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3 years ago

Which expression is equivalent to 9x – (x – 8)(x + 1) + 10x?

Mathematics

2 answers:

Julli [10]3 years ago

8 0

Answer:

-x^2+26x+8

this is your answer should be option B.

DochEvi [55]3 years ago

3 0

If you download Photomath this one app it shows you all you gotta do is scan it and it gives you the correct answer and show you how it got it to help you understand

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When the population mean and standard deviation are known, what distribution is used for the analysis of the sample?.

Kitty [74]

When the population mean and standard deviation are known, you use the standard normal distribution

<h3>How to determine the distribution?</h3>

There are several probability distributions; these include

Normal distribution
Poisson distribution
Chi square distribution
Binomial distribution
Etc

Of all these distribution, only the standard normal distribution can be used when the population mean and standard deviation are known,

Note that it is also referred to as the z-distribution

Read more about probability distributions at:

brainly.com/question/24756209

7 0

2 years ago

You play a video game for 15 minutes. You lose 75 points. What integer represents the mean change in points per minute?

Viefleur [7K]

This means you lose 5 points per minute on AVERAGE.

Divide 75 by fifteen and you get 5

Have a brainly! day :)

7 0

3 years ago

15 of the books for sale at a bookstore store are hardcover. If this represents 12% of all books

spin [16.1K]

The right answer is Option C.

Step-by-step explanation:

Hardcover books = 15

This represent 12% of total books.

Let,

x be the total number of books, therefore,

12% of x = 15

$\frac{12}{100}*x=15\\0.12x=15$

Dividing both sides by 0.12

$\frac{0.12x}{0.12}=\frac{15}{0.12}\\x=125$

As, 15 of them are hardcover books, the remaining will not be hardcovers;

Remaining books = Total books - hardcover books

Remaining books = 125 - 15 = 110

115 books are not hardcover.

The right answer is Option C.

Keywords: division, percentage

Learn more about percentages at:

#LearnwithBrainly

7 0

3 years ago

3/4-1/2 can u please explain how to do this

katen-ka-za [31]

1/4
first find lcm=4
second corporate it inti the fraction 1/2=2/4
third, subtract
3/4-2/4=1/4

6 0

4 years ago

Determine the x-intercept and y-intercept of the following linear equations

Blizzard [7]

Answer:

Step-by-step explanation:

the x intercept takes coordinate (x,0)

the y intercept takes coordinate (0,y)

x intercept y intercept

40: x+y=5 (5,0) (0,5)

x=0 , y=5, when y=0 x=5

41: x-y=5 (5,0) (0,-5)

x=0, -y=5 then y=-5, when y=0, x=5

42: 3x+4y=12 (4,0) (0,3)

x=0, 4y=12⇒y=12/4⇒y=3

y=0, 3x=12⇒x=12/3⇒x=4

43: 2x+3y=6 (3,0) (0,2)

x=0 , 3y=6⇒y=6/3=2

y=0 ,3y=6 ⇒ y=6/3 ⇒y=2

44: 3x+4y=-24 (-8,0) (0,-6)

x=0 , 4y=-24⇒y=-24/4 ⇒ y=-6

y=0 , 3x=-24⇒ x=-24/3⇒x=-8

45: 1/3x+2/3y=5/6 (5/2,0) (0,5/4)

x=0 , 2/3 y=5/6 ⇒12y=15 ⇒ y=15/12 ⇒y=5/4

y=0 , 1/3 x=5/6 ⇒6x=15 ⇒x=15/6 ⇒x=5/2

46: x=-2 (-2,0) no y intercept

it is vertical line , there is no y intercept

47: y=15 no x intercept (0,15)

horixzontal line, no x intercept

48: 3x-7y=8 (8/3,0) (0,-8/7)

x=0 , -7y=8 ⇒y=-8/7

y=0 , 3x=8 ⇒x=8/3

7 0

4 years ago