Me ayudan con mi tarea porfavor, operaciones combinadas =) a) 3 x 5 (18 : 6) + 2 x 3
b) 5 + 3 - 4 + ( 6 x 7) - (18 : 3)
c) (72 : 9) + 3 - 5 + (4 x 5)
d) 100 - 52 - (56 : 7) + 13
e) 6 - 4 x (54 : 6) + 18 - (2 x 3)
f) 7 x (48 : 8) + (27 : 3) - 5 x 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 )