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Misha Larkins [42]

2 years ago

9

A lifeguard received 15

1 answer:

Anarel [89]2 years ago

7 0

Answer:

c

Step-by-step explanation:

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I need help with math

Keith_Richards [23]

$\frac{1}{5} + \frac{3}{4} \times \frac{3}{5} = \\$

$\frac{1}{5} + \frac{9}{20} = \\$

$\frac{4}{20} + \frac{9}{20} = \\$

$\frac{13}{20} \\$

4 0

2 years ago

Basile [38]

Step-by-step explanation:

<h3>Let the literate and illiterate people of Rashkundu Village be 4x and x respectively then </h3><h3>4x + x = 6550</h3><h3>5x = 6550</h3><h3>x = 6550 / 5</h3><h3>x = 1310</h3><h3 /><h3>Therefore </h3><h3>no. of literate people = 4 * 1310 = 5240</h3><h3 /><h3>no. of illiterate people = 1310 </h3><h3 /><h3>Hope it will help :)</h3>

8 0

3 years ago

Read 2 more answers

Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

<u>Brand A</u> <u>Brand B</u>

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

3 0

3 years ago

Write 9/4 as a decimal. Round to three decimal places

Greeley [361]

9/4 = 2 1/4

1/4 = 0.25

2.25 is your answer

hope this helps

7 0

2 years ago

BRAINLIEST ANSWER FOR FIRST Please help with the problem below

Sidana [21]

Answer:

$m\:$ ]

Step-by-step explanation:

The given inequality is ;

$\frac{2m+3}{2}-\frac{17}{4}\:$

Multiply through by 8 to clear the fraction;

$4(2m+3)-2(17)\:$

Expand;

$8m+12-34\:$

Group similar terms;

$8m-m\:$

$7m\:$

$m\:$

7 0

3 years ago

Read 2 more answers