$\"\"$

The expression is $\"\"$ .

$\"\"$ (Distributive Property: a (b + c) = ab + ac)

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Commutative Property: a + b = b + a)

$\"\"$

$\"\"$ (Associative Property: (a + b) +c = a + (b + c))

$\"\"$ (Distributive property: a (b + c) = ab + ac)

$\"\"$ (Add: 2.4 + 0.5 = 2.9)

$\"\"$

The simplified expression is $\"\"$ .