We can say that a relationship between two variables is a function if, for every input, we get one and only one unique output. If we want to talk about y as a function of x in this problem, we want to make sure that every x has only one y associated with it. We can do this by solving our equation for x and seeing whether we can have more than one y that satisfies that equation. Here, I'll do the algebra and briefly explain my steps:
Multiply either side by x to cancel the denominator in 1/x:
Add 5x to either side to collect all of the x terms on one side, and subtract 1 to get all of the constants on one side:
Factor an x out of the left side of the equation:
Divide either side by 3y + 5 to get the x by itself:
For every x we pick, only one y can satisfy the above equation, so we can say that yes, is a function.
You must score 86 points on the fourth test to have an average, or at least 90 points.
The average is calculated as the product of all values divided by all possible values. It can also be described as mean. The mean in statistics is the average value for the particular sample or collection of data. It is determined by dividing the total number of observations by the total number of observations.
Given:
In three math tests,
you score 91,95, and 88 points.
Let n be the score of the fourth test.
To find the average:
The average = (91 + 95 + 88 + n) / 4
90 = (91 + 95 + 88 + n) / 4
(91 + 95 + 88 + n) = 360
n = 360 - 274
n = 86
Therefore, the score of the fourth test is 86.
To learn more about the average;
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ABC
Answer: A. 88 degrees
Step-by-step explanation:
Subtract the two given angle measures 131 and 53 from 360
131 + 53 = 184
360 - 184 = 176
Divide 176 by 2 since angle ABC and DBE have the same angle measure.
176 / 2 = 88
Answer:
I believe it is D
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Step-by-step explanation:
hope this helps!