Rewrite 2 + 1/b - 2 = 3b/b + 2 as a proportion. Which of these proportions is equivalent to the original equation?
A.) 3/b-2 = 3b/b+2
B.) 2b+3/b-2 = 3b/b+2
C.) 2b-3/b-2 = 3b/b+2

Solve the original equation by solving the proportion.
The solutions are
-6, -1
-6, 1
-1, 6
1, 6

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 )