<span>150% to decimal = 1.50 since 100% = 1
</span><span>1.50 x 20 = 30
</span><span>30 + 20 = 50</span>
Answer:
<h2>C. 6x² + 6x² + 3x + 4</h2>
Step-by-step explanation:

Average speed = (total distance) / (total time)
Average speed = (192 km) / (8 hours) = 24 km per hour .