Answer:
19.2
Step-by-step explanation:
Rewrite 1/2(10x +5) as (1/2)(10x +5) for clarity.
Next, substitute 1.4 for x:
(1/2)(10[1.4] +5)
According to rules of operation, work inside parentheses must come before all else. Thus we obtain:
(1/2)(14+5), or (1/2)(19). Finally, this simplifies to 19/2.
