Maths Exam

1. Express the following ratios in their simplest forms:

1. Ratio 6 : 12
Correct Answer
1:2
2. Ratio: $$\frac{4}{3} : \frac{2}{4}$$
Correct Answer
8:3
3. Ratio 0.560 : 0.240
Correct Answer
7:3

2. Write the following as percentages

1. Number: 0.46
Correct Answer
46 %
2. Number: $$\frac{2}{7}$$
Correct Answer
28.6 %
3. Number: 1.1
Correct Answer
110 %

3. Write the following as a fraction

$$ 28.57 \%$$
Correct Answer
$$\frac{2}{7}$$

4. Logs

Solve the following for x: $$\ln\left({\left((-2)x\right)}^{3}\right) + \ln\left({\left((-3)x\right)}^{-1}\right) = \ln\left(x\right) + 2$$
Correct Answer
$$ x = \frac{3\exp\left(2\right)}{8} $$

5. Powers

1. Please simplify the following expression: $$ {x}^{3}{x}^{5} $$
Correct Answer
$${x}^{8} $$
2. Please simplify the following expression: $$ {x}^{\frac{6}{4}}{x}^{\frac{-3}{4}} $$
Correct Answer
$${x}^{\frac{3}{2}}{x}^{\frac{-3}{4}} $$
3. Please simplify the following expression: $$ {\left({x}^{-4}\right)}^{-3} $$
Correct Answer
$$ {x}^{12} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{5}\right)}^{-1}{y}^{1}}{{y}^{-2}} $$
Correct Answer
$$ \frac{{y}^{3}}{{x}^{5}} $$

6. Express the following ratios in their simplest forms:

1. Ratio 1.12 : 0.240
Correct Answer
14:3
2. Ratio: $$\frac{10}{9} : \frac{4}{2}$$
Correct Answer
5:9
3. Ratio 3.30 : 16.5
Correct Answer
1:5

7. Write the following as percentages

1. Number: 0.80
Correct Answer
80 %
2. Number: $$\frac{7}{2}$$
Correct Answer
350 %
3. Number: 1.4
Correct Answer
140 %

8. Write the following as a fraction

$$ 40.00 \%$$
Correct Answer
$$\frac{2}{5}$$

9. Logs

Solve the following for x: $$\ln\left({\left(2x\right)}^{-6}\right) + \ln\left({x}^{-4}\right) = \ln\left(x\right) + -6$$
Correct Answer
$$ x = {\left(64\exp\left(-6\right)\right)}^{\frac{-1}{11}} $$

10. Powers

1. Please simplify the following expression: $$ {x}^{-2}{x}^{2} $$
Correct Answer
$$1 $$
2. Please simplify the following expression: $$ {x}^{\frac{-5}{-2}}{x}^{\frac{1}{-2}} $$
Correct Answer
$${x}^{\frac{5}{2}}{x}^{\frac{-1}{2}} $$
3. Please simplify the following expression: $$ {\left({x}^{-5}\right)}^{-3} $$
Correct Answer
$$ {x}^{15} $$
4. Please simplify the following expression: $$ \frac{{\left({x}^{-4}\right)}^{2}{y}^{3}}{{y}^{-4}} $$
Correct Answer
$$ \frac{{y}^{7}}{{x}^{8}} $$


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