Answer:
C. 28.26
May I have brainliest please? :)
Answer:
k = - 2
Step-by-step explanation:
( 2x - y )²
Formula : -
( a - b )² = a² + b² - 2ab
Here,
a = 2x
b = y
( 2x - y )²
= ( 2x )² + y² - 2 ( 2x ) ( y )
= 4x² + y² - 4xy
So,
( 2x - y )² = 4x² + y² - 4xy
( 2x + y )²
Formula : -
( a + b )² = a² + b² + 2ab
Here,
a = 2x
b = y
( 2x + y )²
= ( 2x )² + y² + 2 ( 2x ) ( y )
= 4x² + y² + 4xy
So,
( 2x + y )² = 4x² + y² + 4xy
( 2x - y )² - ( 2x + y )²
= 4x² + y² - 4xy - ( 4x² + y² + 4xy )
= 4x² + y² - 4xy - 4x² - y² - 4xy
= 4x² - 4x² + y² - y² - 4xy - 4xy
= 0 + 0 - 8xy
= - 8xy
( 2x - y )² - ( 2x + y )² = 4xyk
- 8xy = 4xyk
Divide 4xy on both sides,
- 8xy / 4xy = 4xyk / 4xy
- 2 = k
k = - 2
Therefore, the value of k is - 2.
Answer:
Step-by-step explanation:
The smaller polygon is half the size of the original polygon
Answer:
2 = 2 (Identity)
Step-by-step explanation:
1/3 (x+2)=-2/5 (x-9) and x=4
Follow distributive property
1/3x + 2/3 = -2/5x + 18/5
Replace x for 4
1/3(4) + 2/3 = -2/5(4) + 18/5
4/3 + 2/3 = -8/5 + 18/5
Add like terms
6/3 = 10/5
Simplify
2 = 2
Also known as Identity
Answer:
36%
Step-by-step explanation:
So 36% of the team is in 6th grade.
