Plz help I am very confused, brainliest goes to whoever answers correctly, and first

1/4 × 3 + 3/8 × 4 + 1/2 × 3 + 5/8 × 2

3/4 + 12/8 + 3/2 + 10/8

6+12+12+10/8

40/8

5

answer is 5 lb

All the kittens weigh 5 pounds altogether

Step-by-step explanation:

1/4 pounds: 3 kittens

3/8 pounds: 4 kittens

1/2 pounds: 3 kittens

5/8 pounds: 2 kittens

3*1/4 = 3/4

3/8*4 = 1.5

1/2*3 = 1.5

5/8*2 = 1.25

Sum up:

3/4 + 1.5 + 1.5 + 1.25 = 5

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.

0,0

step-by-step explanation: