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sergij07 [2.7K]
4 years ago
8

A coral reef grows 0.19m every week. How much does it grow in 6 weeks? Write your answer in millimeters.

Mathematics
2 answers:
kondaur [170]4 years ago
6 0

0.19 \times 6 = 1.14
The answer is 1.14 millimeters
xenn [34]4 years ago
4 0
1140 millimeters
0.19 times 6 is 1.14 and there is a thousand millimeters in one meter so multiply 1.14 by a thousand to get 1140.
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Answer:

A) -56

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B) First, you have to ignore the plus sign, and recognize that the second negative number means you are subtracting that number.

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4 years ago
In a class of P students, the average of test scores is 70. In another class the average test scores is 92. When scores of the t
Basile [38]

So, since averages are defined as:

\frac{\sum_{k=1}^{P} P_k}{P}=70

So, since P are the total number of elements and P_k is the P_kth student. This is saying if we sum over each student's score and divide it by the number of students, we should get P, which is true.

So, using that logic, the other class can be represented as:

\frac{\sum_{k=1}^{N} N_k}{N}=70

We can take both of these equations and multiply them by N:

\sum_{k=1}^{P} P_k=70P

\sum_{k=1}^N N_k=92N

So, if we want to find the average of this we should add both our equations then divide by P+N, which is the number of all the students.

\frac{\sum_{k=1}^{P} P_k+\sum_{k=1}^{N}N_k}{N+P}=\frac{70P+92N}{N+P}

To make this simpler we can replace our LHS with 86, since that's the average of both classes combined.

86=\frac{92N+70P}{N+P} \implies\\ 86N+86P=92N+70P \implies \\ 16P=6N \implies \\ \frac{16P}{N}=6 \implies \\ \frac{P}{N}=\frac{6}{16}

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7 0
4 years ago
The ordered pairs (1.3) and (3.7) lie on the line the slope of that line is
murzikaleks [220]

Answer:

Slope is 2.

Step-by-step explanation:

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4 0
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