If R is the midpoint of (QS), RS=x, ST=3x-4, and RT=8x-43, find QS.

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 )

Let us take option c(-3x + 6i)(x + 2i)-3x² - 6xi + 6xi + 12i²-3x² + 12i²we know that i² = -1-3x² - 12option c is the answer