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drek231 [11]
3 years ago
14

there are 30 marked seals. In a survey, you count 58 seals, 16 of which were marked. About how many seals are in the area? Round

to the nearest whole number.
Mathematics
1 answer:
Rina8888 [55]3 years ago
6 0

Answer:

109 seals

Step-by-step explanation:

Let

x -----> approximate total seals in the area

we know that

In a survey, you count 58 seals, 16 of which were marked

Using proportion

Find out how many seals are in the area , if there are 30 marked seals

\frac{58}{16} =\frac{x}{30}\\\\x=58(30)/16\\\\x=108.75\ seals

Round to the nearest whole number

108.75\ seals=109\ seals

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Read and solve the following probems
Fed [463]
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<u><em></em></u>

<u><em>Thank you</em></u>

6 0
2 years ago
Read 2 more answers
Is the line through points p (3,-5) and Q(1,4)parallel to the line through points R( -1,1) and S (3,-3)
Anna [14]

Answer:

No

Step-by-step explanation:

To find out if the lines that go through the pairs of points are parallel, we must find the slope of each line. If the slopes are equivalent, then they are parallel. If not, then they are not parallel.

We can use the slope formula to find the slope between two points. The slope formula is:

m=\frac{y_2-y_1}{x_2-x_1}

where m is the slope between the points (x₁, y₁) and (x₂, y₂).

Lets first find the slope between points P and Q.

m=\frac{-5-4}{3-1}=\frac{-9}{2}=-4.5

So the slope between P and Q is -4.5.

Now lets find the slope between the points R and S.

m=\frac{-3-1}{3-(-1)}=\frac{-4}{4}=-1

So the slope between R and S is -1.

Since -4.5 does not equal -1, the lines are not parallel.

I hope you find my answer and explanation to be helpful. Happy studying.

3 0
4 years ago
what is the constant of proportionality (in miles per hour) based on the table? (can you please help me)
Nookie1986 [14]

Answer:

45 ( please label me brainliest)

Step-by-step explanation:

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pochemuha
In order to compute the markup, compute the percentage like this:
38.50\times0. 32=12,32
The markup is then $12,32.
The selling price is the sum of the cost and the markup:
38.50+12,32=50,82
3 0
4 years ago
The ratio of Maths and science books in a school library is 4:5. If the number of science books is 75, find the number of Maths
sveticcg [70]

Answer:

let ratio 4:5 be 4x& 5x

according to the question

5x=75

x=75/5=15

the number of Maths books=4x=4×5=20 is your answer

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