Sarah has 52 balloons;13 of the balloons are red, and 4 of the balloons have polka dots. Just 1 of the red balloons has polka dots. What is the probability of randomly choosing a balloon that is either red or has polka dots

17/52

Step-by-step explanation:

red: 13/52

polka dots: 4/52

13 + 4 = 17 = 17/52

(p.s the "Just 1 of the red balloons has polka dots." was kinda to throw u off it doesn't actually matter)

if this is really you s much. i only have 3 points left and i have 2 questions to ask

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.