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4 years ago

Select the equation or inequality that matches the number sentence below.

Mathematics

1 answer:

kakasveta [241]4 years ago

7 0

< = less than

> = greater than

57 is less than(<) x minus(-) 19

57 < x - 19

Your answer is the 4th option because:

The 1st option is not the answer because 19 is subtracted by x when it should be x minus 19, and the sign is > when it should be <

The 2nd option is not the answer because it should be x minus 19

The 3rd option is not the answer because the sign is > when it should be <

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The following table represents a sample of sale prices, in thousands of dollars, and number of

djverab [1.8K]

Correct question

Sale Price :160 | 180 | 200 | 220 | 240 | 260 | 280

New home : 126 | 103 | 82 | 75 | 82 | 40 | 20

A.) state the linear regression function that estimates the number of new homes available at a specific price.

B.) state the correlation Coefficient of the data, and explain what it means in the context of the problem

Answer:

Y = -0.79X + 249.86

R = -0.9543

Step-by-step explanation:

Sale Price :160 | 180 | 200 | 220 | 240 | 260 | 280

New home : 126 | 103 | 82 | 75 | 82 | 40 | 20

Calculate the Linear regression equation :

Using the linear regression calculator :

The linear regression equation is :

Y = -0.79X + 249.86

The correlation Coefficient 'R' measures the strength of statistical relationship between the relative movement of two variables. The The value of R is -0.9543 in the question above.

This is a strong negative correlation, which means that high sales price of homes scores correlates with low number of new homes scores (and vice versa). Homes with high sales price have fewer number of new homes.

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Cube numbers between 100 and 400

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Answer with step-by-step explanation:

Let us find the perfect cubes between 1 to 100.

We know that, 1

=1,2

=8,3

=27,4

=64 and the rest numbers i.e. 4,5,6,.... have their cubes greater than 100.

So, only these four numbers have their cubes between 1 to 100.

Thus, there are 4 perfect cubes from 1 to 100.

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We know, 0

=0,(−1)

=−1,(−2)

=−8,(−3)

=−27,(−4)

=−64 and the rest numbers have their cubes less than −100

So, only these 5 numbers have their cubes between −100 to 0 and 4 perfect cubes are there from 1 to 100.

Thus, there are 9 perfect cubes from −100 to 100.

plz mark me as brainliest.

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3 years ago

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