4.95 x 4 = 19.80
55.29 - 19.80 = 35.49
35.49 / 2.73 = 13
You and your friends purchased 13 gallons of gas
Answer:

Step-by-step explanation:
From the table of function given, you would observe that if you subtract 2 from half of the x-variable values, you'd get the y-variable values.
For example, half of -8 = -4. If you add 2 to -4, you'd get: -4 + 2 = -2. Same applies to other x-values on the table.
Thus, an expression for the function represented by the table values can be written as,

Answer:
The average number of trials required to get the first success