Which of the following is the solution to the inequality below?-5x - 10 < 20 ?

1) x > -6
2) x > - 2
3) x < -6
4) x< -2

Answers

Answer 1

Answer: Add 10 to both sides.

This gives us -5x < 30.

Now divide both sides by -5.

When you divide both sides of
an inequality by a negative, switch
the direction of the inequality symbol.

So we have x > -6.

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Find the standard deviation of the data set shown. Round your answer to the nearest tenth.4,5,9,1,2,5

The standard deviation is about_________

Answers

Mark Brainliest Please

Answer:

Answer is gicen in the image attached.

Step-by-step explanation:

Standard deviation (SD) measured the volatility or variability across a set of data. It is the measure of the spread of numbers in a data set from its mean value and can be represented using the sigma symbol (σ). The following algorithmic calculation tool makes it easy to quickly discover the mean, variance & SD of a data set.

For more help check Khan academy video

https://www.khanacademy.org/math/statistics-probability/displaying-describing-data/sample-standard-deviation/v/sample-standard-deviation-and-bias

Answer:

2.6

Step-by-step explanation:

To calculate standard deviation:

(1) Find the mean - 4.33

4 + 5 + 9 + 1 + 2 + 5 = 26 26 / 6 = 4.333... ≈ 4.33

(2) Subtract the mean from each value and square each result

$(4 - 4.33)^2 = 0.1089$ $(5 - 4.33)^2 = 0.4489$ $(9 - 4.33)^2 = 21.8089$

$(1 - 4.33)^2 = 11.0889$ $(2 - 4.33)^2 = 5.4289$ $(5 - 4.33)^2 = 0.4489$

(3) Find a new mean with the new values from the previous step

0.1089 + 0.4489 + 21.8089 + 11.0889 + 5.4289 + 0.4489 = 39.3334

39.3334 / 6 = 6.555566667

(4) Take the square root of the new mean.

$\sqrt[]{x6.555566667} =2.560384086$

2.560384086 rounded to the nearest tenth is: 2.6

What is 95 percent of 240

Answers

228. Hope it helps :)

228 is the correct answer

The value of a boat, in dollars, x years after its purchase is represented by the function.f(x)=10,000(0.73)^x

What is the average decrease in value per year between years 1 and 2?

Answers

Given the function f(x) = 10000(0.73)^x

Where y is The value of a boat, in dollars, x years after its purchase
at x = 1
f(1) = 10000(0.73)^1
f(1) = $7300
at x = 2
f(2) = 10000(0.73)^2
f(2) = $ 5329
so the decrease
D = $7300 - $ 5329
D = $ 1971

Answer:

The correct answer is $1971.

I just took the test and got it right.

PLEASE HELP ME !!!The height of the pyramid in the diagram is three times the radius of the cone. The base area of the pyramid is the same as the base area of the
cone. What is the expression for the volume of the pyramid in terms of the radius r of the cone?

base area for cone= B
base area for pyramid= B, 3r heigh

A. V = pi r³
B. V = 1/3 pi r²
C. V = 2 pi r²
D. V = 1/9 pi r³
E. V = 3 pi r³