Find the sum of the first 20 terms of an arithmetic series if the first term is 10 and the twentieth term is 38.
1 answer:
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Answer:
D
Step-by-step explanation:
Using the rule of logarithms
log x - log y = log()
Given
(
)
= n -
2 → D
Answer:
Equation : y = 4x + 55.50
x = 1.9 gigabytes
Step-by-step explanation:
Given that:
Flat fee per month = $55.50
Cost per gigabyte = $4
Let,
x be the number of gigabytes.
y be the total cost
y = 4x + 55.50
Lily wants to keep her bill $63.10
63.10 = 4x + 55.50
63.10 - 55.50 = 4x
4x = 7.60
Dividing both sides by 4
Hence,
Equation : y = 4x + 55.50
x = 1.9 gigabytes