2:5 is how much out of 27
1 answer:
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Answer:
63.3 square feet
Step-by-step explanation:
Let a = 20 ft, B = 15 ft, c = 9ft
Answer:
a_{n}=20+4(n-1)
Step-by-step explanation:
It is given that the number of corn stalks in rows of the field can be modeled by an arithmetic sequence.
The 5th row has 36 corn stalks. This means 5th term of the sequence is 36. i.e.
The 12th row has 64 stalks. So,
In order to write the explicit rule we need to find the first term(a1) and common difference(d) of the sequence.
The explicit rule for the arithmetic sequence is of the form:
Writing the 5th and 12th term in this way, we get:
Equation 1
Similarly for 12th term, we can write:
Equation 2
Subtracting <u>Equation 1</u> from <u>Equation 2</u>, we get:
7d = 28
d = 4
Using the value of d in <u>Equation 1</u>, we get:
Thus, for the given sequence first term is 20 and common difference is 4. Using these values in the general explicit rule, we get: