I really don't understand what it is asking. Also I need help.

1) 45°; 2) 3√2.

Step-by-step explanation:

1) according to the condition the lengths BC=AC and m(∠C)=90°, it means m(∠θ)=(180-90)/2=45°;

2) if AC=BC=3 and m(∠C)=90°, then AB=AC*√2=3√2

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

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.