Maths Exam

1. Expand the Brackets

1. Expand the brackets to simplify the following:$$ 4\left(2g + 2Y\right) $$
Correct Answer
$$ 8g + 8Y $$
2. Expand the brackets to simplify the following:$$ -4\left(5a + 3Y\right) $$
Correct Answer
$$ -20a - 12Y $$

2. Expand the Brackets

1. Expand the brackets to simplify the following:$$ {\left(1B + -4j\right)}^{2} $$
Correct Answer
$$ {B}^{2} - 8Bj + 16{j}^{2} $$
2. Expand the brackets to simplify the following:$$ {\left(-6x + 5Y\right)}^{2} $$
Correct Answer
$$ 36{x}^{2} - 60xY + 25{Y}^{2} $$

3. Collect Like Terms

1. Collect like terms to simplify the following:$$ 2i + 5j + 3k + 6j $$
Correct Answer
$$ 2i + 11j + 3k $$
2. Collect like terms to simplify the following:$$ 5a + 6y + 6n + 4y $$
Correct Answer
$$ 5a + 10y + 6n $$

4. Adding fractions

1. Simplify the following:$$ \frac{-2x + -5}{-5x + 3} + \frac{-5x + -4}{6x + 6} $$
Correct Answer
$$ \frac{13{x}^{2} + -37x - 42}{-30{x}^{2} - 12x + 18} $$
2. Simplify the following:$$ \frac{-5x + 5}{4x + 4} + \frac{-6x + -6}{-3x + -6} $$
Correct Answer
$$ \frac{-9{x}^{2} + -33x - 54}{-12{x}^{2} - 36x - 24} $$

5. Evaluate the following equations.

1. Find V to 3 significant figures in the following equation: $$ V = \left(x + 3 + \sqrt{y}\right)\exp\left(\sqrt{z}\right),$$ Given that x = -1.0, y = 2.0, z = 3.0
Correct Answer
19.3
2. Find B to 3 significant figures in the following equation: $$ B = \frac{\exp\left(x\right)\left(6 + z\right)}{2\exp\left(z\right)y},$$ Given that x = 4.0, y = 5.0, z = -6.0
Correct Answer
0.0

6. Rearrange the following equation.

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

7. Quadratic Equation

Solve the following equation to get a value for x:$$1{x}^{2} + -6x = -6$$
Correct Answer
$$\frac{6 + \sqrt{12}}{2}$$ and $$\frac{6 - \sqrt{12}}{2}$$

8. Expand the Brackets

1. Expand the brackets to simplify the following:$$ 3\left(-6B + 4y\right) $$
Correct Answer
$$ -18B + 12y $$
2. Expand the brackets to simplify the following:$$ 5\left(-4a + 3d\right) $$
Correct Answer
$$ -20a + 15d $$

9. Expand the Brackets

1. Expand the brackets to simplify the following:$$ {\left(-4c + -6b\right)}^{2} $$
Correct Answer
$$ 16{c}^{2} + 48cb + 36{b}^{2} $$
2. Expand the brackets to simplify the following:$$ {\left(-4c + -4y\right)}^{2} $$
Correct Answer
$$ 16{c}^{2} + 32cy + 16{y}^{2} $$

10. Collect Like Terms

1. Collect like terms to simplify the following:$$ 2a + 3b + -6m + -6b $$
Correct Answer
$$ 2a + -3b - 6m $$
2. Collect like terms to simplify the following:$$ -6a + 4f + 5k + 2f $$
Correct Answer
$$ -6a + 6f + 5k $$


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