The right answer is Option B.
Step-by-step explanation:
Let,
Number of songs = x
Price of 1 song = $0.99
Membership fee = $19.99
Total amount paid = $21.97
According to given statement;
0.99x+19.99=21.97
Subtracting 19.99 from both sides

Dividing both sides by 0.99

Lauren bought 2 songs.
The right answer is Option B.
Keywords: Linear equation, subtraction
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Total cost of painting 225 cm² will be:
Cost=(total area)×(cost per cm²)
area=225 cm²
cost per cm²=$0.12
thus the total cost will be:
Cost=0.12×225=$27
Answer: $27