please
please help me
Answer:
not arithmetic
Step-by-step explanation:
An arithmetic sequence has a common difference d between consecutive terms.
Given
= 2n² - 1
Substitute in n = 1, 2, 3, 4 to generate the first 4 terms of the sequence
= 2(1)² - 1 = 2 - 1 = 1
= 2(2)² - 1 = 8 - 1 = 7
= 2(3)² - 1 = 18 - 1 = 17
= 2(4)² - 1 = 32 - 1 = 31
check the difference between consecutive terms
7 - 1 = 6
17 - 7 = 10
31 - 17 = 14
The differences are not common hence not an arithmetic sequence
The length of the rectangular block of land is 98 m.
The perimeter of the rectangular block is given by following formula;
Let l is the length of a rectangular block of land and w is the width of a rectangular block of land.
The width of a rectangular block of land is 2/7 of its length. If it’s perimeter is 252m, find it’s length.
The width of a rectangular block of land is 2/7 of its length.
w = (2/7) l
The width of the rectangular block of land is;
The width of the rectangular block of land is;
Hence, the length of the rectangular block of land is 98 m.
Learn more about perimeter here;
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Answer:
Step-by-step explanation:
the perimeter is : p = 2(x+y)..... x : width y : length
you have the system ; 2(x+y) = 252.......(1)
x = (2/7) y ...........(2)
y > x ....(3)
Substitute x = (2/7) y into (1) and simplifiy and solve for y :
(2/7) y + y = 126
(2y+7y)/7 = 126
9y = 882
y = 98 m ( the length )