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

Tutors Answer Your Questions about real-numbers (FREE)

Question 281257: Please answer this question for me
if x is any real number, is x squared equal to x
Click here to see answer by rfer(16322)

Question 281257: Please answer this question for me
if x is any real number, is x squared equal to x
Click here to see answer by richwmiller(17219)

Question 281374: My question is :Is the product of two irrational numbers always an irrational number? Justify your answer.
Click here to see answer by richwmiller(17219)

Question 281438: find a quadriatic equation with the roots (4+i) and(4-i). i think the answer is 16-i is this correct.
Click here to see answer by edjones(8007)

Question 281537: 7 (5x+8)=12-(x+4) The solution is x= Type integer or fraction
Click here to see answer by Mathematicians(84)

Question 278730: Prove that no number of type 4k+1 be a perfect square.
Click here to see answer by richwmiller(17219)

Question 281551: Write an equation and solve:
Seven multiplied by a number is 35
The equaiton is:
Let y represent the unknown number. Do not solve

Click here to see answer by Mathematicians(84)

Question 281546: Convert to Farenheit
Use the formula:
F = 9/5 (fraction).C + 32
96 degrees C = _____ degrees F

Click here to see answer by checkley77(12844)

Question 281543: s = 5k + 5u
Solve for K
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Question 281538: -6x + 8x - 9 =
Click here to see answer by checkley77(12844)

Question 281906: TELL WHICH SET OR SETS THE FOLLOWING NUMBER BELONGS TO: NATURAL NUMBERS, WHOLE NUMBERS, INTEGERS, RATIONAL NUMBERS, IRRATIONAL NUMBERS AND REAL NUMBERS.
-1/3
Click here to see answer by stanbon(75887)

Question 281872: prove that square root of 3 is irrational

Click here to see answer by nabla(475)

Question 283269: I need help with this problem please. 4 - (-3) +1 divided by 2 -2� (-2). I came up with the answer of 4. Is this correct? Please advise. Thank you.
Click here to see answer by rfer(16322)

Question 283275: I need help please in evaluating this problem. ∣-9 ∣ - ∣-4 ∣. The answer I have is 5. Please advise. Thank you.
Click here to see answer by jim_thompson5910(35256)

Question 283276: I need to add thhis problem. 7 + (-9) + (-5) +6. My answer was -1. Is this correct? Please advise. Thank you.
Click here to see answer by jim_thompson5910(35256)

Question 283277: Could you please help me with this problem, I need to add 1/3 + (-5/6) + (-1/2). Please help me with this. Thank you.
Click here to see answer by rfer(16322)

Question 283278: I need to evaluate this problem. ∣-27 + 14 ∣. My answer was 13. Is this correct? Please advise. Thank you.
Click here to see answer by kela1616(2)

Question 283278: I need to evaluate this problem. ∣-27 + 14 ∣. My answer was 13. Is this correct? Please advise. Thank you.
Click here to see answer by Alan3354(69443)

Question 283554: Could you please advise if I have done this problem correctly? 16 divided by (-2).(-4) / 2 to the third power +4. My formula is 16 divided by (-2)(-4) = 16 divided by -2= -8 x-4=32/ 8+4=12 32/12 =8/3. It can be left as is or broken down to 2 2/3. Is this correct? Please advsie. Thank you.
Click here to see answer by checkley77(12844)

Question 283555: I need to find the five-number summary of 26,30,38,67,59,21,17,85,22,22. After placing them in order of 17,21,22,22,26,30,38,59,67,85, I found the Min= 17, Q1 = 22, Median Q2= 30, Q3= 59, and Max =85. Is this correct? Please advise. Thank you.
Click here to see answer by Edwin McCravy(20054)

Question 283879: When you multiply a certain number by 3 and then subtract 7/18, you get the same result as when you multiply the numberby 2 and add 5/12. What is the number?
Click here to see answer by solver91311(24713)

Question 284004: can i have the name of your best tutor please??????!!!!
Click here to see answer by solver91311(24713)

Question 284004: can i have the name of your best tutor please??????!!!!
Click here to see answer by richwmiller(17219)

Question 284075: How do I go from knowing the rational roots (2, -3, -6) to the equation

Click here to see answer by richwmiller(17219)

Question 284769: Max and Joey both drove 100 miles from Monticello to Little Rock. Max drove 10 mph faster than Joey and got to Little Rock 20 minutes earlier. How fast did each drive?
Click here to see answer by stanbon(75887)

Question 285024: x (to4th) - 50x(to 2nd) + 49 = 0 solve the equation
Click here to see answer by mananth(16946)

Question 285025: w is proportional to z. If w=-6 when z=2, find w when z=-3
Click here to see answer by hollytree(4)

Question 285023: add complex numbers (4=3i) + (-5+7i) give answer in complex form a+bi
Click here to see answer by richwmiller(17219)

Question 285022: graph the circle x^ + y^ -4x + 8y = 24
Click here to see answer by richwmiller(17219)

Question 285317: A student has earned scores of 87, 81, and 88 on the first 3 of 4 tests. If the student wants an average (arithmetic mean) of exactly 87, what score must she earn on the fourth test?
A. 85
B. 86
C. 87
D. 92
E. 93

Click here to see answer by checkley77(12844)

Question 285316: A student has earned scores of 87, 81, and 88 on the first 3 of 4 tests. If the student wants an average (arithmetic mean) of exactly 87, what score must she earn on the fourth test?
A. 85
B. 86
C. 87
D. 92
E. 93

Click here to see answer by checkley77(12844)

Question 285543: Is __________ an irrational or rational number?
0.285714
Click here to see answer by checkley77(12844)

Question 285883: Is the number 4.9 a rational or irrational?
Click here to see answer by user_dude2008(1862)

Question 285883: Is the number 4.9 a rational or irrational?
Click here to see answer by richwmiller(17219)

Question 286032: prove that no number of the type 4k+2 be a perfect square.
Click here to see answer by nabla(475)

Question 286319: Express irrational in simplest radical form.
(s-7)^=28
2(x-5)^=18
corrected problem
oops (s-7)^2=28
2(x-5)^2=18
Thanks for any help!
Click here to see answer by richwmiller(17219)

Question 286327: Solve 2(x-5)^2=18
Click here to see answer by edjones(8007)

Question 286756: Hello,
I can't seem to make sense of the simple definition of a rational number. I'm looking at my instructor's notes, and I've Googled it as well, but the definition seems contradictory to me. The definition I'm looking at says:
"numbers that "come to an end" or numbers that repeat and have a pattern. Examples of rational numbers are:
5.34, 0.131313..., 6/7, 2/3, 9"
I don't understand how it can be both. Which is it? Is it numbers that come to an end or is it numbers that DON'T come to an end? My understanding if IRrational numbers is that they do NOT come to an end, such as 33333....., so what is the difference?
Can anyone think of a different way to explain this? I'm sure it must be quite simple but it's just not clicking for me.
Thank you!
T

Click here to see answer by jim_thompson5910(35256)

Question 286903: 1/3+(-5/6)+(-1/2)=
I do not understand how to work this problem.

Click here to see answer by jim_thompson5910(35256)

Question 287184: Please help me summarize real - rational and real - irrational numbers for my 7th grader. I know Irr. #'s cannot be expressed as fractions, the decimal never ends and does not have a repeating pattern, and is not a perfect square. But what about negative numbers? rational right? unless it's like -23.7 or such?
Thanks for helping.
math Mom
Click here to see answer by jim_thompson5910(35256)

Question 287216: If two real numbers x and y are such that xy, x/y and x + y are all equal,
then x - y =
A. -3/2 B. 3/2 C. 1/2 D. -1/2 E. None of these.
Click here to see answer by richwmiller(17219)

Question 287441: Is zero a rational number or an irrational number or neither?
Click here to see answer by richwmiller(17219)

Question 288331: Simplify 5[61-(9-99)]=
Click here to see answer by richwmiller(17219)

Question 288613: If remainder of (5m+1)(5m+3)(5m+4)/5 is a natural number then find the remainder.
Click here to see answer by richwmiller(17219)

Question 288613: If remainder of (5m+1)(5m+3)(5m+4)/5 is a natural number then find the remainder.
Click here to see answer by Edwin McCravy(20054)

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