Given the function f(x) = 5(x+4) − 6, solve for the inverse function when x = 19..

F(x) = 5 ( x + 4) - 6
y = 5 (x + 4)

interchange x and y and then solve for y
x = 5 (y + 4)





∴  

Solve for x= 19 for the inverse found

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )