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

Tutors Answer Your Questions about real-numbers (FREE)

Question 170033: Look at the numbers in the following list.
Identify the rational numbers
Negative square root of 16,Negative 3.14 (pie),Fraction 15 over 4,Fraction 14 over 3
Graph numbers on number line

Click here to see answer by midwood_trail(310)

Question 170416: g(x) = 5X/x squared + 25. Please expain to me how to go about finding the domain for this equation, I want to be able to do additional questions myself so a thorough explaination would be greatly appreceiated.
Thank You
Click here to see answer by stanbon(75887)

Question 171050: 2x(-5x-4)=4(-x+1)
Click here to see answer by checkley77(12844)

Question 171069: Find three consecutive odd integers such that three times the second minus the third is 11 more than the first.
This is what I have, 2x+1, 2x+3, 2x+5, but from there I need help please.
Click here to see answer by Earlsdon(6294)

Question 171251: How do I solve this problem? ab+c=5 I just don't get it. Help!
Click here to see answer by Mathtut(3670)

Question 171842: how do you write 0.8...repeating as a fraction or mixed number in simplest form?
Click here to see answer by jim_thompson5910(35256)

Question 172057: is 5/2 a real number?
Click here to see answer by solver91311(24713)

Question 172057: is 5/2 a real number?
Click here to see answer by Alan3354(69443)

Question 172304: suppose a=0.505005000500005000005... continuing in this way with one more zero between each successive pair of 5's. is this number rational or irrational? explain briefly?
Click here to see answer by stanbon(75887)

Question 172591: ok, I need to find the intercept And the roots of this equation...
y=20x^2 - 282(x) + 1000
so that is again y= 20 multiplied by x squared minus 282 multiplied by x plus 1000
I know they are imaginary roots but i cannot for the life of me figure this out!! PLEASE HELP
Click here to see answer by stanbon(75887)

Question 173225: How many real and imaginary soultions does the equation 4x�+13x+7=0 have?

How many real and imaginary soultions does the equation 2x�-7x+9=x+1 have?
Click here to see answer by sofiyacherni(99)

Question 173236: what is the domain of the function T(n)=2n-1?
Click here to see answer by solver91311(24713)

Question 173726: -2(0.5-4s)>-3(4+3.5s)
Click here to see answer by checkley77(12844)

Question 174270: Please help me =] :
the expression 2squareroot 5 is equivalent to?
Click here to see answer by nycsub_teacher(90)

Question 174595: a small park is in the shape of a rectangle that measures 525 feet by 468 feet.
part B.)
If the entire park is to be planted with grass seed, find the number of square feet to be seeded. Express your answer to the correct number of significant digits based on the given dimensions.
i have tried by answering part a by finding out the perimeter (1968) but then i get confused when they tell me to find the number of feet to be seeded. please help, D
Click here to see answer by Mathtut(3670)

Question 174604: An ice cream stand sells single-dip cones for $1.75 and double-dip cones for $2.25. Yesterday, 500 cones were sold for $900. How many single-dip and how many double-dip cones were sold?
Click here to see answer by Mathtut(3670)

Question 174610: A small park is in the shape of a rectangle that measures 525 feet by 468 feet. Fine the number of feet that would be needed to enclose the park. Express your answer to the nearest foot.
Click here to see answer by checkley77(12844)

Question 174613: A small park is in the shape of a rectangle that measures 525 feet by 468 feet.
a. Find the number of feet of fencing that would be needed to enclose the park. Express your answer to the nearest foot.
b. If the entire park is to be painted with grass seed, find the number of square feet to be seeded. Express your answer to the correct number of significant digits based on the given dimensions.
Click here to see answer by checkley77(12844)

Question 174617: Each of the numbers given below is different from the others. Explain in what way each is different.
2, 7, 77, 84
Click here to see answer by Alan3354(69443)

Question 174618: Is it possible for the remainder to be 2 when a prime number that is greater than 2 is divided by 4? Explain why or why not.
Click here to see answer by stanbon(75887)

Question 174615: A small park is in the shape of a rectangle that measures 525 feet by 468 feet.
a. Find the number of feet of fencing that would be needed to enclose the park. Express your answer to the nearest foot.
b. If the entire park is to be painted with grass seed, find the number of square feet to be seeded. Express your answer to the correct number of significant digits based on the given dimensions. : A small park is in the shape of a rectangle that measures 525 feet by 468 feet.
c. The grass seed to be purchased is packaged in sacks, each of which holds enough seed to cover 25,000 square feet of ground. How many sacks of seed are needed to seed the park?
Click here to see answer by Alan3354(69443)

Question 174622: A plum and a pineapple cost the same as three peaches. Two plums cost the same as a peach. How many plums cost the same as a pineapple?
Click here to see answer by stanbon(75887)

Question 174625: The perimeter of a square whose area is 81 square centimeters is?
Click here to see answer by josmiceli(19441)

Question 174623: Fred bought three shirts, each at the same price, and received less than $12.00 in change from a $50.00 bill.
a. what is the minimum cost of one shirt?
b. what is the maximum cost of one shirt?
Click here to see answer by edjones(8007)

Question 174624: A trapezoid is a quadrilateral with only one pair of parallel sides called the bases of the trapezoid. The formula for the area of a trapezoid is A= h/2(b^1+b^2) where h represents the measure of the altitude to the bases, and b^1 and b^2 represent the measures of the bases. Find the area of a trapezoid if h= 5.25 cm, b^1 = 12.75 cm, and b^2 = 9.50 cm. Express your answer to the number of significant digits determined by the given data.
Click here to see answer by MathLover1(20849)

Question 174657: How many significant digits are in 20.50?
Click here to see answer by tutorcecilia(2152)

Question 174660: One element of the solution set of (x ≤ -3) or (x > 5) is
a. -4
b. -2
c. 5
d. none of the above. The solution set is the empty set.
Click here to see answer by Mathtut(3670)

Question 174659: Which of the following sets is closed under division?
a. nonzero whole numbers
b. nonzero integers
c. nonzero even integers
d. nonzero rational numbers
Click here to see answer by Edwin McCravy(20054)

Question 174656: A trapezoid is a quadrilateral with only one pair of parallel sides called the
bases of the trapezoid. The formula for the area of a trapezoid is A=
h/2(b^1+b^2) where h represents the measure of the altitude to the bases, and
b^1 and b^2 represent the measures of the bases. Find the area of a trapezoid if
h= 5.25 cm, b^1 = 12.75 cm, and b^2 = 9.50 cm. Express your answer to the number
of significant digits determined by the given data.
Click here to see answer by Mathtut(3670)

Question 174692: A trapezoid is a quadrilateral with only one pair of parallel sides called the
bases of the trapezoid. The formula for the area of a trapezoid is A=
h/2(b^1+b^2) where h represents the measure of the altitude to the bases, and
b^1 and b^2 represent the measures of the bases. Find the area of a trapezoid if
h= 5.25 cm, b^1 = 12.75 cm, and b^2 = 9.50 cm. Express your answer to the number
of significant digits determined by the given data.
Click here to see answer by jim_thompson5910(35256)

Question 174696: Each of the numbers given below is different from the others. Explain in what way each is different.
2 7 77 84
Click here to see answer by Alan3354(69443)

Question 174711: A quadrilateral has four sides. Quadrilateral ABCD has three sides that have equal measures. The measure of the fourth side is 8.0 cm longer than each of the other sides. If the perimeter of the quadrilateral is 28.0 m, find the measure of each side using the correct number of significant digits.
Click here to see answer by Mathtut(3670)

Question 175113: a=h/2(b1+b2)
h=7 b1=8 b2=14
Click here to see answer by checkley75(3666)

Question 175275: shelly and jack left from the same place at the same time and drove in opposite directions along a straight road. Jack traveled 15 miles per hour faster than shelly. After 3 hours, they were 315 miles apart. Find the rate at which each traveled.
Click here to see answer by agosset(4)

Question 175447: Find the X and Y-intercepts of the line y-3= 3/4(X+4). Write you answers as an ordered pair.
I know that 3/4 is the slope or m. But i dont remember how to us the fomula for b= -a/b correctly. please walk me through so i can complete the steps?
Click here to see answer by Mathtut(3670)

Question 175450: Given: X is an intreger.

Conjecture: -X is an intreger

I said the conjecture was true because the intreger could be any positive or negative number but my teacher said I need to complete the problem and include a definition of an intreger. My book does not provide a definition.
Click here to see answer by Mathtut(3670)

Question 175445: Given:1 over X is less than or equal to 1 for 1,2 and 3
Conjecture: 1 over X is greater than or equal to 1 for all reals.
I already know that the conjecture is false but my teacher didnt like my reasoning for it. I said that 1,2 and 3 are all reals but not every number will work in this problem such as an integer that is negative or an irrational number. If I said something wrong please correct me.
Click here to see answer by Mathtut(3670)

Question 175472: can someone please help me solve the following problems

Solve the following:
1. 2/7 - 1/3 = ?
2. 4/5 x 15/2 = ?
3. 2 1/2 � 3/4 = ?

Click here to see answer by jim_thompson5910(35256)

Question 175486: I need help with these problems, can someone help please
Simplify the following:

3 - 2^2 - { 4 * 3 - (6 - 8)} + 12/4

Click here to see answer by actuary(112)

Question 175525: please help me Simplify:

My answer after canceling the a's and I kept the same sign (-) I tried to show the -1 without brackets

Click here to see answer by Alan3354(69443)

Question 175544: What does the little number inside the "v" of the square root sign mean?
I'm trying to help my son & don't remember ever learning that one.
example:
suare root of -8 with a little "3" in the "v"
Thanks!
Stephanie
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