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Jobisdone [24]
4 years ago
12

20 POINTS!!!!!!! Please help!!!!!!!

Mathematics
2 answers:
Vikki [24]4 years ago
8 0
Your answer is correct in the sense that 14 ≤ x ≤22 since the temperature is 18 ° plus/minus 4°. However, the wording of the problem implies that it wants your final answer in terms of absolute value.

Based on your work, you understand the basics of the problem, and you correctly expressed it as an inequality. The problem is how to express it with an absolute value and only one inequality sign. 

The word "within" implies that ≤ is the correct symbol, rather than < (you were correct to use that symbol)

We can word the expression in this way: The difference between the real temperature and 18° is less than or equal to 4. Difference in this sense is a positive number whether the real temperature is lower or higher than 18, so absolute value is implied.

We can express it mathematically this way:
|18-x| ≤ 4

Plug a few numbers in for X to make sure it makes sense.
If X equals 16 (within the range), |18-16| = 2, which is less than 4
If X equals 20, |-2| equals 2, which is less than 4
If X equals 10, |18-10| = 8, does not comply with our inequality. 
SIZIF [17.4K]4 years ago
4 0

Yes, your answer is correct.

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Answer:

\large \boxed{4}

Step-by-step explanation:

\text{No. of students} = \dfrac{\text{Total distance}}{\text{Distance per student}}

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7 0
3 years ago
Identify the maximum value of the function y = -472 - 24x + -36.
Gnesinka [82]

Answer:

I assume that this is a quadratic equation, something like:

y = -47*x^2 - 24x + (-36)

we can rewrite it as:

y = -47x^2 - 24x - 36

Ok, this is a quadratic equation and we want to find the maximum value.

First, you can notice that the leading coefficient is negative.

This means that the arms of the graph will open downwards.

Then we can conclude that the vertex of the equation is the "higher" point, thus the maximum value will be at the vertex.

Remember that for a general function

y = a*x^2 + b*x + c

the vertex is at:

x = -b/2a

So, in our case:

y = -47x^2 - 24x - 36

The vertex will be at:

x = -(-24)/(2*-47) = -12/47

So we just need to evaluate the function in this to find the maximum value.

Remember that "evaluating" the function in x = -12/47 means that we need to change al the "x" by the number (-12/47)

y = -47*(-12/47)^2 - 24*(-12/47) - 36

y = -32.94

That is the maximum value of the function, -32.94

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B6%7D%20-%20%5Cfrac%7B1%7D%7B2%7D%20-%20%5Cfrac%7B1%7D%7B6%7D" id="TexFormula1
-Dominant- [34]

Answer:

1/6

Step-by-step explanation:

So first you want to get the common denominators. So you want to times 1/2 by three which gives you 3/6. So if you subtract 3/6 from 5/6 you get 2/6 and if you subtract 1/6 from 2/6 you get 1/6.

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3 years ago
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