Answer:
20. A. y= 10x = 15
21. C. Php 75.00
22. B. Php 195.00
Explanation:
She has to pay 25 Pesos for one hour and only ten more each hour after that. That can be represented in the formula Y= 10x +15. To solve the rest of the questions, just substitute 6 hours for question 21 and 18 hours for question 22.