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Post New Question
All Questions
+0
230706 Questions
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476
2
help
How many rearrangements of the letters FACEBOOK have the two O's not together?
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Guest
Dec 27, 2021
0
215
2
Geometry
In trapezoid PQRS, Base PQ is parallel to base RS. Let point X be the intersection of diagonals PR and QS. The area of triangle PQX is 20 and the area of triangle RSX is 48. Find the area of trapezoid PQRS.
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Guest
Dec 27, 2021
0
223
2
Probability
Two different 2-digit numbers are randomly chosen and multiplied together. What is the probability that the resulting product is a multiple of 3?
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Guest
Dec 27, 2021
0
261
2
Geometry
The tangent to the circumcircle of triangle WXY at X is drawn, and the line through W that is parallel to this tangent intersects at Z. If XY = 14 and $WX = 11$ find YZ.
read more ..
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Guest
Dec 27, 2021
0
238
1
Probability
A coin is tossed 10 times. How many different sequences of tosses could there have been, if at least $5$ of the tosses were heads?
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Guest
Dec 27, 2021
0
211
1
Counting problem
In how many ways can you change a 20 dollar bill using 10 dollar bills, 5 dollar bills, 2 dollar bills, and 1 dollar bills?
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Guest
Dec 27, 2021
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214
1
Algebra
If x and y satisfy (x-3)^2 + (y- 7)^2 = 64, what is the minimum possible value of x^2 + y^2?
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Guest
Dec 27, 2021
0
237
1
Counting
How many integers between 500 and 1000 contain both the digits 3 and 4?
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Guest
Dec 27, 2021
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331
1
+12
help! is there an easy way to do this?
Suppose each of the nine digits is used exactly once as a digit in either the four-digit positive integer or the five-digit positive integer . What is the smallest possible value of if ?
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ahz001
Dec 27, 2021
0
216
1
Algebra
Form a quadratic polynomial whose zeroes are 3 - sqrt(3)/5 and 3 + sqrt(3)/5.
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Guest
Dec 27, 2021
+10
337
1
+483
Find this polynomial
Let be the roots of where is some real constant. Let Then the product can be expressed as a polynomial in Find this polynomial.
Any help would be appreciated!!!
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abcdefghijklmnopqrst
Dec 27, 2021
0
279
1
Rolling dice
Harry rolls four fair 10-sided dice. What is the probability that exactly three of the dice show a prime number?
Thanks for help.
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Guest
Dec 27, 2021
0
301
1
PLEASE HELP!
If m + 1 = n − 2 3 , what is the value of 3m − n ?
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Guest
Dec 27, 2021
0
383
2
Ratios
The ratio of milk and water in a vessel is 19:7. When 'a' ltr milk is added this ratio becomes 3:1. Again 'b' Itr water is subtracted and new ratio is 7:2. Now 7.5 Itr milk is added to mixture and 2.5 Itr water is extracted than ratio of milk and water
read more ..
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Guest
Dec 27, 2021
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407
1
hard math problem
1: prove that two nonzero (integer) perfect squares cannot differ by 1.
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Guest
Dec 27, 2021
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236
1
Mixed Numbers
A person has $40 1/2. How many pens, each costing $2 1/4 can he buy?
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Guest
Dec 27, 2021
+1
365
2
Geometry
An equilateral triangle of side length 2 is inscribed in a circle. A rectangle, with side lengths x and y, is inscribed in another circle of the same size as the first one. If the area of the rectangle is the same as that of the triangle, what
read more ..
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Guest
Dec 27, 2021
0
312
1
Function
Let
f(x) = x^2 - 4 if x < 7
f(x) = x + 13 if x >= 7
What is f(f(f(17)))?
read more ..
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Guest
Dec 27, 2021
0
236
2
Decimals
What is the 2007th digit to the right of the decimal point in the decimal expansion of 4/7?
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Guest
Dec 27, 2021
0
312
1
Decimals
Write 1/5 + 1/5^2 + 1/5^3 as a decimal.
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Guest
Dec 27, 2021
0
267
1
Decimals
Write the repeating decimal $0.\overline{515}$ as a fully simplified fraction.
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Guest
Dec 27, 2021
0
219
1
Decimals
Write $\frac{99}{100} (0.\overline{42})$ as a fully simplified fraction.
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Guest
Dec 27, 2021
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274
2
Help probability
I have two cubes such that, on each cube, three faces are painted red and three faces are painted white. If I roll each of the cubes once, what is the probability that they will land such that there are two red faces up?
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Guest
Dec 27, 2021
0
354
3
+11
helppppp
A right triangle with integer leg lengths is called cool if the number of square units in its area is equal to three times the number of units in the sum of the lengths of its legs. What is the sum of all the different possible areas of cool right triangles?
read more ..
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oTechz
Dec 27, 2021
0
224
1
Decimals
Let $y = 0.(\overline{123}) + (\overline{345})$. When y is written out as a repeating decimal, what is the sum of the digits in a single repeating period? (In other words, what is the sum of the digits covered by the repeat bar?)
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Guest
Dec 27, 2021
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