3 years ago

Why Does The Library Have So many Floors?

Mathematics

1 answer:

loris [4]3 years ago

4 0

(Only doing first six because there's just too many)

Reflection over the x-axis: (x, -y)

Reflection over the y-axis: (-x, y)

Reflection over both axes: (-x,-y)

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e.g. (-5,-9) over x-axis -> (-5,9), 4th letter

(2,-3) over y-axis -> (-2,-3), 9th letter

(6,4) over both axes -> (-6,-4), 17th letter

(-7,2) over both axes -> (7,-2), 12th letter

(-3.9,5) over y-axis -> (3.9,5), 1st letter

(4, 1 1/2) over x-axis -> (4, -1 1/2), 19th letter

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A line passes through (2,−7) and (−3,3) . find the slope-intercept form of the equation of the line. then fill in the value of t

ad-work [718]

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3 years ago

Please help I’m having a hard time

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Answer:

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3 years ago

Write an equation in slope-intercept form of a line that has a slope of -2/3 and a y-intercept of 6.

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3 years ago

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Find a4 for the arithmetic series with S4=-36 and a1=9

erastova [34]

ANSWER

The 4th term is -27

EXPLANATION

The sum of the first n-terms of an arithmetic sequence is

$S_n= \frac{n}{2} (2a_1+d(n-1))$

It was given that,

$S_4 = - 36$

$a_1 = 9$

$- 36= \frac{ 4}{2} (2 \times 9+d(4-1))$

$-36=2(18+3d)$

$-18=18+3d$

$-18 - 18 = 3d$

$3d = - 36$

$d = - 12$

The n-term is given by:

$a_n=a_1+ (n-1)d$

We substitute n=4 to get,

$a_4=9+ (4-1) \times -12$

$a_4=9+ 3\times -12$

$a_4=9 - 36$

$a_4= - 27$

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3 years ago