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RUDIKE [14]
3 years ago
13

Arithmetic series help!!!!

Mathematics
1 answer:
jekas [21]3 years ago
4 0

The initial term of the sequence is 15. The common difference is 3, so the n-th term (an) is

... an = 15 + 3(n-1)

For n=14, the 14th term of the sequence is

... a14 = 15 + 3(14 -1) = 54

The sum of terms is the average of the first and last, multiplied by the number of terms:

... sum = (15 + 54)/2·14 = 7·69 = 483

The appropriate answer choice is

... 54; 483

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it's it's 396 because if you add 99 more you will get 495.

each percentage is 99, so 99 x 5 is how many students there are 99 x 4 is the answer.

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If a number is not a natural number then it is not a whole number
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POSSIBLE POINTS 10 Jessica writes the expression b + 5 . . Which expression is equivalent to the one Jessica writes?​
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Step-by-step explanation:

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3 years ago
1/4x + 1 + 3/4c - 2/3 - 1/2x<br><br> what is it equal to??
mylen [45]

Answer: -1/4x+1/3+3/4c

Step-by-step explanation:

<h2>We can't solve it but we can simplify</h2>
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RSTU is a rectangle with vertices at R(-3,1), S(1 ,1), T(-3,3) and U (1, 3). Describe two lines of reflection that would carry t
miss Akunina [59]

Answer:

The two lines of reflection are x=-1 and y=2

Step-by-step explanation:

I will attach a file with the graph of the rectangle and the lines of reflection.

We know that RSTU is a rectangle with vertices at R=(-3,1) , S=(1,1),

T=(-3,3) and U=(1,3)

The first step is to draw the vertices on the plane and them the rectangle.

The rectangle is a symmetrical figure. Therefore if we want to carry the rectangle onto itself using a line of reflection this line must goes through the centroid of the rectangle.

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