Maths Exam

1. Expand the Brackets

1. Expand the brackets to simplify the following:$$ 2\left(-5e + 4Y\right) $$
Correct Answer
$$ -10e + 8Y $$
2. Expand the brackets to simplify the following:$$ -4\left(-6P + 4Q\right) $$
Correct Answer
$$ 24P - 16Q $$

2. Expand the Brackets

1. Expand the brackets to simplify the following:$$ {\left(3x + -6Q\right)}^{2} $$
Correct Answer
$$ 9{x}^{2} - 36xQ + 36{Q}^{2} $$
2. Expand the brackets to simplify the following:$$ {\left(-4c + (-A)\right)}^{2} $$
Correct Answer
$$ 16{c}^{2} + 8cA + {A}^{2} $$

3. Collect Like Terms

1. Collect like terms to simplify the following:$$ 4R + (-f) + 4k + 6f $$
Correct Answer
$$ 4R + 5f + 4k $$
2. Collect like terms to simplify the following:$$ -6R + 2f + -4Z + -4f $$
Correct Answer
$$ -6R + -2f - 4Z $$

4. Adding fractions

1. Simplify the following:$$ \frac{4x + 6}{-3x + -4} + \frac{-6x + 1}{-5x + 4} $$
Correct Answer
$$ \frac{-2{x}^{2} + 7x + 20}{15{x}^{2} + 8x - 16} $$
2. Simplify the following:$$ \frac{3x + 3}{-6x + 4} + \frac{-4x + -2}{2x + -6} $$
Correct Answer
$$ \frac{30{x}^{2} + -16x - 26}{-12{x}^{2} + 44x - 24} $$

5. Evaluate the following equations.

1. Find k to 3 significant figures in the following equation: $$ k = \frac{\sin\left(y\right)}{\sqrt{x}} - \sqrt{(-z)},$$ Given that x = 3.0, y = 2.0, z = -5.0
Correct Answer
-1.71
2. Find h to 3 significant figures in the following equation: $$ h = \frac{\left(x + y\right)\left(x + 5 + \ln\left(z\right)\right)}{z + 6},$$ Given that x = 4.0, y = -1.0, z = 2.0
Correct Answer
3.63

6. Rearrange the following equation.

1. Rearrange the following equation to get an expression for m: $$\frac{\sqrt{x} - \cos\left(z\right)}{\exp\left(-3y\right)} = \frac{\left(m + \exp\left(y\right)\right)\left(y + 6\right)}{\sqrt{z}},$$
Correct Answer
$$m = \frac{\frac{\sqrt{x} - \cos\left(z\right)}{\exp\left(-3y\right)}\sqrt{z}}{y + 6} - \exp\left(y\right)$$
2. Rearrange the following equation to get an expression for m: $$\left(\frac{y}{x} + \exp\left(z\right)\right)\sin\left(5z\right) = \left(3 + m - 3z\right)\left(\exp\left(y\right) - \sqrt{x}\right),$$
Correct Answer
$$m = \frac{\left(\frac{y}{x} + \exp\left(z\right)\right)\sin\left(5z\right)}{\exp\left(y\right) - \sqrt{x}} + 3z - 3$$

7. Quadratic Equation

Solve the following equation to get a value for x:$$2{x}^{2} + 5x + 3 = 0$$
Correct Answer
$$-1$$ and $$\frac{-3}{2}$$

8. Expand the Brackets

1. Expand the brackets to simplify the following:$$ 3\left((-c) + -2Y\right) $$
Correct Answer
$$ -3c - 6Y $$
2. Expand the brackets to simplify the following:$$ -6\left(-5X + 6h\right) $$
Correct Answer
$$ 30X - 36h $$

9. Expand the Brackets

1. Expand the brackets to simplify the following:$$ {\left(-5X + -2A\right)}^{2} $$
Correct Answer
$$ 25{X}^{2} + 20XA + 4{A}^{2} $$
2. Expand the brackets to simplify the following:$$ {\left(-4x + -4Y\right)}^{2} $$
Correct Answer
$$ 16{x}^{2} + 32xY + 16{Y}^{2} $$

10. Collect Like Terms

1. Collect like terms to simplify the following:$$ 2x + -4b + -6Z + 5b $$
Correct Answer
$$ 2x + b - 6Z $$
2. Collect like terms to simplify the following:$$ 6R + (-h) + 2v + 6h $$
Correct Answer
$$ 6R + 5h + 2v $$


Other Articles:

Quantum Mechanics for programmers

A quick demo showing how to make simulations of simple quantum mechanics systems in javascript.

Physics Algorithms Book

This is a work in progress to write a book on physics algorithms. At the moment, it is about 1/3 finished though, but the latest version can be downloaded for free.

Chernobyl Simulation

An attempt to simulate the normal running, and then accident of the Chernobyl nuclear reactor.




© Hugo2015. Session @sessionNumber