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What is the probability that of 25 randomly selected students, no two share the same birthday?
1 answer 18 views
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Solve the equation \(4 x^{2}-8 x-3=0\)
1 answer 61 views
Solve the equation \(4 x^{2}-8 x-3=0\)Solve the equation \(4 x^{2}-8 x-3=0\) ...
by Pieter Gold Status
(31,957 points)
asked in Mathematics May 4
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Did climate change cause the dust bowl?
0 answers 39 views
Did climate change cause the dust bowl?Did climate change cause the dust bowl? ...
by MathsGee Platinum
(119,140 points)
asked in Geography & Environment Apr 23
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\(A, B, C\) and \(D\) are points on the circumference of a circle such that \(A B=B C\). \(A F\) is a tangent to the circle through \(A B C D\) at \(A\).

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\(A, B, C\) and \(D\) are points on the circumference of a circle such that \(A B=B C\). \(A F\) is a tangent to the circle through \(A B C D\) at \(A\).

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Solve \(8^{x}=\frac{2^{56}-4^{26}}{30}\)
1 answer 132 views
Solve \(8^{x}=\frac{2^{56}-4^{26}}{30}\)Solve \(8^{x}=\frac{2^{56}-4^{26}}{30}\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Mar 17
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What is \(12\dfrac{1}{3}\) percent as a fraction?
0 answers 89 views
What is \(12\dfrac{1}{3}\) percent as a fraction?What is \(12\dfrac{1}{3}\) percent as a fraction? ...
by Pieter Gold Status
(31,957 points)
asked in Mathematics Mar 8
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Apply your knowledge on ratio and share R25 between Thando and Sibi in the ratio 2:3
1 answer 93 views
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A cold drink is taken from a refrigerator and placed outside where the temperature is \(32^{\circ} \mathrm{C}\).
0 answers 46 views
A cold drink is taken from a refrigerator and placed outside where the temperature is \(32^{\circ} \mathrm{C}\).A cold drink is taken from a refrigerator and placed outside where the temperature is \(32^{\circ} \mathrm{C}\). After 25 minutes outside its temperat ...
by Pieter Gold Status
(31,957 points)
asked in Mathematics Feb 4
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A cup of coffee, cooling off in a room at temperature \(20^{\circ} \mathrm{C}\), has cooling constant \(k=0.09 \mathrm{~min}^{-1} .\)
0 answers 73 views
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The population of a bacteria culture grows at a rate that is proportional to the size of the population.
0 answers 70 views
The population of a bacteria culture grows at a rate that is proportional to the size of the population.The population of a bacteria culture grows at a rate that is proportional to the size of the population. (a) Let \(P\) denote the population of the c ...
by Pieter Gold Status
(31,957 points)
asked in Mathematics Feb 4
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A bacterial culture starts with 500 bacteria and after three hours there are 8000 . Assume that the culture grows at a rate proportional to its size.
0 answers 84 views
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The equation of position vs. time for a moving object, in SI units, is as \(x=-t^{2}+6 t-9 .\) Which of the following choices are correct?
1 answer 54 views
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Factorise \(10 x y^2+52 x y\)
0 answers 60 views
Factorise \(10 x y^2+52 x y\)Factorise \(10 x y^2+52 x y\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Jan 24
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Solve the equation \(4 y^{2}-12 y+9=0\)
0 answers 56 views
Solve the equation \(4 y^{2}-12 y+9=0\)Solve the equation \(4 y^{2}-12 y+9=0\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Jan 11
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Simplify \(\frac{1}{7} \times \frac{9}{16} \times \frac{16}{9} \times \frac{16}{9} \times \frac{9}{16}=\)
1 answer 132 views
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What is a line graph?
0 answers 48 views
What is a line graph?What is a line graph? ...
by MathsGee Platinum
(119,140 points)
asked in Physics & Chemistry Jan 3
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How many times does your heart beat in a year?
1 answer 115 views
How many times does your heart beat in a year?How many times does your heart beat in a year? ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Jan 3
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A bicycle is traveling at 15 miles per hour. How many feet will it cover in 20 seconds?
1 answer 104 views
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Use the factor theorem to show that \(x=-3\) is a solution to \(\mathrm{f}(x)=0\)
1 answer 82 views
Use the factor theorem to show that \(x=-3\) is a solution to \(\mathrm{f}(x)=0\)\ \mathrm{f}(x)=x^{3}+6 x^{2}+4 x-15 \ (a) Use the factor theorem to show that \(x=-3\) is a solution to \(\mathrm{f}(x)=0\) (b) Find the other so ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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Given that \((x-2)\) is a factor of \(\mathrm{f}(x)\) find the value of \(k\)
1 answer 90 views
Given that \((x-2)\) is a factor of \(\mathrm{f}(x)\) find the value of \(k\)\ \mathrm{f}(x)=x^{3}+k x-2 \ (a) Given that \((x-2)\) is a factor of \(\mathrm{f}(x)\) find the value of \(k\) (b) Solve the equation \(\mathrm{f ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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Use the factor theorem to show that \((x-2)\) is a factor of \(\mathrm{f}(x)\)
1 answer 82 views
Use the factor theorem to show that \((x-2)\) is a factor of \(\mathrm{f}(x)\)\ \mathrm{f}(x)=2 x^{3}-x^{2}-13 x+14 \ (a) Use the factor theorem to show that \((x-2)\) is a factor of \(\mathrm{f}(x)\) (b) Hence, or otherwise ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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Use the factor theorem to show that \((x+3)\) is a factor of \(\mathrm{g}(x)\)
1 answer 82 views
Use the factor theorem to show that \((x+3)\) is a factor of \(\mathrm{g}(x)\)\ \mathrm{g}(x)=4 x^{3}-8 x^{2}-35 x+75 \ (a) Use the factor theorem to show that \((x+3)\) is a factor of \(\mathrm{g}(x)\) (b) Hence show that \ ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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\[ \mathrm{f}(x)=2 x^{3}-7 x^{2}-17 x+10 \] Use the factor theorem and division to factorise \(\mathrm{f}(x)\) completely.
1 answer 83 views
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Find the value of \(x\) such that \[ \frac{1+x}{x}=\sqrt{5} \] Giving your answer in the form \(a+b \sqrt{5}\) where \(a\) and \(b\) are rational numbers.

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Factorise completely: \(75 x-12 x^{3}\)
1 answer 70 views
Factorise completely: \(75 x-12 x^{3}\)Factorise completely: \(75 x-12 x^{3}\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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Factorise completely: \(x-16 x^{3}\)
1 answer 73 views
Factorise completely: \(x-16 x^{3}\)Factorise completely: \(x-16 x^{3}\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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(a) Solve the equation: \(x^{2}-9 x+8=0\) (b) Hence solve the equation: \(y^{3}-9 y^{\frac{3}{2}}+8=0\)
1 answer 98 views
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Given \(y=2^{x}\) - Express \(4^{x}\) in terms of \(y\).
1 answer 89 views
Given \(y=2^{x}\) - Express \(4^{x}\) in terms of \(y\).Given \(y=2^{x}\) (a) Express \(4^{x}\) in terms of \(y\). (b) Hence, or otherwise, solve \(4^{x}-6\left(2^{x}\right)-16=0\) ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Nov 9, 2021
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Express \(8^{2 x-5}\) in the form \(2^{y}\), giving \(y\) in the form \(a x+b\), where \(a\) and \(b\) are constants.
1 answer 124 views
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Below is a diagram of a charged object (conductor) at electrostatic equilibrium. Points \(A, B\), and \(D\) are on the surface of the object, whereas point \(\mathrm{C}\) is located inside the object.

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An electric pole, 7 meters high, casts a shadow of 5 meters. Find the height of a tree that casts a shadow of 10 meters under similar conditions.
0 answers 148 views
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A map is drawn to a scale of 1:75000. This scale can be expressed as \(1cm\) respresents \(n \mathrm{~km}\). Find \(n\).
0 answers 135 views
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Express 80 as a product of primes.
0 answers 143 views
Express 80 as a product of primes.Express 80 as a product of primes. ...
by Student SIlver Status
(10,904 points)
asked in Mathematics Sep 27, 2021
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Show that \(\overrightarrow{P Q}\) is perpendicular to \(\overrightarrow{R S}\)
1 answer 91 views
Show that \(\overrightarrow{P Q}\) is perpendicular to \(\overrightarrow{R S}\)(a) Given that \(m=(6 i+8 j)\) and \(n=\left(-8 i+\frac{7}{3} j\right)\), find the : (i) magnitudes and direction of \(\mathrm{m}\) and \(\mathrm{n} ; ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Sep 12, 2021
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What number did she think of?
1 answer 81 views
What number did she think of?Boguslawa thinks of a number. She trebles the number. She then subtracts 8 . Boguslawa's answer is 16 . What number did she think of? ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Sep 10, 2021
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Convert the hexadecimal number $68 \mathrm{BE}$ to binary and then from binary convert it to octal.
1 answer 202 views
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A student travelled for $x$ hours at $5 \mathrm{~km} / \mathrm{hr}$ and for $\mathrm{y}$ hours at $10 \mathrm{~km} / \mathrm{hr}$.
1 answer 128 views
A student travelled for $x$ hours at $5 \mathrm{~km} / \mathrm{hr}$ and for $\mathrm{y}$ hours at $10 \mathrm{~km} / \mathrm{hr}$.A student travelled for $x$ hours at $5 \mathrm{~km} / \mathrm{hr}$ and for $\mathrm{y}$ hours at $10 \mathrm{~km} / \mathrm{hr}$. The journey was $35 ...
by Siyavula Bronze Status
(7,476 points)
asked in Mathematics Aug 15, 2021
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Suppose the position of an object at time $t$ is given by $f(t)=-49 t^{2} / 10+5 t+10 .$ Find a function giving the speed of the object at time $t .$
1 answer 273 views
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What is a linear equation?
1 answer 71 views
What is a linear equation?What is a linear equation? ...
by Maths Genie Bronze Status
(5,562 points)
asked in Mathematics Aug 9, 2021
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What is an argand diagram?
1 answer 98 views
What is an argand diagram?What is an argand diagram? ...
by MathsGee Platinum
(119,140 points)
asked in Mathematics Aug 8, 2021
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An average human body contains around $30,000,000,000,000$ red blood cells. Each cell measures approximately $0.000008 \mathrm{~m}$ long.
0 answers 158 views
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Given the function $f(x)=5 x^{2}+5 x-4$, calculate $f(-2)$
1 answer 131 views
Given the function $f(x)=5 x^{2}+5 x-4$, calculate $f(-2)$Given the function $f(x)=5 x^{2}+5 x-4$, calculate $f(-2)$ ...
by Edzai Zvobwo Bronze Status
(9,010 points)
asked in Mathematics Jul 24, 2021
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Given the function $f(x)=5 x^{2}-5 x+14$, calculate $f(5)$. $f(5)=$
1 answer 126 views
Given the function $f(x)=5 x^{2}-5 x+14$, calculate $f(5)$. $f(5)=$Given the function $f(x)=5 x^{2}-5 x+14$, calculate $f(5)$. $f(5)=$ ...
by Edzai Zvobwo Bronze Status
(9,010 points)
asked in Mathematics Jul 24, 2021
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