Lauren goes to the exhibition. She purchases a table for $44 and 2 chairs. Each of the chairs costs the same price. Write an expression representing the total cost of her purchases with the cost of the chairs as c. Evaluate the total cost if one chair costs $23. a
$44
b
$90
c
$190
d
$144

B: $90.

Step-by-step explanation:

The expression for this problem can be represented as

Total Cost = $44 + 2c

Since one chair costs $23, the total cost would be:

Total Cost = $44 + 2($23)

2 × 23 = 46

Total Cost = $44 + $46 = $90

The total cost is $90, choice B.

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.