Answer:
All real numbers / (-∞, ∞) / R
Step-by-step explanation:
The equasion provided is a linear equasion meaning it can be written in the y=ax+b format, where both a and b are real numbers. All linear eqasions have a range of all real numbers, you can write this using the three solutions provided.
You can solve this two ways, number one would be to put this in a graphing calculator and number two would be reducing the equasion to the y=ax+b format.
<h2>Method 1:</h2>
look at image provided. The app is PhotoMath.
<h2>Method 2:</h2>
Write the equasion:
y = -2x - 6x + 1
Collect like terms:
y = -8x + 1
This now proves that the equasion is linear becuase you can write it in the y=ax+b format. a being -8 and b being 1.
Answer:
and
Step-by-step explanation:
The formulas for the area and perimeter of a rectangle are, respectively:
The perimeter is equal to:
Area is likewise equal to:
Then, equations are now described:
Likewise, the equation of area is simplified afterwards:
The area is reduced inasmuch as length is increased. Let assume that length is 100 meters. The length and width are described herein:
and
Answer:
Fifth Score = 87
Sixth Score = 95
Step-by-step explanation:
Given
Required
Set up an equation
Solve for the fifth and sixth score
Average is calculated as thus:
Substitute 85 for Average
Multiply both sides by 6
Solve for 2x
Solve for x
Hence:
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42 to ^5 is standard form
Answer:
The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
For this problem, we have that:
95% confidence level
So , z is the value of Z that has a pvalue of , so .
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).