The cost of hiring a catering service to serve food for a party is 150 pesos per head for 20 persons or less,130 pesos per head for 21 to 50 persons and
110 pesos per head for 51 to 100 persons.For 100 or more persons,the cost is at 100 pesos per head.Represent the total cost as a piecewise function of the number or attendances of the party.



At Jefferson School, both 6th grade & 7th grade classes take a math test. The average score for the 6th grade is 80 and for the 7th grade is 90. If there are twice as many students, in the 7th grade as there is in the 6th grade, what is the average test score for both grades ...