Answer:
The equation: 2<em>n</em> - 3 ≤ -21
The answer to the equation: <em>n</em> ≤ 9
Step-by-step explanation:
How to get the equation:
<u>The difference of</u> symbolizes subtraction. Because we are subtracting twice a number and 3, the first part of the equation can be written as 2<em>n</em> - 3. The <em>n</em> symbolizes the number.
<u>is at most</u> symbolizes a less than or equal to sign. That sign is ≤. And what is it less than or equal to? -21.
Now are equation is 2<em>n</em> - 3 ≤ -21
How to solve it:
2<em>n</em> - 3 ≤ -21
Add 3 to both sides of the equation
2<em>n</em> ≤ 18
Divide both sides of the equation by 2
<em>n</em> ≤ 9
Your answer would be, <span>No, it is not a valid inference because her classmates do not make up a random sample of the students in the school </span>
109/18= 6.05 18 goes into 109 6 times with a remainder or .5 so your answer is 6.05
Answer:
Step-by-step explanation:
The nth term of the given arithmetic sequence is
The first term of this series is:
The last term of this series is when
The sum of the first n terms of an arithmetic series when the first an last term is known is given by:
Where a=5 is the first term and l=27 is the last term.
