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marissa [1.9K]
3 years ago
8

21. Find the nth term for the sequence 1, 5, 9, 13, ...

Mathematics
1 answer:
gtnhenbr [62]3 years ago
7 0
21.
an=a1+d(n-1)
a1=first term
an=nth term
d=common differnce
n=which term

firs term is 1
common differnce is 4 (1+4=5)
so

an=1+4(n-1)
or
an=1+4n-4
an=-3+4n


22.

solve for n such that
-3+4n=95
add 3 to both sides
4n=98
divide both sides by 4
n=24.5
we can't have a non-whole number for n because it names a number, we can't have the 24.5th number, we can have the 24th or 25th, but not the 24.5th
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Answer:

The answer is below

Step-by-step explanation:

Mrs. Fielder decides to build a small snow shelter for her children to wait in before the school bus arrives in the morning. She has only enough wood for a total perimeter of 20 feet.

a. Make a table of all the whole number possibilities for the length and width of the shelter. Find the area of each shelter.

b. What dimensions should Mrs. Fielder choose to have the greatest area in her shelter?

c. What dimensions should Mrs. Fielder choose to have the least area in her shelter?

d. Township building codes require 3 square feet for each child in a snow shelter. Which shelter from part (a) will fit the most children? How many children is this? Explain your reasoning.

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2                              8                        16

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5                              5                         25

b) The shelter with a length of 5 ft and width of 5 ft has the largest area.            

c) The shelter with a length of 1 ft and width of 9 ft has the least area.  

d) The 4 by 6 ft shelter can hold 8 children (24 ft² / 3 ft² = 8) and the 5 by 5 ft shelter can hold 8 children with an extra space (25 ft² / 3 ft² = 8.33).

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