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kogti [31]
3 years ago
10

Use the graph to write the explicit rule of the arithmetic sequence.

Mathematics
1 answer:
Igoryamba3 years ago
6 0

Answer:

f_n=7+\left(-2\right)\left(n-1\right)

Therefore, option C is true.

Step-by-step explanation:

From the graph, we get the sequence

7, 5, 3, 1, ...

Here,

a₁ = 7 is the first element.

An arithmetic sequence has a constant difference 'd' and is defined by  

f_n=a_1+\left(n-1\right)d

computing the differences of all the adjacent terms

5-7=-2,\:\quad \:3-5=-2,\:\quad \:1-3=-2

The difference between all the adjacent terms is the same and equal to

d=-2

substituting a₁ = 7 and d = -2 in the nth term of the sequence

f_n=a_1+\left(n-1\right)d

f_n=7+\left(-2\right)\left(n-1\right)

Therefore, option C is true.

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An animal shelter houses ferrets, cats, and dogs. There are 108 animals at the shelter. Of the
Korvikt [17]

Number of dogs in the shelter are 12

<u>Step-by-step explanation:</u>

Step 1:

Given that total animals = 108 and number of ferrets = 1/3 of 108. Find number of ferrets in the shelter.

Number of ferrets = 1/3 of 108 = 1/3 × 108 = 36

Step 2:

Given that of the remaining animals, number of cats = 5/6. Find the remaining animals and the number of cats.

Remaining number of animals = 108 - 36 = 72

Number of cats = 5/6 of 72 = 5/6 × 72 = 60

Step 3:

Find number of dogs in the shelter.

Number of dogs = 108 - (36 + 60) = 108 - 96 = 12

7 0
2 years ago
Anything can solve this
prohojiy [21]

Answer:

64.87° = 65°{ to the nearest degree}

Step-by-step explanation:

From the figure Catherine is standing 105m from the point B where the Ballon is; this description fits a= 105 m from the diagram.

Similarly Aisha is standing 95m from the point B where the Ballon is; this description fits c= 95 m from the diagram

A = ? ( The angle of elevation of Aisha towards the balloon)

C = 55°

From Sine rule

It states that the sine of an angle divided by its corresponding side is equal for all corresponding angles and sides along the triangle.

This is expressed mathematically as;

Sin A/ a= SinB/ b= SinC/c

We take the pairs of relevance;

Sin A/ a = SinC/c

There SinA = SinC/c × a

=Sin55/95 × 105

= 0.9053

A = Sin^(-1)[0.9053]

A = 64.87° = 65°{ to the nearest degree}

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3 years ago
3/4 divided by 6 and 2/3
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It would be 0.125 for the first answer
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