Answer:
-54.3
Step-by-step explanation:
4(1.5−6.2)−4.5−31
=(4)(−4.7)−4.5−31
=−18.8−4.5−31
=−23.3−31
=−54.3
D is the correct answer to the equation.
<u><em>Answer:</em></u>
The reduced form of
300
/28 is 75
/7
<u><em>Steps to simplifying fractions:
</em></u>
Find the GCD (or HCF) of numerator and denominator
GCD of 300 and 28 is 4
Divide both the numerator and denominator by the GCD
300 ÷ 4
28 ÷ 4
<em><u>Reduced fraction: </u></em>
75
/7
We are asked to determine the correlation factor "r" of the given table. To do that we will first label the column for "Quality" as "x" and the column for "Easiness" as "y". Like this:
Now, we create another column with the product of "x" and "y". Like this:
Now, we will add another column with the squares of the values of "x". Like this:
Now, we add another column with the squares of the values of "y":
Now, we sum the values on each of the columns:
Now, to get the correlation factor we use the following formula:

Where:

Now we substitute the values, we get:

Solving the operations:

Therefore, the correlation factor is 0.858. If the correlation factor approaches the values of +1, this means that there is a strong linear correlation between the variables "x" and "y" and this correlation tends to be with a positive slope.
Answer:
There's not enough information...