Answer:
(A) 120°
Step-by-step explanation:
m∠P=x
m∠S=2x
m∠Q=x
m∠R=2x
Sum of the angles in trapezoid is 360°.
x+x+2x+2x=360
6x=360
x=60°
m∠R=2x=2*60=120
What are u trying to ask the number of boys or girls or both?
Answer:
D) 
Step-by-step explanation:
Given expression:
The above expression can be rewritten using grouping symbols by using properties of equality.
We apply distributive property of multiplication according to which:
the product of a number and each addend individually added together is equal to the product of that number and sum of the addends.
So, we can write
9 students, 4 are selected and order doesn't matter:
Go to the 9th row of the triangle (mind you the first row is 0), the 2nd is 1st row
9th row: 1 9 36 84 126 126 84 36 9 1
Now choose the 4th column (excluding the 1st , you will get 126 :
so 126 is the number of combination requested:
PROOF: ⁹C₄ = 9!/(9-4)! .4! = (9!)/5!.4! = 126
Answer:
0.4n = 8
n = 20
Step-by-step explanation:
0.4n = 8
n = 8 / 0.4
n = 20
