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All Questions
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152667 Questions
0
82
7
Vectors and matrices
What shall I know before starting vectors and matrices? (Idk calculus but I know trigonometry)
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Guest
Jun 16, 2019
+1
91
1
+50
please help
An ant starts walking from the origin. During each second, it has an equal chance of moving 1 inch right, 2 inches up, 3 inches left, or 4 inches down. What is the ant's expected location after 5 seconds if it starts at the origin?
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Oofrence
Jun 16, 2019
Jun 15, 2019
+1
104
4
help
The lengths of two sides of a triangle are 33 units and 42 units. The third side also has an integral length. What is the least possible number of units in the perimeter of the triangle?
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Guest
Jun 15, 2019
0
98
3
Help please
1. If $f(x) = x^2 - 1$ and $g(x) = x + 7,$ evaluate $f(g(7)) + g(f(3)).$
2. Suppose $f(x)=\frac{3}{2-x}$. If $g(x)=\frac{1}{f^{-1}(x)}+9$, find $g(3)$.
3. For what value of does the equation represent
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Guest
Jun 15, 2019
0
115
3
Also with this one please
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Guest
Jun 15, 2019
-1
117
4
Please help! Do not know hot to solve
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Guest
Jun 15, 2019
+1
107
8
Interesting property
I was thinking about this interesting property of positive integers, where if a, b, are positive integers, and a>b, then the remainder when a and b are divided by a-b seems to always the same. Is this true for all positive integers? I can't seem
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Guest
Jun 15, 2019
+1
103
1
+21
Help
Let $r$ and $s$ be the roots of $y^2 - 19y + 7$. Find $(r-2)(s-2)$.
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Sjsjjs
Jun 15, 2019
0
120
2
+21
Help
What is the sum of the squares of the roots of $18x^2 +21x - 400$?
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Sjsjjs
Jun 15, 2019
0
77
1
+21
Help!
Rationalize the denominator of $\frac{3}{2\sqrt[3]{5}}$. The answer can be written in the form of $\frac{A\sqrt[3]{B}}{C}$, where $A$, $B$, and $C$ are integers, $C$ is positive, and $B$ is not divisible by the cube of any prime. Find $A+B+C$.
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Sjsjjs
Jun 15, 2019
0
75
1
+21
Help?
Given that $3x + y = 10$ and $x + 3y = 14$, find $10x^2 + 12xy + 10y^2$.
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Sjsjjs
Jun 15, 2019
0
86
1
+21
Help
If $(x + y)^2 = 105$ and $x^2 + y^2 = 65$, what is the value of $xy$?
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Sjsjjs
Jun 15, 2019
+1
98
9
Help
Rationalize the denominator of (sqrt(5)+sqrt(2))/(sqrt(5)-sqrt(2)). The answer can be written as (A+Bsqrt(C))/D, where A, B, C, and D are integers. D is positive and C is not divisible by the square of any prime. If the greatest common divisor of A, B,
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Guest
Jun 15, 2019
+1
109
3
+782
Simplifying Trig
The expression is (in degrees.)
I got 0, with the following strategy
using product identities and then
But when I plug it in a calculator it shows up as .
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CoolStuffYT
Jun 15, 2019
+1
105
2
Calculating the time it takes to heat up alcohol.
I hope it's alright if I post this here, seeing as this site seems to be mainly for math problems, but I've been struggling with this problem and this topic for a while now and I'm eager to know how to solve it so I can apply it to assignments that are
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off-topic
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Guest
Jun 15, 2019
0
93
3
+178
Help!
There are 1200 trees in an apple orchard. The owner randomly examined 20 trees and found 3 of them are infested. What is the expected number of infested trees in the orchard?
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Rudram592
Jun 15, 2019
-2
125
9
+208
?????
What is the difference bewteen linear and not linear?
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NoobGuest
Jun 15, 2019
+1
100
6
22*arcsin 45
22*arcsin 45
hectictar
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Guest
Jun 15, 2019
-2
116
4
+208
Hi can you pls help?
Among all fractions that have a positive integer numerator and denominator and satisfy
which fraction has the smallest denominator?
I know this is on the website already but it didn't help.
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NoobGuest
Jun 15, 2019
0
76
5
What should I know before starting quadratics?
Hi, so i was wondering what shall I know /recommended to understand before trying to understand quadratics?
I already know Factorization, functions , trigonometry.
off-topic
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Guest
Jun 15, 2019
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