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

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Algebra: Real numbers, Irrational numbers, etc

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Question 42698: state whether each of the following is true or false for all real numbers x
a)
sq rt x^2 = x
b)
sq rt x^2 + 9 = x+3
c)
2x+y/4=x+y/2
d)
sq rt 1-x= -sq rt x-1

Click here to see answer by rajagopalan(125)

Question 24251: 3 consecutive odd intergers whose sum is -57.
Click here to see answer by fractalier(1804)

Question 43231: 2x(-3x-5x)
Click here to see answer by aaaaaaaa(138)

Question 43565: Express 3+i/1+2i in the form a+bi where a and b are real numbers. Thanks!
Click here to see answer by Nate(3495)

Question 43898: I am stuck on this equation. Any help would be appreciated.
x^3+2x^2+x+12 over x+3
Click here to see answer by benni1013(141)

Question 43829: does algebra have to do with the world around us?
Click here to see answer by fractalier(1804)

Question 44000: -27+(-16)=?
Click here to see answer by adamchapman(301)

Question 44001: -18+75
Click here to see answer by adamchapman(301)

Question 44128: Give an example of a number that is a rational number, but not an integer.
Click here to see answer by fractalier(1804)

Question 44127: Give an example of a number that is a real number, but not a rational number.
Click here to see answer by fractalier(1804)

Question 44154: solve by any method you prefer.
m^2 = 4m
Click here to see answer by adamchapman(301)

Question 44155: solve by any method you prefer.
2x^2 + 12x = -18
Click here to see answer by adamchapman(301)

Question 44159: solve. approximate irrational roots to the nearest tenth.
If the sides of a square plot of ground are increased by 1 m, its area becomes 225 m^2. Find the length of the sides of the original plot. (units optional)
Click here to see answer by adamchapman(301)

Question 44156: solve by any method you prefer.
y^2 - 4y + 3 = 0
Click here to see answer by adamchapman(301)

Question 44151: solve by any method you prefer.
3w^2 - 16 = 0
Click here to see answer by fractalier(1804)

Question 44158: solve. approximate irrational roots to the nearest tenth.
The length of a rectangle is 3 cm greater than its width. The area of the rectangle is 180 cm^2. find the length and width. (units optional)
Click here to see answer by adamchapman(301)

Question 44152: solve by any method you prefer.
x^2 + 8x + 1 = 0
Click here to see answer by fractalier(1804)

Question 44150: solve by any method you prefer.
u^2 - 15u = -1
Click here to see answer by fractalier(1804)

Question 44157: solve. approximate irrational roots to the nearest tenth.
The difference of the square of a number and the number is 12. find the number.
Click here to see answer by fractalier(1804)

Question 44160: solve. approximate irrational roots to the nearest tenth.
Together Anna and Carla can spray- paint a van in 8 hours. Alone it takes Anna 2 hours less than Carla. Find the time it takes each of them to paint the van alone. Give your answers to the nearest tenth of an hour. (units optional)
Click here to see answer by fractalier(1804)

Question 44161: solve. Approximate irrational roots to the nearest tenth.
The volume V of a pyramid varies jointly as its altitude H and the area of its base. A pyramid with a nine-inch square base (a square base 9 inches on each side) and an altitude of 10 inches has a volume equal to 270 in^3. Find the volume of a pyramid with an altitude of 6 inches and a square base 4 inches on each side. (units optional)
Click here to see answer by fractalier(1804)

Question 44588: I need help with this question:
Helen has 1/5 of her portfolio in US stocks, 1/8 in European stocks, and 1/10 in Japanese stocks. The remainder is in municipal bonds. What FRACTION of of her portfolio is in Municipal bonds? What PERCENT is invested in municipal bonds?
Click here to see answer by Nate(3495)

Question 45212: What is the answer to this problem...
-9 - (-2.3) = -9 + (?)
Click here to see answer by rapaljer(3616)

Question 45299: 4*1/4z=6
Click here to see answer by tutorcecilia(2042)

Question 45353: If X is any real number than X to the power of 1 =
Click here to see answer by fractalier(1804)

Question 45383This question is from textbook algebra 1 concepts and skills
: well i got into algebra 1 in eighth grade and the graphing and he multiplying is a problem for me. i think i need help on it.This question is from textbook algebra 1 concepts and skills

Click here to see answer by rapaljer(3616)

Question 45478: Find the product. I am struggling with this one. Thanks
[( 4x - y) + 3z][( 4x - y) - 3z]

Click here to see answer by jake_6233(74)

Question 45482: Find the product.
(2r-11)(2r+11)
Click here to see answer by Nate(3495)

Question 39571:
Click here to see answer by linda :](3)

Question 45818: Find the product. I can't seem to figure this one out.
[(4x-y)+3z][(4x-y)-3z]
Click here to see answer by checkley71(8405)

Question 45833: 4-3i
1+2i
Clarification, 4-3i is over 1+2i
Thank you, Michelle Turner
Click here to see answer by stanbon(26259)

Question 45834: (4-i)'2 +2(3-2i)-4
Clarification. the '2 is square. Did you know how to write equations in here?
Thank you, Michelle
Click here to see answer by stanbon(26259)

Question 45882: Hi could you please help me with this?
i^34
Is it 34? I know i=-1 right?
Thank you
Click here to see answer by Nate(3495)

Question 45882: Hi could you please help me with this?
i^34
Is it 34? I know i=-1 right?
Thank you
Click here to see answer by Earlsdon(4898)

Question 45993: Find the discriminant. Then use it to deteremine the number and type of solutions.
1.) m^2-4m-4=0
2.) 6y^2=4y-7
Thank you for your help!!!
Click here to see answer by Nate(3495)

Question 46071: Hello,
I know the number 4 is a natural and whole number. But is it an integer, real or irrational? Why or why not?
Thank you very much~!

Click here to see answer by Nate(3495)

Question 46123: Find all solutions by factoring

Click here to see answer by checkley71(8405)

Question 47151: Hello, I haven't done any work on this problem because I don't understand the explaination in the book. (Saxon) Can you please help me? Thank you!
Question:
Between which 2 consecutive whole numbers does the square root of 250 lie? The square root sign has a little "5" above it's arm on the left.

Click here to see answer by Earlsdon(4898)

Question 47283: Write the rational expression in lowest terms.

Click here to see answer by checkley71(8405)

Question 47570: Find the center and radius of the circle whose equation is give by
x^2+y^2+6x-10y=2
Click here to see answer by Nate(3495)

Question 47678: i am not sure i understand how to do this
A = 1/2bh
A = 1/2 (2.75)(8.25)

Click here to see answer by Nate(3495)

Question 47750: What would 7.059 be classified: real, integer, whole, natural, rational, and/or irrational?
I am doing a summer packet for school and I have read the lesson many times. It does not clearly state what a decimal such as 7.059 would be classified as.
Click here to see answer by atif.muhammad(135)

Question 47719: Multiply and Simmplify
(4-5i)(3+i)
Click here to see answer by pizza(14)

Question 47873This question is from textbook Beginning Algebra

: Find two consecutive integers such that the sum of 2 times the first integer plus 5 times second integer is 26.This question is from textbook Beginning Algebra

Click here to see answer by Nate(3495)

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