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

Tutors Answer Your Questions about real-numbers (FREE)

Question 486650: Please help mei out with this problem. Thanks.
Simplify please show any work
(-5)^2
Click here to see answer by jim_thompson5910(28715)

Question 486648: Please help me with this algebra problem. Thanks so much. Please show any work.
Please State the reciprocal
-35/12

Click here to see answer by chessace(471)

Question 486644: Please help me with this algebra problem Thank you.
Divide and please show all work.
28/-2
Click here to see answer by solver91311(17077)

Question 487462: explain why every set is a subset of itself.
Click here to see answer by Edwin McCravy(8999)

Question 487484: what two integers (a/b) can be reduced to 21.3?
Click here to see answer by Edwin McCravy(8999)

Question 487382: It says : Name the set(s) of numbers to which each number belongs. Solve 1.93
Click here to see answer by richard1234(5390)

Question 487866: I need help with subsets numbers.
Click here to see answer by John10(267)

Question 487865: i dont under stand this problem
7-9
Click here to see answer by stanbon(57967)

Question 487918: Compare the numbers in each exercise using an inequality symbol.
4/5, 1.3
Click here to see answer by chessace(471)

Question 488425: i need to find out if -5 1/2 , 6, 2/3, 0, 3+5i are rational irrational or imaginary
Click here to see answer by stanbon(57967)

Question 488430: x/5 + 9 = 11
x/5 + 9 - 9 = 11 - 9
x/5 = 2
5(x/5) = 5(2)
x= 10
Click here to see answer by stanbon(57967)

Question 488430: x/5 + 9 = 11
x/5 + 9 - 9 = 11 - 9
x/5 = 2
5(x/5) = 5(2)
x= 10
Click here to see answer by John10(267)

Question 488446: Name the subset(s) of the real numbers to which each number belongs.
number: 12/18
Click here to see answer by stanbon(57967)

Question 489092: WHat is 2 pie r
Click here to see answer by nerdybill(7008)

Question 489617: Name the set(s) of numbers to which each number belongs.

1/3

7
-20/4
-7.34
Square Root of 5.
Click here to see answer by MathLover1(6812)

Question 489731: what is the greatest common divisor of 104 and 105
Click here to see answer by chessace(471)

Question 489847: 1/3(1 x 3) + (-3 + 3)
ans: 1/3(3)+0
3/3
1

Click here to see answer by Rajen(2)

Question 490071: What are all the real irrational numbers? im doing a project based on real numbers for math. Thanks
Click here to see answer by stanbon(57967)

Question 490240: Determine the nature of the solutions of the equation
y^2=3/4y+3/2
Fractions mess me up when I am figuring out equations.
Click here to see answer by John10(267)

Question 489845: What are natural whole integer rational irrational numbers? i left my notebook at school help! thanks
like natural is over 1 , whole is anything over 0 but i forget the rest...
Click here to see answer by richard1234(5390)

Question 490578: I don't understand!
Justify the equation by stating one of the properties of real numbers.
x*1=x
Click here to see answer by Edwin McCravy(8999)

Question 490616: what is a real number in algebra 2?

Click here to see answer by richard1234(5390)

Question 491120: Which of the following phrases does not describe the number -¾? (Points : 1)
rational number
irrational number
real number
negative number

Click here to see answer by stanbon(57967)

Question 491159: I don't get this question at all please help me!

How do you know that x^2 +9 is non-factorable over the set of real numbers?

Thank you so much.
Click here to see answer by jim_thompson5910(28715)

Question 491246: 12+(-7)

Click here to see answer by rfer(12730)

Question 491528: The smallest of three consecutive even integers is 8 less than :3 times the largest. Find the integers tljohnson510@yahoo. Com
Click here to see answer by stanbon(57967)

Question 491779: v*p=v but v doesn't =0
8*z=p
v+5=t
t+p=p
what is the numerical value of p,t,v, and z?
Click here to see answer by Alan3354(31528)

Question 492245: Hi I have a word problem and I don't quite understand it. Could you please help figure out how to slove it? Here is the question/problem: A dolphin starts at the surface of the water. It dives down at the rate of 3 feet per second. If the water level is zero, what real number descrides the dolphin's location after 3 1/2seconds?
Thank-you
Click here to see answer by chessace(471)

Question 492167: The area of the circle A found by using the formula pie(3.14) radius square.
Click here to see answer by richard1234(5390)

Question 492436: Is 3.45 a real number, rational, irrational
Click here to see answer by rfer(12730)

Question 492990: when you have part of an equation -3a, will 'a' be positive, negative or either?
Click here to see answer by Alan3354(31528)

Question 493104: a=-3
Click here to see answer by Alan3354(31528)

Question 493077: Is it free
Click here to see answer by Alan3354(31528)

Question 493942: if you have a negative numer and a positve number, is the result going to end up as a negative or a positve number? ex. -5x7, would it equal -35 or 35?
Click here to see answer by richard1234(5390)

Question 494021: PLEASE HELP WITH THIS WORD PROBLEM.....THE SECOND ANGLE OF A TRIANLGE IS 30 DEGREES LESS THAN THE FIRST ANGLR. THE THIRD ANGLE IS TWICE THE SECOND ANGLE. HOW LARGE ARE THE ANGLES?
Click here to see answer by stanbon(57967)

Question 494140: simplify -1 1/5 + (-7.8)
Click here to see answer by rfer(12730)

Question 494026: PLEASE HELP...IF YOU DOUBLE A NUMBER AND THEN ADD 12, YOU GET ONE HALF OF THE ORIGINAL NUMBER. WHAT IS THE ORIGINAL NUMBER?
Click here to see answer by bucky(2189)

Question 495075: Can you give me lots of examples, and the definition of a real number, rational number, irrational number, and integers. Please and thank you.
Click here to see answer by stanbon(57967)

Question 495185: classify the given numbers as real and rational, real and irrational, or complex.

1. (4) ^1/2+ 2

2. 6+0i

3. 30007.413
4. 3i
5. 1

Click here to see answer by solver91311(17077)

Question 495686: A car travels 230 miles in t hours at a speed of r. If the car travels half as fast but five times as long, how far does it travel?
Click here to see answer by oberobic(2304)

Question 356626: I need help with these questions.
1. a) Follow the instructions in the applet to fill out the 1st graphs then answer the following question: What is the impact of the new point on the standard deviation?
b) Follow the instructions to create the next two graphs then answer the following question: What did you do differently to create the data set with the larger standard deviation.
2. Go back to the applet and put points matching each of the following data set into the first graph of the applet and clear the other two graphs. Set the lower limit to 0 and the upper limit to 100.
50, 50, 50, 50, 50
Notice that the standard deviation is 0. Explain why the standard deviation for this one is zero. Don’t show just the calculation. Explain in words why the standard deviation is zero when all of the points are the same.
3. Go back to the applet one last time and set all 3 of the lower limits to 0 and upper limits to 100. Then put each of the following three data sets into one of the graphs.
Data set 1: 0, 25, 50, 75, 100
Data set 2: 30, 40, 50, 60, 70
Data set 3: 40, 45, 50, 55, 60
Note that all three data sets have a median of 50. Notice how spread out the points are in each data set and compare this to the standard deviations for the data sets. Describe the relationship you see between the amount of spread and the size of the standard deviation and explain why this connection exists. Don’t just calculate the standard deviations—explain in words.

Click here to see answer by kdebate(1)

Question 496655: PLEASE HELP WITH THIS WORD PROBLEM....IF YOU DOUBLE A NUMBER AND ADD 12,YOU GET 1/2 OF THE ORIGINAL NUMBER. WHAT IS THE ORIGNAL NUMBER?
Click here to see answer by josmiceli(9817)

Question 496658: PLEASE HELP WITH THIS WORD PROBLEM....THE DIFFERENCE BETWEEN 6 TIMES A NUMBER AND 9 IS EQUAL TO 5 TIMES THE SUM OF THE NUMBER AND 2. FIND THE NUMBER.
Click here to see answer by deborabr(181)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835