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3 years ago

What’s the answer to this question

Mathematics

1 answer:

rodikova [14]3 years ago

7 0

Answer:

the answer is on the far left.

Step-by-step explanation:

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3. In a certain school, there are 456 girls. Calculate the total number of students

marin [14]

Answer:

3) girls = 24% = 456

let the total number of students be = x

$\frac{24}{100} \times x = 456$

$x = 456 \times \frac{100}{4}$

$x = 1900$

the total number of students is 1900

4) increase = 20%

new salary = 24000 rupees

let his original salary be = y

$\frac{20}{100} \times y = 24000 - y$

$0.2y = 24000 - y$

$0.2y + y = 24000$

$1.2y = 24000$

$y = \frac{24000}{1.2}$

$y = 20000$

his original salary is 20,000 rupees

7 0

3 years ago

An independent-measures research study with n = 5 participants in each treatment produces sample variances of 8 and 10, and a 2-

Crazy boy [7]

Cohen's d is given by:

$Cohen's\ d= \frac{mean\ difference}{ \sqrt{ \frac{(n_1-1)s_1^2+(n_2-1)s_2^2}{n_1+n_2-2} } } \\ \\ = \frac{2}{\sqrt{\frac{(5-1)8+(5-1)10}{5+5-2}}} = \frac{2}{ \sqrt{ \frac{32+40}{8} } } = \frac{2}{ \sqrt{9} } \\ \\ =\frac{2}{3}$

7 0

4 years ago

Please help me with this math

fredd [130]

The part D is the correct one...

8 0

3 years ago

What does algebra mean in math

Ghella [55]

Algebra is solving for the unknown so
if you have 10 apples and you give 5 to your friend, how many apples would you have so that is also 10-5=x solve for x

or it could be more complicated like (x-2)/6+4x-3=17

5 0

3 years ago

Read 2 more answers

Help me please, i really don't understand!!

Nat2105 [25]

Answer:

x plus 4 divided by 5 minus 9

x + 4 / 5 - 9

4 0

3 years ago

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