What is r the common ration in the geometic sequence 2, -14, 98, -687
1 answer:
Answer:
r is -7
Step-by-step explanation:
(I believe that you mistyped and meant that the fourth term in the sequence should be -686)
The easiest way to find the common ratio is to divide the numbers that are adjacent to each other
As you can see, when we divide a term by its previous term, we get -7 every time. This is our common ratio.
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Answer:
The answer is below
Step-by-step explanation:
The diameter of a tire is 2.5 ft. a. Find the circumference of the tire. b. About how many times will the tire have to rotate to travel 1 mile?
Solution:
a) The circumference of a circle is the perimeter of the circle. The circumference of the circle is the distance around a circle, that is the arc length of the circle. The circumference of a circle is given by:
Circumference = 2π × radius; but diameter = 2 × radius. Hence:
Circumference = π * diameter.
Given that diameter of the tire = 2.5 ft:
Circumference of the tire = π * diameter = 2.5 * π = 7.85 ft
b) since the circumference of the tire is 7.85 ft, it means that 1 revolution of the tire covers a distance of 7.85 ft.
1 mile = 5280 ft
The number of rotation required to cover 1 mile (5280 ft) is:
number of rotation =
Answer:
Step-by-step explanation:
6^4/6^1
6^(4-1)
=6^3
Make a substitution:
Then the system becomes
Simplifying the equations gives
which is to say,
Substituting this into the new system gives
Then
(meaning two solutions are (7, 13) and (-7, -13))