The expression 27.50+ 0.11x models the monthly cost in dollars of a phone plan. In the expression, x represents the number of minutes you talk . What is the cost of the phone if you talk for 37 minutes that month ?

31.57

Step-by-step explanation: If x is 37, that would mean 0.11 x 37 and that equals 4.07. Then you would add 27.50 and 4.07 and get 31.57.

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.

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!