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All Questions
+0
232716 Questions
0
244
0
counting
From a group of 7 men and 6 women 5 persons are to be selected to form a committee so that at least 3 men are in a committee. In how many ways can this be done.
Guest
Feb 21, 2021
0
278
0
10 adults and 5 children can watch a movie for 125 dollars
10 adults and 5 children can watch a movie for 125 dollars. But 8 adults and 10 children can watch the movie for 130 dollars. How much would it cost for 6 adults and 10 children to watch the movie?
Guest
Feb 21, 2021
0
292
1
PLS HELPPPPP
A mathematician works for t hours per day and solves p problems per hour, where t and p are positive integers and 1
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Guest
Feb 21, 2021
0
633
1
Help!
One hundred families each have 2 fish. Each fish has either one stripe or two stripes. In total, there are 273 stripes. How many one-striped fish are there in total?
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Guest
Feb 21, 2021
0
359
1
+1679
complex numbers
Simplify $-3(1+4i)+i(-2+i)$.
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wiseowl
Feb 21, 2021
0
900
1
Help!!!!! If $x^2+y^2=1$, what is the largest possible value of $|x|+|y|$?
If $x^2+y^2=1$, what is the largest possible value of $|x|+|y|$? Thanks!
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Guest
Feb 21, 2021
0
312
0
+1679
domain
How many real numbers are not in the domain of the function $$f(x) = \frac{1}{x+64} + \frac{1}{x^2+64} + \frac{1}{x^3+64}~?$$
wiseowl
Feb 21, 2021
0
308
0
+1679
domain
Suppose a function $f(x)$ is defined on the domain $[-8,4]$. If we define a new function $g(x)$ by $$g(x) = f(-2/x),$$ then what is the domain of $g(x)$? Express your answer in interval notation.
wiseowl
Feb 21, 2021
0
353
1
+1679
absolute value
Find the largest value of $x$ that satisfies the equation $|x+5|=12$.
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wiseowl
Feb 21, 2021
0
361
1
+1679
absolute value
What is the value of $x$ if $|x-1|=|x+2|$?
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wiseowl
Feb 21, 2021
-1
350
1
+205
Rational Expressions of Polynomials
Find the sum of all $x$ that satisfies the equation $\frac{-9x}{x^2-1} = \frac{2x}{x+1} - \frac{6}{x-1}.$
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oliviapow06
Feb 21, 2021
0
409
1
+1679
floor function
The greatest integer function of $x$ is expressed as $[x]$ and is defined to be the greatest integer less than or equal to $x$. Find $[\pi + 4]$
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wiseowl
Feb 21, 2021
0
416
1
+1679
domain
What is the domain of the function $$u(x) = \frac{1}{\sqrt[3]{x}}~?$$ Express your answer in interval notation.
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wiseowl
Feb 21, 2021
+1
336
1
+501
Piecewise-Defined Functions
If
\[f(x) =
\begin{cases}
x^2-4 &\quad \text{if } x \ge -4, \\
x + 3 &\quad \text{otherwise},
\end{cases} <#> \]
then for how many values of $x$ is $f(f(x)) = 5$?
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ellapow
Feb 21, 2021
+1
345
1
+501
Rational Expressions of Polynomials
If $f(x)=\frac{x+4}{x^2+ax+b}$, and $f(x)$ has two vertical asymptotes at $x=1$ and $x=-2$, find the sum of $a$ and $b$.
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ellapow
Feb 21, 2021
0
365
1
+1679
complex number
Evaluate $i^{11} + i^{16} + i^{21} + i^{28} + i^{31}$.
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wiseowl
Feb 21, 2021
0
386
1
+1679
floor
What is the greatest integer less than $\frac{15}4$?
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wiseowl
Feb 21, 2021
0
365
1
+1679
domain
What is the domain of the function $$\ell(y) = \frac{1}{(y-2)+(y+8)}~?$$ Express your answer in interval notation.
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wiseowl
Feb 21, 2021
0
379
1
+147
Graphing Functions
Suppose the function $f(x)$ is defined on the domain $\{x_1,x_2,x_3\}$, so that the graph of $y=f(x)$ consists of just three points. Suppose those three points form a triangle of area $32$.
The graph of $y = 2f(2x)$ also
read more ..
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powclaire
Feb 21, 2021
0
304
0
+1679
floor function
Find the value of $x$ if $x$ is positive and $x\cdot\lfloor x\rfloor=78$. Express your answer as a decimal.
wiseowl
Feb 21, 2021
0
407
1
+1679
domain
What is the domain of the function $$f(x) = \frac{(2x-3)(2x+5)}{(3x-9)(3x+8)}~?$$ Express your answer as an interval or as a union of intervals.
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wiseowl
Feb 21, 2021
0
383
1
+1679
complex numbers
Simplify $\dfrac{5+12i}{2-8i}$. Your answer should be of the form $a+bi$, where $a$ and $b$ are both real numbers and written as improper fractions (if necessary).
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wiseowl
Feb 21, 2021
0
329
0
+1679
quadratic formula
If the function $j(x)$ is defined only on domain $[-1,2]$, and is defined on this domain by the formula $$j(x) = 2x^2+7,$$ then what is the range of $j(x)$? Express your answer as an interval or as a union of intervals.
wiseowl
Feb 21, 2021
0
375
1
+1679
complex numbers
What is $a-2b$, where $a=4-2i$ and $b=3+4i$?
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wiseowl
Feb 21, 2021
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