The old mean was 51 now the mean is 42.33... (round that to 42) 51 - 42 = 9
Answer:
Hey Dude....
Step-by-step explanation:
This is ur answer.....
<h3><em>(a) Six</em></h3><h3><em>(a) Six(b) 120</em></h3><h3><em>(a) Six(b) 120(c) 720</em></h3>
Hope it helps!
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30°
Here's why:
Using the well-known Pythagorian theorem we can reckon how long the hypotenuse is:
c^2=6^2+36*3 -> c=12
Knowing that sin(a)=a/c=6/12=0.5 the measure of the angle in degrees is 30°
Hope could help :)
Answer:
-9
Step-by-step explanation:
= 
It is true that a parallelogram has symmetry with respect to the point of intersection of its diagonals.