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

Tutors Answer Your Questions about real-numbers (FREE)

Question 357302: I need help with mixturee numbers. Here is an ex: A pharmacist has 20 grams of a 10% solution of alcohol. How many grams of a 6% alcohol must be added to form an 8% alcohol?
Click here to see answer by Theo(13342)

Question 357704: How do you figure out 4/5(-15/11)=
Click here to see answer by rfer(16322)

Question 358273: i need help with solving problem and if possible can walk me thru answer
5x 6x+18
------.------
x^2-9 15x^3
Click here to see answer by stanbon(75887)

Question 358273: i need help with solving problem and if possible can walk me thru answer
5x 6x+18
------.------
x^2-9 15x^3
Click here to see answer by mananth(16946)

Question 358746: What is the additive inverse of -1.3?
Click here to see answer by Fombitz(32388)

Question 359019: convert 317 eight to base ten.
Click here to see answer by Fombitz(32388)

Question 359019: convert 317 eight to base ten.
Click here to see answer by ewatrrr(24785)

Question 359020: Convert 3002 six to base ten.
Click here to see answer by Fombitz(32388)

Question 359557: Can you help me with this problem?
find slope if it exists of the line containing the pair of points (-2,-16,
(-9, -18)
Slope is ???
If I do y2 - y1/x2 - x1
-16 - (-18) / -2 - (-9) = -16 + 18/ -2 +9
= (2, 7)
Would the slope of the line be 2? Or (2,7)?
Thanks for your help

Click here to see answer by Fombitz(32388)

Question 359651: The question is:
Find the slope of the line.
The slope of the line is m =

Is the answer for this y=mx + b?
I am a little confused by the question. Thank you.
Click here to see answer by stanbon(75887)

Question 360630: Which symbol belongs between each pair of numbers? <, >, or =
a) 11/23 and 33/65
b) 7/8 and 8/9
c) -6/7 and -11/33
I tried to use the LCD got totally confused what to to next? What steps do I need to take to solve this?
Click here to see answer by Alan3354(69443)

Question 360629: Wheel's Bicycle shop advertised a bicycle for 15% off for a savings of $36. The bicycle did not sell, so it was offered at a new 20% discount off the sale price.
a) What did the bicycle sell for regularly? this is where I was stuck, how to find the original price of the bike
b) What is the amount of the new discount?
Click here to see answer by mananth(16946)

Question 360628: Classify each of the following as a rational or irrational number.
a. square root 2+8
b. 7/22
c. 3.14114111411114
Click here to see answer by stanbon(75887)

Question 360714: Perform the indicated operation.
(9+4i)(9-4i)
Click here to see answer by Alan3354(69443)

Question 361805: 2x/2=x solve for x
Click here to see answer by robertb(5830)

Question 362000: Factor each perfect square trinomial.
4w^2 + 4w + 1
Click here to see answer by Alan3354(69443)

Question 362471: Pi is an irrational number. Could pi equal 22/7? Why or
why not?
Click here to see answer by Fombitz(32388)

Question 362741: 0.2 as a repeating decimal.
Click here to see answer by Manny Pacquiao(82)

Question 363295: 6.45 & 13/2 Find real number bewtween each pair of numbers
Click here to see answer by Fombitz(32388)

Question 363965: find the number of calories in a stalk of celery and in a carrot
(1) a carrot has 13 calories more than a celery stalk
(2) five carrots and 10 celery stalks have only 170 calories
Click here to see answer by stanbon(75887)

Question 364127: Im trying to figure out this problem it says to evaluate
4(-2)(-1)(5)(-2)
Click here to see answer by Alan3354(69443)

Question 364337: write the fraction as an equivalent with the indicated denominator
5/11 with a denominator of 33
Click here to see answer by mananth(16946)

Question 364363: Factor completely.
2x^3+4x^2-30x
Click here to see answer by mananth(16946)

Question 364361: Factor by grouping
15x^2+10x+18x+12
Click here to see answer by mananth(16946)

Question 364358: Find the gcf for the list.
21m^4, 189m^7, 441m^5
Click here to see answer by nyc_function(2741)

Question 364360: Factor the four term polynomial by grouping
15x^2-12x-10x+8
Click here to see answer by edjones(8007)

Question 364359: Factor out the greatest common factor.
3x^2y^5+18x^2y^4
Click here to see answer by Fombitz(32388)

Question 364511: factor
x^2+8x+16
Click here to see answer by ewatrrr(24785)

Question 364514: factor completely
16x^2-25
Click here to see answer by Alan3354(69443)

Question 364512: complete the factoring
x^2-2x-24=(x-6)( )
Click here to see answer by Alan3354(69443)

Question 364510: factor as completely as possible. if unfactorablke, indicate that the polynomialb is prime.
8x^2+18x+9
Click here to see answer by nerdybill(7384)

Question 364509: factor completely
x^2+2x-80
Click here to see answer by ewatrrr(24785)

Question 364546: use descriminant in factoring 4x^2 - 27x + 5
Click here to see answer by ewatrrr(24785)

Question 364662: Is dividing by a number the same as multiplying by the opposite of the number? why?
Click here to see answer by rfer(16322)

Question 364783: x= sqrt( 0)
Click here to see answer by Fombitz(32388)

Question 366072: Name the set(s) of numbers to which 0.16 belongs.
Click here to see answer by solver91311(24713)

Question 366072: Name the set(s) of numbers to which 0.16 belongs.
Click here to see answer by CharlesG2(834)

Question 366092: Name the set(s) of numbers to which �5 belongs.
Click here to see answer by fractalier(6550)

Question 366575: Could you explain Real Numbers in a simple way? I'm not quite understanding it. Are they all numbers? For example, I have a question that says to list all real numbers equal to or greater than 6. I have no idea what that means.
Click here to see answer by jim_thompson5910(35256)

Question 366268: Factor Completely:
-9x^2 +12xy -4y^2
I tried -(9x^2 - 12xy +4y^2)
Then I did this -(3x-2y)(3x-2y), But it equals the original equation when I check it...but is that the answer or is it -(3x-2y)^2?

Click here to see answer by Fombitz(32388)

Question 367513: write as fraction
0.0593
-3.701
3.8855
-0.0257
Click here to see answer by stanbon(75887)

Question 367512: write 0.0593 as a fraction
Click here to see answer by rfer(16322)

Question 367602: Consider the equation x2 � 4x + 29 = 0.
(a) Compute the discriminant, b2 � 4ac and state whether there is one real-number solution, or two different real-number solutions, or two different imaginary-number solutions.

(b) Use the quadratic formula to find the exact solutions of the equation. Show work.

Click here to see answer by mananth(16946)

Question 368306: the sum of 5 consecutive integers is 565.Find the largest integer.
Click here to see answer by Alan3354(69443)

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, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590