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

Tutors Answer Your Questions about real-numbers (FREE)

Question 178235: can someone help me solve this graph problem
Solve and graph:

-3(x – 2) – (1/2x + 2) > 1/4x + 3 - 16

Click here to see answer by stanbon(57387)

Question 178139: Is it possible to add real numbers without knowing how to calculate a-b with a and b both non-negative and a>b?

Click here to see answer by cartert(27)

Question 178505: How many points, integers, rational and irrational numbers are in each of these sets? What lengths are associated with each of the sets?
1) {3}
2) {3, 4}
3) [2, 4)
4) [3, 8]
Click here to see answer by solver91311(16897)

Question 178640: Find the value of x and y if: 5x -3y = 35 and y = x-y
Click here to see answer by checkley75(3666)

Question 178658: Find the value of x and y if: 5x -3y = 35 and y = x-y
Click here to see answer by Fombitz(13828)

Question 178808: Factor 9x^2 - 48x+64
Click here to see answer by Mathtut(3670)

Question 178957: The sume of the reciprocals of two consecutive odd integers is 20/99. Find the integers.

A plane and a truck leave the same town at sunrise and head for a town 450 miles away. The spead of the plane is 3 times the speed of the truck, and the plane arrives 6 hours ahead of the truck. Find the speed of the plane.

Click here to see answer by Mathtut(3670)

Question 179037: subtracting real numbers
-100-(-6)=
-7-7=
72-98=
Click here to see answer by Mathtut(3670)

Question 179087: Is (-10) - 7 = -17 If this is the correct answer, explain. Thank you.
Click here to see answer by stanbon(57387)

Question 179087: Is (-10) - 7 = -17 If this is the correct answer, explain. Thank you.
Click here to see answer by solver91311(16897)

Question 179327: can someone please help me with this problem
Which of the following ordered pairs is a solution of 3x - 2y = - 19
(2, -5) (-5, 2) c (-5, 3) (-5, -2)

Click here to see answer by Fombitz(13828)

Question 179350: v-4(4-v)=-2(2v-1)
Click here to see answer by Mathtut(3670)

Question 179449: Please help me solve this equation: 2x + 4 = 10 , then x=3
thank you..
Click here to see answer by vleith(2825)

Question 179474: Gwen bought a new Toyota Corolla. The
selling price plus the 8% state sales tax was $15,714. What
was the selling price?
Click here to see answer by Alan3354(30993)

Question 179450: Please help me solve this equation: 1/2 (2x) = 1/2 (6)
thank you sir..
Click here to see answer by Alan3354(30993)

Question 179799: write each rational number in the form a/b where a and b are integers and b = 0.
a.) 0.3
b.)5 1/3
c.)0
d.)73
e.)-0.21
Click here to see answer by stanbon(57387)

Question 179924: Use the quadratic formula to find the roots of 3x^2+10x-5=0
Click here to see answer by Mathtut(3670)

Question 179919: What is the formula for the equation which has the the points (1,8) and (-1,12)?
Click here to see answer by Slayer(3)

Question 180054: What is the value of the fraction 15 -x / x +1 undefined?
Click here to see answer by nerdybill(6962)

Question 180050: If x =6 , y =4, and z =3, evaluate x^-2y^0/z^3
Click here to see answer by Mathtut(3670)

Question 180138: Add: 10x^2 +7x - 15
4x^2 -8x +7
Click here to see answer by checkley77(12569)

Question 180240: For each of the following, identify the whole number properties that are illustrated.
2(3+4)=2(4+3)
5+7=7+5
1*14=14=14*1
5(9+3)=5*9+5*3
2+(3+2)=(2+3)+2
5(3*4)=(5*3)4
Click here to see answer by solver91311(16897)

Question 180203: y-3>2y+5
Click here to see answer by Mathtut(3670)

Question 180597: can someone please help me with this problem
Find 649 - 9(13 - 22)
Click here to see answer by Alan3354(30993)

Question 181096: im not sure what this falls under. it has been years since ive done alg. :
The question ask: For any positive integer n, (((n+1)!)/(n!))-n = ?
answers: (a) 0 (b) 1 (c) n (d) n+1 (e) n!
I really dont remember what the ! stands for so i dont know how to go about looking for help.
Click here to see answer by Alan3354(30993)

Question 181564: The name of this book is "Introductory Algebra" By Keedy/Bittinger.6th edition.
The page number is 102 problem #37. I am homeschooling my daughter and am having some trouble solving this problem. Thanks for any help you might can offer.
3{[7(x-2)+4]-[2(2x-5)+6]}
If you could please help to solve this and also explain what the different parentheses mean..
thank you so much
J.T
Click here to see answer by Earlsdon(6287)

Question 181563: The name of this book is "Introductory Algebra" By Keedy/Bittinger.6th edition.
The page number is 102 problem #37. I am homeschooling my daughter and am having some trouble solving this problem. Thanks for any help you might can offer.
3{[7(x-2)+4]-[2(2x-5)+6]}
If you could please help to solve this and also explain what the different parentheses mean..
thank you so much
J.T
Click here to see answer by stanbon(57387)

Question 182545: What is the value of x in the proportion 32:(x+2) = 20:(25+x)?
Click here to see answer by Alan3354(30993)

Question 182655: 2 sq rt3 + sq rt7 over 3 sqrt3 - sqrt7
Click here to see answer by edjones(7569)

Question 182805: The numerator of a fraction is 6 less than the denominator. If the numerator is multiplied by 2 and the denominator remains unchanged, the resulting fraction is equivalent to 1/2. Find the original fraction.
Click here to see answer by josmiceli(9697)

Question 182811: I had a test today on multiplying and dividing
real numbers and my head went absolutely blank

1.
and the other one is this
2.
Click here to see answer by Edwin McCravy(8909)

Question 182823: Simplify 3a^2-8a-35/a-5.
Click here to see answer by nerdybill(6962)

Question 182898: The lengths of a quadrilateral are in the ratio 2:3:4:5. The perimeter of the quadrilateral is 42 centimeters. How long is each side? Show your work.
Click here to see answer by solver91311(16897)

Question 182912: 9+5x+(-9)=17+(-9)
What propert or principle is demonstrated in this situation?
Click here to see answer by jim_thompson5910(28598)

Question 182913: Karen wants to bake a cake. The recipe calls for 2 cups of flour.
a. How many tablespoons of flour are needed?
b. Karen only has 28 tablespoons of flour. What percent of a cake can she bake?
c. Karen needs 1 1/2 cups of sugar. How many tablespoons of sugar should she use?
Click here to see answer by Mathtut(3670)

Question 182917: The following diagram shows the measurements of a cylindrical tuna fish can. The radius is 1.29 in. and the height is 1.5 in.
a. Determine the lateral surface area of the can using the expression 2 times pie times r times h.
b. Determine the total area of the top and bottom conponents of the can using the expression 2 times pie times r^2
c. Determine the total surface area of the the can by adding the two areas from parts a and b. Do not use significant digits
Click here to see answer by solver91311(16897)

Question 182910: Lean made a scale drawing design for a tile floor. It measured 9 inches in length and 15 inches in width. The actual width of the tile floor will be 75 inches. If Leah uses 3-inch square tiles to tile the floor, and the floor is proportional to her drawing, how many tiles will she need?
Click here to see answer by josmiceli(9697)

Question 182899: A nursing student took a patient's pulse and determined his heart rate to be 74 beats per minute. At the same time, a monitor measured the patient's heart rate to be exactly 1.3 beats per second. Calculate the student's percent of error to the nearest tenth of a percent.
Click here to see answer by stanbon(57387)

Question 182959: what is 1/12 best described as?
Click here to see answer by rapaljer(4667)

Question 183200: "suppose x^2+a^2x+a^2 factors into (x+a)^2. what is the value of a, that is not zero?"
Click here to see answer by jim_thompson5910(28598)

Question 183721: Is the following numbers rational or irrational numbers. Can you explain to me why?
12.5555...
2.1273685...
548/799
Click here to see answer by edjones(7569)

Question 184064: Evaluate the following expression based on x=-3, y=2, and z=-4.
x^2-4zy.
Click here to see answer by MathGuyJoe(20)

Question 185369: According to Joule's Law, the heat Q dissipated by a current I passing for t seconds through a resistance R is given by
Q = I^2Rt/J,
where is the mechanical equivalent of heat.
Solve for R.

Click here to see answer by edjones(7569)

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