The Diagram shows a triangle inside a circle woth center O. the lengyhs of the shorter sides of the triangle are 12 cm and 16 cm. work out the area of the circle

Step-by-step explanation:

using pythagorean theorem:

c^2=a^2+b^2

16^2=a^2+12^2

16^2-12^2=a^2

256-144=a^2

10.5=a.(which is the diametre of the circle)

area of cirlcle=

=3.14×5.25^2

area=86.3

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option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.