Answer:
Work out the Mean (the simple average of the numbers)
Then for each number: subtract the Mean and square the result.
Then work out the mean of those squared differences.
Take the square root of that and we are done!
Answer:
= 13.5
Step-by-step explanation:
<u><em>Explanation:</em></u>-
Given that the equation

cross multiplication, we get
= 4.5 × 3
= 13.5
It is 16x2-24x+9
So...you can put it into the form a2+2ab+b2=(a+b)^2
Answer:
<em>PZ = 15</em>
Step-by-step explanation:
<u>Similar Triangles</u>
Two triangles are similar if all of their corresponding side lengths are proportional to the same scale factor.
It's given triangles TPR and XPZ are similar, thus we can find the scale factor by comparing two corresponding sides with known lengths.
Sides TR and ZX are corresponding and the proportion of their side lengths is 15/9. The same proportion must be satisfied by the sides TP and XP:

PX and PZ are congruent, thus:


Calculating:
PZ = 15
Answer:
<u>80 boys</u>
Step-by-step explanation:
160 total players
50% are boys
50% of 160 is 80