Question

please answer give please 3 questions

Answer 1

10
2y+3z+z-y+4y-2z=5y-2z

9
2(3a-b+6b-a)=2(2a+5b)=4a+10b

11
2(8x^2+3x+ y)=16x^3-6x^2+12x+4
8x^2 +3x +y = 8x^3 -3x^2 +6x +2
y = 8x^3 -11x^2 +3x +2

Answer 2

9)-

Perimeter = 2(sum of adjacent sides)
                 = 2 [(3a -b) + (6b -a) ]
                 =  2( 3a -b + 6b - a)
                 = 2(2a +5b)
                 = 4a +10b
perimeter  = 4a +10b

Correct answer: (2) 
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10)-

Perimeter of triangle = sum of sides
                                 
perimeter = 2y + 3z + z - y + 4y - 2z 
                =  2y -y + 3z +z  -2z + 4y 
                = y + 2z + 4y
                = 5y + 2z
Perimeter= 5y + 2z 

Correct option: (1)

11) - 

perimeter = 2(sum of sides)

16x³ -6x² + 12x + 4 =  2(8x² + 3x + other side)

2(8x³ - 3x² + 6x + 2) =  2(8x²  + 3x + other side)

8x³ -3x² + 6x + 2 = 8x² + 3x + other side

8x³ -3x² -8x² + 6x - 3x + 2 = other side

8x³ -11x² +3x + 2 =other side

other side = 8x³ -11x² + 3x + 2

Correct option:  (2)




i hope this will help you


-by ABHAY