I am a Grade 8 student and I need help reviewing basic mathematics.
Please provide clear step-by-step solutions for the following practice questions:
The ratio of boys to girls in a class is 3 : 5. If there are 24 boys, how many girls are there?
Simplify the fraction 18/24 and show the steps.
A box contains 45 pencils. If 2/5 of them are red, how many red pencils are there?
Sarah bought 3 notebooks and 2 pens for 16 dollars. Each notebook costs 4 dollars. Find the cost of one pen.
A car travels 180 kilometers in 3 hours. What is its speed in kilometers per hour?
Please explain each answer clearly and simply.
Requirements:

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