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

Tutors Answer Your Questions about real-numbers (FREE)

Question 529845: A dehydrated patient needs a 3.24% saline IV. Unfortunately, the hospital only has bags of 1% and 9%saline solution. How many liters of each of these solutions should be mixed together to yield 5 liters of the desired concentration?
Click here to see answer by josmiceli(19441)

Question 530120: Can you please answer this question: There were x people on a bus when it left A. It then stopped only at B,C,D. At B 5 people got on and nobody got off. After leaving C, there was three times as many people on the bus as when it arrived there. There were 42 people on the bus when it arrived in D. I have to form an equation in x and solve it to find the number of people on the bus when it left. A. Thank you for your time.
Click here to see answer by KMST(5328)

Question 531428: Evaluate by substituting and simplifying if e = 1.5, f = 0.3, and g = 5.
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Question 532264: What is the answer to
sqrt ( 162 )
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Question 532264: What is the answer to
sqrt ( 162 )
Click here to see answer by oberobic(2304)

Question 532264: What is the answer to
sqrt ( 162 )
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Question 532264: What is the answer to
sqrt ( 162 )
Click here to see answer by KMST(5328)

Question 532264: What is the answer to
sqrt ( 162 )
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Question 533088: how is -6 a rational number
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Question 533659: The question is, Classify the real number: -4

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Question 534041: Can you help solve the equation in the real number system
x^4-3x^3+12x^2-48x-64=0
Click here to see answer by Alan3354(69443)

Question 534420: how do you show that 3 is rational by expressing it as a ratio of two integers

Click here to see answer by algebrahouse.com(1659)

Question 536185: how to find a number between given numbers
example: 1/5 and 2/3 need to no how to find a number between these given numbers
Click here to see answer by oberobic(2304)

Question 536185: how to find a number between given numbers
example: 1/5 and 2/3 need to no how to find a number between these given numbers
Click here to see answer by Edwin McCravy(20054)

Question 536350: please help by express and put in the simplest form with rational denominator sqrt8 divided sqrt2
Click here to see answer by fcabanski(1391)

Question 536534: the tens place of a two digit number is one less than half of the ones place. three times the ones place is equal to 8 times the tens place. what is the number?
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Question 537300: f(t)=4.5e^t

and
g(x)=2^x
Click here to see answer by Alan3354(69443)

Question 537319: is .252525....... rational or irrational

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Question 537331: Freddie gets a car ride to the top of a hill, then rides his skateboard back down. The downhill ride takes 15 minutes longer than the uphill. If the car averages 32 mph, and Freddie rides his skateboard at 8 mph, find out how much time he spends skateboarding.
Let t=time spent driving to the top of the hill then, t+15=time going down the hill.
distance up=distance down
from the formula speed=distance/time(s=d/t), then d=st,
32t=8(t+15)
32t=8t+120
I can't get to the answer of 1/3 hour. I keep coming up with 1/4 hour.
Click here to see answer by richwmiller(17219)

Question 538893: the rectangle was 24 inches long and 18 inches wide what was the ratio of its length to its width?

Click here to see answer by MsRedz123(24)

Question 540221: I am not understanding some of the answers I am getting. Please clarify for the following:

Find the following. Assume that variables can represent any real number.
sqrt(a+3)^2 the answer I got was a+3.
Click here to see answer by jim_thompson5910(35256)

Question 540375: i am trying but i am getting frustrated!!! what is the greatest common factor of 10280 and 6988? are we able to find all the common factors. if not is there an easier way for me to find this? Please help!!!
Click here to see answer by Alan3354(69443)

Question 537790: I'm having trouble with a question on my algebra homework:
Graph the function. The domain is all real numbers.
The function is y = x (squared) divided by 2
*Couldn't write the equation on my iPad.. :(
What numbers could I use here for the domain?
Thanks!
Click here to see answer by jim_thompson5910(35256)

Question 539096: if a and b are real numbers, i2=-1, and (a+b)+5i=9+ai,
what are the steps to know the value of b

Click here to see answer by jim_thompson5910(35256)

Question 534919: what categories does 1/6 apply to?
Click here to see answer by jim_thompson5910(35256)

Question 541902: i need to know how to do this problem 24plus 4 divided by(-4)-3=
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Question 542394: Simplify (8+5)^0
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Question 543124: Supose that a right triangle has sides a, b, and c which happen to be Natural numbers with c the largest. if you are told nothing about whether a, b, or c are odd or even then can it be determined whether the number (a+b+c) is odd or even justify your answer.
Click here to see answer by richard1234(7193)

Question 544575: A man had dollar bills and 5 cent coins,he spent 1/3 of his money and had < $50 left,he now has 4 times as many dollars as he had 5 cent pieces and half as many 5 cent pieces as he had dollars.How much did he start with and spend ? Thanks.I am not sure how to asign values @ the start.How about 10 x + y ?
Click here to see answer by ankor@dixie-net.com(22740)

Question 545922: x^(2)-13x+42=0
Click here to see answer by JBarnum(2146)

Question 547116: please help,
-number of real solutions-
1.) -3x^2+9x-8=0
2.)8x^2-11x=-3
3.)x^2=-7x+7
4.)-4x^2-4=8x
i have a test in ALG2 today please quick response thank you
Click here to see answer by JBarnum(2146)

Question 547571: y+6/y-9
Click here to see answer by unlockmath(1688)

Question 547818: Find irrational number between 0.53 and 0.54
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Question 548947: solve for u

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Question 548947: solve for u

Click here to see answer by mathie123(224)

Question 548971: solve: -5-(2-5p)
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Question 548943: name the rational numbers from this list:
-12,0,1.88,square root 8,square root 25,5 1/4,-19 over -18, 1.1717717771.....
Click here to see answer by solver91311(24713)

Question 549148: How do I solve 5m divided by 4 equals 66? I missed class on Friday and was having trouble with this problem today. Thanks for your help. Damian M.
Click here to see answer by oberobic(2304)

Question 549172: what is a good definition of irrational and rational numbers

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Question 549567: How do I solve & put in set builder notations? -14 + -7(4-x) < 3(2x -15)
Click here to see answer by mathie123(224)

Question 549508: (1)2 + (.1)2+ (.01)2+...=?
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Question 550497: What is an irrational number?
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Question 550816: wat is 8-6 5/4?
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