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3 years ago

There are 15 people in the swimming club.

Mathematics

1 answer:

Burka [1]3 years ago

7 0

Answer:

6 girls, 9 boys

Step-by-step explanation:

Step 1:

2 : 3 15 people

Step 2:

2x + 3x = 15 people We can turn the ratio into variables

Step 3:

5x = 15 people We can now solve for the variable

Step 4:

x = 3 Now we know that the variable is 3

Step 5:

3 × 2 = 6 We can now solve for the number of girls

Step 6:

3 × 3 = 9 And we can also solve for the number of boys

Answer:

6 girls, 9 boys

Hope This Helps :)

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valkas [14]

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3 years ago

2k - 10 = 6<br><br> Can someone help me I can't figure out the answer

PSYCHO15rus [73]

Hello !

Okay so what you do is add 10 to the other side

2k - 10 +10 = 6 + 10

You would get ....

2k = 16

Next you divide 16 by 2 which is 8

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3 years ago

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The population of a community is known to increase at a rate proportional to the number of people present at time t. The initial

qaws [65]

Answer:

Step-by-step explanation:

Let P be the population of the community

So the population of a community increase at a rate proportional to the number of people present at a time

That is

$\frac{dp}{dt} \propto p\\\\\frac{dp}{dt} =kp\\\\ [k \texttt {is constant}]\\\\\frac{dp}{dt} -kp =0$

Solve this equation we get

$p(t)=p_0e^{kt}---(1)$

where p is the present population

p₀ is the initial population

If the initial population as doubled in 5 years

that is time t = 5 years

We get

$2p_o=p_oe^{5k}\\\\e^{5k}=2$

Apply In on both side to get

$Ine^{5k}=In2\\\\5k=In2\\\\k=\frac{In2}{5} \\\\\therefore k=\frac{In2}{5}$

Substitute $k=\frac{In2}{5}$ in $p(t)=p_oe^{kt}$ to get

$\large \boxed {p(t)=p_oe^{\frac{In2}{5}t }}$

Given that population of a community is 9000 at 3 years

substitute t = 3 in ${p(t)=p_oe^{\frac{In2}{5}t }}$

$p(3)=p_oe^{3 (\frac{In2}{5}) }\\\\9000=p_oe^{3 (\frac{In2}{5}) }\\\\p_o=\frac{9000}{e^{3(\frac{In2}{5} )}} \\\\=5937.8$

<h3>Therefore, the initial population is 5937.8</h3>

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3 years ago

150% of 150 is what number? (15 points I think?)

zysi [14]

225 percent

Step-by-step explanation:

150 is the whole and 150 divided by 150 is 1.

1 whole is 100 percent

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tensa zangetsu [6.8K]

Answer:

What are the answers?

Step-by-step explanation:

because the ratio is 25:1 aka 25 pages: 1 minute

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