Answer:
C = $137.50
Step-by-step explanation:
Okie dokie, so we already know he charges $50 just for a service call, plus 25 per hour, so let's say the total charge is C.
Now, let's make an equation:
C = 50 + 25(3.5)
Now, multiply 25 and 3.5 together:
C = 50 + 87.5
Now we just combine the like terms:
C = $137.5
Hope this helps :)
Answer:
4.472135955
Step-by-step explanation:
I used a Calculator

Probability of a rock song would be 2/7 ( 2 rock songs out of 7 total songs)
Probability of a country song after that would be 3/6 (3 country songs out of 6 songs left) this can be reduced to 1/2
The probability of both = 2/7 x 1/2 = 2/14 = 1/7
U should use friendly numbers when subtracting.......the numbers have to be between 3 and 10