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3 years ago

Write three more equations with integer coefficients and the variable x that have the same solution set {7, -1}. Explain.

1 answer:

3 0

The given values of abscissa and ordinate in the given are that which when substituted to the values of x and y in the equation will make the equation true. This means that the left and right-hand side of the equation will be equal. The established equations should have a basis of,

x + y = c

The equations are,

x + y = 6

Substituting x = 7 and y = -1,

7 + (-1) = 6 ; 6 = 6

The other two equations will be,

2x + y = 13 and,

x + 2y = 5

It is to be noted that countless of equations can be made with the given solution so long as the equation is valid.

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$B2 = 0.465$ --- Population standard deviation

$C2 = 0.216$ --- Population Variance

Step-by-step explanation:

Given: Wake-up time data

Required: Determine the population standard deviation and the population variance using Excel

First, enter the given data in Excel

For this question, I entered the data in cell A2 through cell A21

Cell B2 and Cell C2 were used to hold the results of the population standard deviation and the population variance, respectively.

In cell B2, the formula to use is:

=ROUNDUP(STDEV.P(A2:A21),3)

The round function rounds the result to 3 decimal places while STDEV.P calculates the population standard deviation.

So, the result is:

$B2 = 0.465$

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=ROUND(VAR.P(A2:A21),3)

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So, the result is:

$C2 = 0.216$

<em>See attachment for Excel file</em>

Download xlsx

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