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melomori [17]
3 years ago
10

If n is a term of the sequence 2, 5, 8, 11, ..., which expression would give the value of n?

Mathematics
1 answer:
Sergio039 [100]3 years ago
3 0
Nth term =a+(n-1)d
=2+(n-1)3
=2+3n-3
=3n-1 (Ans)
a=first term
d=common difference
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Alenkasestr [34]

Answer:

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Step-by-step explanation:

Your question is how to solve for a missing side length of a triangle when given 2 sides length and an angle. The side length can be solved using the cosine rule . We use cosine rule to find the length of a side of a triangle when given two sides and an included angle.

The cosine rule formula for finding a side length are as follows

c² = a² + b² - 2ab cosC

b² = a² + c² - 2ac cosB

c² = a² + b² - 2ab cosC

Using cosine rule

c² = 4² + 3² - 2 × 4 × 3 cos 120°

c² = 16 + 9 - 24 cos 120°

c² = 25 - 24 (-0.5)

c² = 25 + 12

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3 years ago
40 is the sum of 15 and Craig's savings.<br> Use the variable c to represent Craig's savings.
andrew-mc [135]
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When will n(A∩B)=0? Explain and give an example.
andrew11 [14]

Answer:

Two sets are called disjoint if they have no elements in common. For example:

The sets S = { 2, 4, 6, 8 } and T = { 1, 3, 5, 7 } are disjoint.

Another way to define disjoint sets is to say that their intersection is the empty set,

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In the example above,

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Step-by-step explanation:

8 0
3 years ago
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weeeeeb [17]

Answer:

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Step-by-step explanation:

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Required

Determine the proper subsets

Proper Subset (P) is calculated using;

P = 2^n - 1

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In this case;

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So:

P = 2^n - 1

P = 2^{10} - 1

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<em>Proper Subsets = 1023</em>

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3 years ago
B. (4,-7)
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