Can you help me with this it's synthetic substitution or direct substitution

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[Eqn 3]

f(x) = x³ + 3x² + 6x - 11 when x = 5

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[Eqn 4]

f(x)=x³ - x² + 12x - 15 when x = 1

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[Eqn 5]

f(x) = 2x³ + 6x² + 4x + 8 when x = 2

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi