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Elden [556K]
4 years ago
12

A set of points in the xy-coordinate plane meets two conditions, as described.

Mathematics
1 answer:
Pepsi [2]4 years ago
3 0

Answer:

Condition 1:   y>0

Condition 2:  x+y>-2

Step-by-step explanation:

We are told that we have a set of points in the Cartesian system (i.e. x-y coordinate), so we can define our point as:

(x,y)

We are given two conditions and we want to create a system of inequalities. Now, generally speaking, inequalities are expressions relating mathematical expressions through 'comparison' (i.e. less than, greater than, or less/greater and equal to) usually recognized by , >, \leq and \geq, respectively.

So in our case let set up our inequalities.

Condition 1: the y-coordinate is positive

This can be mathematically translated as

y>0

(i.e. y is greater than 0, therefore positive)

Condition 2: the sum of the coordinates is more than -2

This can be mathematically translated as

x+y>-2

(i.e. the summation of the two coordinates is greater than -2 but not equal to).

The system of inequalities described by the two conditions is:

y>0\\x+y>-2

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The parents who didn't answer with either naughty and nice are <u>6</u>.

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Given:

150 parents were surveyed. 26% said that the kids were naughty and 70% said their kids were nice.

Now, to find parents who didn't answer with either naughty and nice.

<em>So, as given in question:</em>

<em>70% said that their kids are naughty.</em>

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So, to get the percentage of parents who didn't answer we subtract.

<em>Thus, the percentage of  parents who didn't answer with either naughty and nice:</em>

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Now, to get how many  parents didn't answer we calculate the percentage of the total who didn't answer:

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<em>Parents who didn't answer =  4% of the total parents surveyed.</em>

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