1. Calculate the following: (42 × 2) ÷ 3 equals...
2. Find the value of x in this equation: 2x - √9 = 15
3. If the circumference of a circle is 2πr, then what is the circumference of a circle with a diameter of 12 cm?
4. John bought 4 apples. Each apple cost him $1.50. He's looking to buy some oranges with the money he has left. If each orange costs $2.20, and John started out with $20, how many oranges can he buy with the money he has left? Explain your reasoning.