The expression 9a + 6s is the cost for a adults and s students to see a musical performance.

A. Find the total cost for three adults and five students.

B. find the total cost for four adults and four students.

just plug in numbers for the letters a and s, and evaluate the expression.

To find the total cost for a given number of adults and students, you simply substitute the values into the expression 9a + 6s.

A. Total cost for three adults and five students:
Substituting a = 3 and s = 5 into the expression:
9a + 6s = 9(3) + 6(5)
= 27 + 30
= 57

Therefore, the total cost for three adults and five students is $57.

B. Total cost for four adults and four students:
Substituting a = 4 and s = 4 into the expression:
9a + 6s = 9(4) + 6(4)
= 36 + 24
= 60

Therefore, the total cost for four adults and four students is $60.

To find the total cost for three adults and five students, you need to substitute the values of a and s into the expression 9a + 6s.

A. Total cost for three adults and five students:
Substituting a = 3 (number of adults) and s = 5 (number of students) into the expression 9a + 6s:
Total cost = 9(3) + 6(5)
= 27 + 30
= 57
Therefore, the total cost for three adults and five students is 57.

B. Total cost for four adults and four students:
Substituting a = 4 (number of adults) and s = 4 (number of students) into the expression 9a + 6s:
Total cost = 9(4) + 6(4)
= 36 + 24
= 60
Therefore, the total cost for four adults and four students is 60.