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zimovet [89]
3 years ago
13

Simplify −9 + 1/4x − 6 − 1/8x.

Mathematics
2 answers:
enot [183]3 years ago
5 0

Answer:

- 72x-1 /8x

Step-by-step explanation:

Tpy6a [65]3 years ago
5 0

Answer: -15+1/8x

Step-by-step explanation:

-9+1/4x-6-1/8x

You must add the 9 and 6 because they are both negative numbers and you get -15. You would multiply 1/4 by two in order to subtract 1/4 from 1/8. You would have 2/8-1/8 which would get you 1/8.

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An author published a book which was being sold online. The first month the author sold 21000 books, but the sales were declinin
Wittaler [7]

Answer:  119,616

You may have to erase the comma when inputting the answer.

=======================================================

Explanation:

The author sells 21,000 books in the first month.

Then they sell 21,000*(1-0.12) = 21,000*(0.88) = 18,480 in the second month.

Then they sell 18,480*(1-0.12) = 18,480*(0.88) = 16,262.4 = 16,262 in the third month.

And so on. These values follow a geometric sequence with first term a = 21,000 and common ratio r = 0.88

We can think of the 0.88 as 88% of the original value (since losing 12%, we keep the remaining 88%)

-------------

Use the formula below to sum the first 9 terms of the geometric sequence

Plug in a = 21000 and r = 0.88

S_n = a*\frac{1-r^n}{1-r}\\\\S_9 = 21000*\frac{1-0.88^9}{1-0.88}\\\\S_9 \approx 21000*\frac{0.6835216}{0.12}\\\\S_9 \approx 21000*5.6960133\\\\S_9 \approx 119,616.2793\\\\S_9 \approx 119,616\\\\

The author sold about 119,616 books over the course of the first nine months.

4 0
2 years ago
Which list shows all the factors of 54? A. 1, 2, 3, 6, 9, 12, 18, 27, 54 B. 1, 2, 3, 6, 9, 18, 27, 54 C. 1, 2, 3, 6, 9, 18, 54 D
sergey [27]

Answer:

C

Step-by-step explanation:

Bc I have Big Brain and Google is nice

6 0
3 years ago
Read 2 more answers
A square can be. Rhombus, and figure X is a rhombus, so figure X must be a square. True or false
kvasek [131]
I have to go with True because a Rhombus is a Square. 
3 0
3 years ago
Read 2 more answers
What is the approximate perimeter of a semicircle with a radius of 8 m? Use pi star times = 3.14. Express your final answer to t
irga5000 [103]
The perimeter of a semicircle consists of two parts. (the curve and bottom)
That curve is half the distance around the circle, since it's been split in half.
The distance around a circle, the circumfrence, is equal to 2πr, where r is the radius of that circle. In this case, the circumfrence of the entire circle would be 16π. and so that curve would have a length of just 8π.
Using 3.14 for π, 8π = 8×3.14 = 25.12.
As for the flat part, that is the diameter (distance across) our circle.
The radius is the distance from the center of a circle to its edge, and always has half the length of the diameter. (you can break the diameter down into two radii)
If our radius is 8 meters, our diameter (the flat part of that semicircle) must be 16.
Now we add up the two parts of the perimeter...25.12 + 16 = 41.12.
5 0
3 years ago
Find the slope of the line containing the points (5, -1) and (-8, -4).
UkoKoshka [18]
I think it might be D
7 0
2 years ago
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