2 years ago

Which ratio forms a proportion with 5: 15? A: 10:20 B: 75:5 C: 3:1 D: 1:3

Mathematics

1 answer:

Lerok [7]2 years ago

4 0

Answer:

Step-by-step explanation:

5/5 : 15/5

gives

1:3

......

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Write an equivalent expression for (2m+3)(m-1).

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You can do the box method, multiply them. Then combine like terms.
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3 years ago

What are the steps to this equation

Harlamova29_29 [7]

Answer:

$x=7$

Step-by-step explanation:

$\frac{2}{5}x+\frac{1}{3}=\frac{1}{3}x+\frac{4}{5}$

Subtract $\frac{1}{3}$ from both sides:

$\frac{2}{5}x+\frac{1}{3}-\frac{1}{3}=\frac{1}{3}x+\frac{4}{5}-\frac{1}{3}$

$\frac{2}{5} x=\frac{1}{3}x+\frac{12}{15}-\frac{5}{15}$

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Subtract $\frac{1}{3} x$ from both sides:

$\frac{2}{5}x-\frac{1}{3}x=\frac{1}{3}x+\frac{7}{15}-\frac{1}{3}x$

$\frac{6}{15}x-\frac{5}{15}x=\frac{7}{15}$

$\frac{1}{15}x=\frac{7}{15}$

Multiply both sides by 15:

$15\times \frac{1}{15}x=\frac{7\times 15}{15}$

$x=\frac{105}{15}$

$x=7$

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The IQ test is designed such that the scores on it are normally distributed with a mean of 100 and a standard deviation of 15. I

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Step-by-step explanation:

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