** IN THIS PROBLEM I TRIED FOLLOWING THE BOOK BUT, IT JUST CONFUSED ME EVEN MORE... PLEASE SHOW ME EVERY STEP I NEED TO FOLLOW TO GET THIS COMPLETE ANSWER... THANKS :)
Click here to see answer by t.kandeepan(2)

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