Maths Exam

1. Express the following ratios in their simplest forms:

1. Ratio 44.0 : 17.6
Correct Answer
5:2
2. Ratio: $$\frac{3}{7} : \frac{6}{10}$$
Correct Answer
5:7
3. Ratio 0.140 : 1.05
Correct Answer
2:15

2. Write the following as percentages

1. Number: 0.63
Correct Answer
63 %
2. Number: $$\frac{7}{2}$$
Correct Answer
350 %
3. Number: 2.0
Correct Answer
200 %

3. Write the following as a fraction

$$ 33.33 \%$$
Correct Answer
$$\frac{1}{3}$$

4. Logs

Solve the following for x: $$-6\ln\left(3x\right) + -3\ln\left(2x\right) = \ln\left(x\right) + -4$$
Correct Answer
$$ x = {\left(5832\exp\left(-4\right)\right)}^{\frac{-1}{10}} $$

5. Powers

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

6. Express the following ratios in their simplest forms:

1. Ratio 0.300 : 0.420
Correct Answer
5:7
2. Ratio: $$\frac{10}{5} : \frac{10}{11}$$
Correct Answer
11:5
3. Ratio 42 : 18
Correct Answer
7:3

7. Write the following as percentages

1. Number: 0.40
Correct Answer
40 %
2. Number: $$\frac{5}{2}$$
Correct Answer
250 %
3. Number: 1.5
Correct Answer
150 %

8. Write the following as a fraction

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

9. Logs

Solve the following for x: $$-4\ln\left(5x\right) + \ln\left({\left(2x\right)}^{6}\right) = \ln\left(x\right) + 5$$
Correct Answer
$$ x = \frac{625\exp\left(5\right)}{64} $$

10. Powers

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


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