In the diagram below, \overline{ab} \parallel \overline{df},
ab
∥
df
, \text{m}\angle dce = 103^{\circ}m∠dce=103
∘
and \text{m}\angle cef = 150^{\circ}.m∠cef=150
∘
. find \text{m}\angle b. m∠b.
a
b
c
d
e
f
103°
150°
you may assume lines that appear straight are straight, but the figure is not otherwise drawn to scale.

\text{m}\angle b=m∠b=
^{\circ}
∘

anser is a

step-by-step explanation:

negitive slope

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .