In circle Q with
m
∠
P
S
R
=
2
1
∘
m∠PSR=21
∘
, find the angle measure of minor arc
⌢
.
PR
⌢
.
P

The minor arc PR is 42 degrees

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The inscribed angle is half that of the arc comprising

so

we have

substitute

Remember that the minor arc in a circle is less than 180 degrees

therefore

The minor arc PR is 42 degrees

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.

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3