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All Questions
+0
236048 Questions
+1
19
0
+1938
Web2.0calc, what does the score mean?
I'm kinda new to this website, but I noticed one thing.
Next to CPhill or any username's name, I see this box with a number in it, and there's a heart next to that.
For example, CPhill has this 128485.
My
read more ..
NotThatSmart
Apr 29, 2024
0
13
1
+1839
Algebra
For certain values of k and m, the system
3a + 2b = 2
a + 2b = k - 8a - mb
has infinitely many solutions (a,b). What are k and m?
read more ..
NotThatSmart
●
ABJeIIy
Apr 29, 2024
0
29
0
+1839
Algebra
Simplify the expression
\frac{1}{\sqrt{36}} - \sqrt{27} - \frac{1}{\sqrt{27}} - \sqrt{18} + \frac{1}{\sqrt{18}} - \sqrt{9}
ABJeIIy
Apr 29, 2024
0
14
1
+1839
Algebra
Compute (1 + i)/(2 - i)(3 + i).
●
ABJeIIy
Apr 29, 2024
-1
38
0
+1839
Algebra
The function $f(x)$ is defined only on domain $[-1,2]$, and is defined on this domain by the formula
$$f(x) = 2x^2-8x+1.$$
What is the range of $f(x)$? Express your answer as an interval or as a union of intervals.
ABJeIIy
Apr 29, 2024
-1
21
0
+1839
Algebra
Let
$$f(x) = \frac{1}{1+\frac{2}{1+\frac 3x}}.$$
There are three real numbers $x$ that are not in the domain of $f(x)$. What is the sum of those three numbers?
ABJeIIy
Apr 29, 2024
-1
29
0
+1839
Algebra
Find the domain of the function $$f(x) = \frac{\sqrt{x}}{\sqrt{x^2}}.$$ Express your answer as an interval or as a union of intervals.
ABJeIIy
Apr 29, 2024
-1
26
0
+1839
Algebra
Let $f(x) = 3x - 8 + 4x^2$ and $g(x) = 15x + c - 3x^2$. Find $c$ if $(f \circ g)(x) = (g \circ f)(x)$ for all $x$.
ABJeIIy
Apr 29, 2024
-1
28
0
+1839
Algebra
Suppose $a(x) = 2x + 5 - 3x^2 + x^3$ and $b(x) = 4 - x^2 + 4x^4$. Find $(a\circ b)(3) - (b\circ a)(3).$
ABJeIIy
Apr 29, 2024
-1
29
0
+1839
Algebra
Let x and y be real numbers. If x and y satisfy x^2+y^2=4x+16y+15, then find the largest possible value of x. Give your answer in exact form using radicals, simplified as far as possible.
ABJeIIy
Apr 29, 2024
0
20
1
+1768
Counting
Find the number of ways of choosing three circles below, so that no two circles are next to each other.
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bader
Apr 29, 2024
0
14
0
+1768
help counting
Joanna has six beads that she wants to assemble into a bracelet. Four of the beads have the same color, and the other two all have different colors. In how many different ways can Joanna assemble her bracelet? (Two bracelets are considered identical
read more ..
bader
Apr 29, 2024
0
12
1
+1768
help counting
Franklin the fly starts at the point $(0,0)$ in the coordinate plane. At each point, Franklin takes a step to the right, left, up, or down. After $2$ steps, how many different points could Franklin end up at?
●
bader
Apr 29, 2024
0
12
1
+1839
Algebra
Let
f(x) = \sqrt{x}
Find the largest three-digit value of $x$ such that $f(x)$ is an integer.
●
ABJeIIy
Apr 29, 2024
-1
27
0
+1839
Algebra
Find the ordered quintuplet (a,b,c,d,e) that satisfies the system of equations
a+2b+3c+4d+5e=47
2a+3b+4c+5d=15
3a+4b+5c=34
read more ..
ABJeIIy
Apr 29, 2024
-1
21
0
+1839
Algebra
For a certain value of $k$, the system
x + y + 3z &= 10, \\
6x + 4y + z &= 18 - 5y - x, \\
kx + 7z &= 8 - 14y
has no solutions. What is this value of $k$?
ABJeIIy
Apr 29, 2024
-1
29
0
+1839
Algebra
Three runners, Dirk, Edith, and Foley all start at the same time for a $24$ km race, and each of them runs at a constant speed. When Dirk finishes the race, Edith is $10$ km behind, and Foley is $15$ km behind. When Edith finishes the race, how far
read more ..
ABJeIIy
Apr 29, 2024
-1
28
0
+1839
Algebra
Five workers have been hired to complete a job. If one additional worker is hired, they could complete the job $4$ days earlier. If the job needs to be completed $20$ days earlier, how many additional workers should be hired?
ABJeIIy
Apr 29, 2024
-1
24
0
+1839
Algebra
Find the largest value of x for which
x^2 + y^2 = 4x + 5y
has a solution, if x and y are real.
ABJeIIy
Apr 29, 2024
+1
27
1
+280
Algebra
Let Find the largest three-digit value of such that is an integer.
●
ABJelly
Apr 29, 2024
+1
18
1
+280
Algebra
Evaluate if .
●
ABJelly
Apr 29, 2024
+1
19
1
+280
Algebra
Let be a sequence. If for all and then find
●
ABJelly
Apr 29, 2024
+1
14
1
+280
Algebra
Find the ordered quintuplet $(a,b,c,d,e)$ that satisfies the system of equations
●
ABJelly
Apr 29, 2024
+1
14
1
+280
Algebra
Find the value of
●
ABJelly
Apr 29, 2024
+1
19
1
+280
Algebra
Compute the sum
●
ABJelly
Apr 29, 2024
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