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All Questions
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229719 Questions
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172
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Algebra
The roots of x^2 + 5x + 3 = 0 are p and q. Find 1/p + 1/q.
Guest
Dec 12, 2021
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334
1
Counting question
How many subsets of the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} contain the number 5 and have 3 elements?
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Guest
Dec 12, 2021
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311
1
Factorials
Find the value of n that satisfies n-(n+1)!+6n!=n!+4, where n!=n*(n-1)*(n-2)***2*1 .
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Guest
Dec 12, 2021
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407
1
Arturo
Dahila wants to build a sandbox that has a perimeter of 26 meters. The length is 7 meters. What is the width of their sandbox
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Guest
Dec 12, 2021
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196
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Algebra
The teacher has written an equation of the form on the board, where is a quadratic, but Heather can't read the linear term. She can see that the quadratic term is 4x^2 and that the constant is -24. She asks her neighbor,
read more ..
Guest
Dec 12, 2021
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254
2
Sum
Evaluate the sum 1/3 + 2/3^2 + 1/3^3 + 2/3^4 + ...
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Guest
Dec 12, 2021
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272
1
Geometry
What is the largest angle measure in a triangle with sides of lengths 3, 5, and 4?
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Guest
Dec 12, 2021
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179
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Polynomial
The polynomial
f(x) = a_n x^n + a_{n - 1} x^{n - 1} + ... + a_2 x^2 + a_1 x + a_0
has integer coefficients, and its roots are distinct integers.
read more ..
Guest
Dec 12, 2021
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182
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Polynomial
Let be a polynomial of degree 5 such that p(n) = n/(n^2 + 1) for n = 2, 3, ..., 7. Find p(8).
Guest
Dec 12, 2021
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173
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Algebra
If ab = 10 and a^2 + b^2 = 40, then find (a + b)^4.
Guest
Dec 12, 2021
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294
3
math problem
Camy made a list of every possible distinct five-digit positive integer that can be formed using each of the digits 1, 3, 4, 5 and 8 exactly once in each integer. What is the sum of the integers on Camy's list?
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Guest
Dec 12, 2021
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204
2
help…
Jacob, Thomas and Harry shared a box of marbles. The number of marbles Jacob took was 4 more than 1/3 of the marbles in the box. The number of marbles Thomas took was 12 more than 1/2 of the remaining marbles. Harry took the last 8 marbles that were left.
read more ..
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Guest
Dec 12, 2021
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214
1
trig
In triangle DEF, angle D = 30º, angle F = 60º, and EF = 6. Find [DEF].
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Guest
Dec 12, 2021
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282
2
I'm not sure
For how many values of is it true that:
(1) is a positive integer such that a≤50
(2) the quadratic equation $x^2 + (2a+1)x + a^2 = 0$ has two integer solutions?
I tried to substiture the a with a value less
read more ..
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Guest
Dec 12, 2021
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217
1
help math
What is the smallest five-digit plaindrome that is divisble by $17$?
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Guest
Dec 12, 2021
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222
1
Help counting
In how many ways can the digits of 45,520 be arranged to form a 5-digit number that is even?
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Guest
Dec 12, 2021
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249
2
surface area URGENT PLS ANSWER FAST
Two cubes of volumes 8cm^3 and 27cm^3 are glued together at their faces to form a solid with the smallest possible surface area. What is the number of square centimeters in the surface area of the resulting solid? please help thank you
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Guest
Dec 12, 2021
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222
1
Number Theory
How many positive three-digit integers with each digit greater than 4 are divisible by 8?
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Guest
Dec 12, 2021
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165
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Algebra
Find all pairs (x,y) of real numbers such that x + y = 10 and x^2 + y^2 = 56 + 2xy.
For example, to enter the solutions (2,4) and (-3,9), you would enter "(2,4),(-3,9)" (without the quotation marks).
Guest
Dec 12, 2021
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214
1
math problem
There exist several positive integers x such that 1/(x^2 + 2x) is a terminating decimal. What is the second smallest such integer?
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Guest
Dec 12, 2021
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223
1
help plz
What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial: $(3x+2)(18x-\Box )$?
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Guest
Dec 12, 2021
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330
1
help
Consider the expression
Find all possible values for the missing number (__) that make this expression the square of a binomial.
x^2+18x+__
If you find more than one, then list the values separated by commas.
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Guest
Dec 12, 2021
0
263
1
Counting question
In a certain Algebra 2 class of 23 students, 11 of them play basketball and 13 of them play baseball. There are 6 students who play neither sport. What is the probability that a student chosen randomly from the class plays both basketball and baseball?
read more ..
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Guest
Dec 12, 2021
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219
1
Parabola
The vertex of a parabola is at (12,-4), and its axis of symmetry is vertical. One of the x-intercepts is at (-15,0). What is the x-coordinate of the other x-intercept?
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Guest
Dec 12, 2021
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315
2
Algebra
Given (14x + 22)/(x + 2) = -3x - 1, compute the sum of all the possible values of x. Express your answer as a fraction.
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Guest
Dec 12, 2021
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