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All Questions
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234923 Questions
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197
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Number Theory
A positive two-digit integer ab is a multiple of a-b. How many such integers are there?
Guest
Oct 10, 2021
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280
1
Digits
A, B, C, and D are positive digits such that ABCD + BCD + CD + D + 377 = 2012. Find A + B + C + D
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Guest
Oct 10, 2021
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180
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Counting problem
How many ways are there to put 5 balls in 3 boxes if the balls are not distinguishable, and the boxes are not distinsuishable?
Guest
Oct 10, 2021
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211
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math question
The digits 1, 2, 5, 6, and 9 are all used to form five-digit even numbers in which no digit is repeated. What is the third-largest of these numbers?
Guest
Oct 10, 2021
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410
1
What is the value of $c$ for which the inequality $x\cdot(3x+1)
What is the value of $c$ for which the inequality $x\cdot(3x+1)
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Guest
Oct 10, 2021
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356
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Let A be an angle such that tan(A)=1/2. Find the value of tan(A+120 ), giving you answer in the simplest radical form.
Let A be an angle such that tan(A)=1/2. Find the value of tan(A+120°), giving you answer in the simplest radical form.
Guest
Oct 10, 2021
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289
1
Answer pls
https://cdn.kastatic.org/ka-perseus-graphie/43b37c4cece089e8439878fb55414ea53cc502da.png
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Guest
Oct 10, 2021
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379
2
suppose sin(a)+cos(b)=-0.2 while sin(b)+cos(a)=1.6
suppose sin(a)+cos(b)=-0.2 while sin(b)+cos(a)=1.6
What is the value ofsin (a+b)
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Guest
Oct 10, 2021
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381
1
Range
What is the range of the function f(x) = 2x^2 - 4x + 9? Plz help!
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Guest
Oct 10, 2021
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419
1
please answer question
The operation $\dagger$ is defined as $\frac{m}{n}\dagger\frac{p}{q} = (m)(p)(\frac{q}{n}).$ What is the simplified value of $\frac{7}{12}\dagger\frac{8}{3}$?
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Guest
Oct 10, 2021
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372
2
help function
A function is defined as f(x) = x^2 - 3x + 4. What expression can be used to describe f(2x + 1)? Express your answer in simplified form in terms of x.
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Guest
Oct 10, 2021
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195
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Counting
April has four different basil plants and four different tomato plants. In how many ways can she arrange the plants in a row if at least two of the tomato plants must be next to each other?
Guest
Oct 10, 2021
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212
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help Number theory
Some positive integers have exactly four positive factors. For example, 35 has only 1, 5, 7 and 35 as its factors. What is the sum of the smallest two positive integers that each have exactly four positive factors?
Guest
Oct 10, 2021
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221
0
Probability
n fair 6-sided dice are simultaneously rolled. The probability that exactly two of them show a number other than 1 is $25/72$. Find n.
Guest
Oct 10, 2021
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1
413
5
please help asap!
prove that if x ≥ 0, then 1+x ≥ 2√x
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Guest
Oct 10, 2021
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500
1
y = C1e^−3x + C2e^−2x + C3e^−x
y = C1e^−3x + C2e^−2x + C3e^−x
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Guest
Oct 10, 2021
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236
1
Number Theory
The proper divisors of 12 are 1, 2, 3, 4 and 6. A proper divisor of an integer $N$ is a positive divisor of $N$ that is less than $N$. What is the sum of the proper divisors of the sum of the proper divisors of $288$?
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Guest
Oct 10, 2021
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337
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Number Theory
What is the sum of the final three digits of the integer representation of $5^{12}$?
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Guest
Oct 10, 2021
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203
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Functions
Suppose that $f(x)$ and $g(x)$ are functions on $\mathbb{R}$ such that the range of $f$ is $[-5,3]$, and the range of $g$ is $[-2,2]$. The range of $f(x) \cdot g(x)$ is $[a,b]$. What is the largest possible value of $b$?
Guest
Oct 10, 2021
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319
1
help probability
A point P is randomly selected from the square region with vertices at $(\pm 2, \pm 2)$. What is the probability that is within one unit of (2,2)? Express your answer as a common fraction in terms of pi.
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Guest
Oct 10, 2021
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213
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math problem
Given that x, 2/x, y, 2/y, z, and 2/z are all integers, how many distinct values of x + y + z are possible?
Guest
Oct 10, 2021
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212
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A 10-H inductor, a 40@mF capacitor, and a voltage supply whose voltage is given by 100 sin 50t are connected in series in an electric circ
A 10-H inductor, a 40@mF capacitor, and a voltage supply whose
voltage is given by 100 sin 50t are connected in series in an electric
circuit. Find the current as a function of the time if the initial charge
on the capacitor is
read more ..
Guest
Oct 10, 2021
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207
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Coordinates
The graph of (x - 3)^2 + (y - 5)^2 = 16 is reflected over the line y = 4. The new graph is the graph of the equation x^2 + Bx + y^2 + Dy + 4 = 0 for some constants B, D, and F. Find B + D + F.
Guest
Oct 10, 2021
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207
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help with geometry
A pentagon ABCDE is translated north by 40 units to pentagon A1B1C1D1E1. Pentagon A1B1C1D1E1 is then translated east by $60$ units to pentagon A2B2C2D2E2. We know the perimeter of pentagon ABCDE is 30 units. Find CC2.
Guest
Oct 10, 2021
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225
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math 7th grade
A local Chinese restaurant sells combination meals for $9.50 a piece. If the cost of an order is proportional to the number of meals ordered, how much is the delivery charge?
Guest
Oct 10, 2021
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