An Electrician charges $30 for a service call plus $75 per hour of service. If he charged 210 how many hours did he work?
1 answer:
Answer:
2.4 hours Electrician works.
Step-by-step explanation:
Let us assume that the number of hours Electrician works be x.
As given
An Electrician charges $30 for a service call plus $75 per hour of service.
If Electrician charged $210.
Than the equation becomes
30 + 75x = 210
75x = 210 - 30
75x = 180
x =2.4 hours
Therefore 2.4 hours Electrician works.
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Answer:
= 34.5
Step-by-step explanation:
The n th term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given = 121.5, then
a₁ + (69 × 1.5) = 121.5
a₁ + 103.5 = 121.5 ( subtract 103.5 from both sides )
a₁ = 18
Hence
= 18 + (11 × 1.5) = 18 + 16.5 = 34.5