Maths Exam

1. Expand the Brackets

1. Expand the brackets to simplify the following:$$ -4\left(2P + 2Y\right) $$
Correct Answer
$$ -8P - 8Y $$
2. Expand the brackets to simplify the following:$$ 2\left(4X + 6y\right) $$
Correct Answer
$$ 8X + 12y $$

2. Expand the Brackets

1. Expand the brackets to simplify the following:$$ {\left((-P) + -3h\right)}^{2} $$
Correct Answer
$$ {P}^{2} + 6Ph + 9{h}^{2} $$
2. Expand the brackets to simplify the following:$$ {\left(3a + 6j\right)}^{2} $$
Correct Answer
$$ 9{a}^{2} + 36aj + 36{j}^{2} $$

3. Collect Like Terms

1. Collect like terms to simplify the following:$$ 3P + 5f + 4Z + -6f $$
Correct Answer
$$ 3P + (-f) + 4Z $$
2. Collect like terms to simplify the following:$$ -3R + -6j + -2k + 2j $$
Correct Answer
$$ -3R + -4j - 2k $$

4. Adding fractions

1. Simplify the following:$$ \frac{2x + -2}{-5x + 2} + \frac{3x + -1}{4x + 4} $$
Correct Answer
$$ \frac{-7{x}^{2} + 11x - 10}{-20{x}^{2} - 12x + 8} $$
2. Simplify the following:$$ \frac{5x + 6}{6x + -6} + \frac{-2x + 4}{5x + -4} $$
Correct Answer
$$ \frac{13{x}^{2} + 46x - 48}{30{x}^{2} - 54x + 24} $$

5. Evaluate the following equations.

1. Find B to 3 significant figures in the following equation: $$ B = \frac{{2}^{z}\exp\left(y\right)}{{5}^{z}\sqrt{x}},$$ Given that x = 2.0, y = 3.0, z = 6.0
Correct Answer
0.0582
2. Find h to 3 significant figures in the following equation: $$ h = \exp\left(x + y\right) + \sin\left(\frac{z}{4}\right),$$ Given that x = -1.0, y = -1.0, z = -1.0
Correct Answer
-0.112

6. Rearrange the following equation.

1. Rearrange the following equation to get an expression for m: $$2y + \left(4 + x\right)\cos\left(z\right) = \frac{(-m\sqrt{x})}{2\sin\left(\cos\left(z\right)\right)},$$
Correct Answer
$$m = \frac{\frac{\left(2y + \left(4 + x\right)\cos\left(z\right)\right)2\sin\left(\cos\left(z\right)\right)}{-1}}{\sqrt{x}}$$
2. Rearrange the following equation to get an expression for m: $$\left(x - z + yz\right)\ln\left(\sin\left(y\right)\right) = \frac{zm}{x} - \left(3 - x\right)\exp\left(z\right),$$
Correct Answer
$$m = \frac{\left(\left(x - z + yz\right)\ln\left(\sin\left(y\right)\right) + \left(3 - x\right)\exp\left(z\right)\right)x}{z}$$

7. Quadratic Equation

Solve the following equation to get a value for x:$$-3{x}^{2} + 5x + 3 = 0$$
Correct Answer
$$\frac{(-\left(\sqrt{61} - 5\right))}{6}$$ and $$\frac{(-\left(-5 - \sqrt{61}\right))}{6}$$

8. Expand the Brackets

1. Expand the brackets to simplify the following:$$ -6\left(6i + (-Q)\right) $$
Correct Answer
$$ -36i + 6Q $$
2. Expand the brackets to simplify the following:$$ 4\left(-3g + 3y\right) $$
Correct Answer
$$ -12g + 12y $$

9. 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:$$ {\left(-3P + 4b\right)}^{2} $$
Correct Answer
$$ 9{P}^{2} - 24Pb + 16{b}^{2} $$

10. Collect Like Terms

1. Collect like terms to simplify the following:$$ (-R) + 5Y + 6z + 2Y $$
Correct Answer
$$ (-R) + 7Y + 6z $$
2. Collect like terms to simplify the following:$$ -3x + -5S + 4n + -3S $$
Correct Answer
$$ -3x + -8S + 4n $$


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