A store is having a sale on where on all shoes are discounted by 20 percent. Diego has a coupon for 3$ off of the regular price for one pair of shoes. The store first applied the coupon and takes 20% off the reduced price. If Diego pays 18.40 for a pair of shoes, what was their original price before the sale without the coupon?

$26

Step-by-step explanation:

0.8(X - 3) = 18.4

X - 3 = 23

X = 26

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.

b and c

step-by-step explanation: