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yKpoI14uk [10]
2 years ago
12

Which ordered pairs make both inequalities true? Select two options. y < 5x + 2 y > One-halfx + 1 On a coordinate plane, 2

straight lines are shown. The first solid line has a positive slope and goes through (negative 2, 0) and (0, 1). Everything above the line is shaded. The second dashed line has a positive slope and goes through (negative 1, negative 3) and (0, 2). Everything to the right of the line is shaded. (–1, 3) (0, 2) (1, 2) (2, –1) (2, 2)

Mathematics
1 answer:
Lena [83]2 years ago
8 0

Answer:

(1,2) and (2,2)

Step-by-step explanation:

we have

y ----> inequality A

The solution of the inequality A is the shaded area  below the dashed line y=5x+2

y\geq \frac{1}{2}x+1 ----> inequality B

The solution of the inequality B is the shaded area above the solid line y= \frac{1}{2}x+1

The solution of the system of inequalities is the shaded area below the dashed line A and above the solid line B

Remember that

If a ordered pair make both inequalities true, then the ordered pair is a solution of the system of inequalities

If a ordered pair is a solution of the system of inequalities, then the ordered pair lie in the shaded area of the solution set of the system

using a graphing tool

Plot the points and verify f the ordered pairs lies in the shaded area of the solution set

The solutions are the points (1,2) and (2,2)

see the attached figure to better understand the problem

Note The point (0,2) is not a solution because line A is a dashed line

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Answer:

The quantity of frosted donuts = 2

The quantity of glazed donuts = 9

The quantity of custard filled donuts = 1

Step-by-step explanation:

Let the quantity of frosted donuts = x

Let the quantity of glazed donuts = y

Let the quantity of custard filled donuts = z

As per question statements, following equations can be made:

x+y+z=12......(1)\\2x+y+5z=18.....(2)\\x=2z ...... (3)

Putting x=2x in (1) and (2):

y+3z=12 .... (4)\\y+9z=18 .... (5)

Subtracting (4) from (5):

6z=6\\\Rightarrow z =\bold{1}

By equation (3):

x=\bold{2}

By equation (1):

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Therefore, the answers are:

The quantity of frosted donuts = 2

The quantity of glazed donuts = 9

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The heights of students in a class are normally distributed with mean 55 inches and standard deviation 5 inches. Use the Empiric
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Answer:  c)[50,60]

Step-by-step explanation:

The Empirical rule says that , About 68% of the population lies with the one standard deviation from the mean (For normally distribution).

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Then by Empirical rule, about 68% of the heights of students lies between one standard deviation from mean.

i.e. about 68% of the heights of students lies between \text{Mean}\pm\text{Standard deviation}

i.e. about 68% of the heights of students lies between 55\pm5

Here, 55\pm5=(55-5, 55+5)=(50,60)

i.e.  The required interval that contains the middle 68% of the heights. = [50,60]

Hence, the correct answer is c) (50,60)

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