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Lady_Fox [76]
3 years ago
11

I need lots of help so please help me

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
7 0

The painting's original price was $3,500.

Step-by-step explanation:

Step 1:

The price now is $500 lesser than 3 times the original price. So

The current selling price = (3 × original price) - $500.

If the current selling price is y and the original price is x, then

y = 3x-500.

Step 2:

For this question, we have y = 10,000. Substituting this in the equation, we get

10,000 = 3x - 500, 3x = 10,500, x = \frac{10,500}{3} = 3,500.

So the original price of the classic painting was $3,500.

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In this problem, we explore the effect on the standard deviation of adding the same constant to each data value in a data set. C
aliya0001 [1]

Answer:

3.6661

3.6661

A, Adding a constant does nothing to the standard deviation

Step-by-step explanation:

I'm gonna assume s=standard deviation

The standard deviation is just the square root of the second moment minus the first moment squared

Because we were not told otherwise I think it's pretty safe to assume that all events are equally likely

Let's start by calculating the first moment (AKA The mean)

1/5(8+16+14+8+16)= 12.4

Let's then find the second moment

1/5(8²+16²+14²+8²+16²)= 167.2

√(167.2-12.4²)=3.6661

b.

While I could just tell you that adding something to the standard deviation (and the variane as well) doesn't do anything let's calculate it for fun

same process

.2(16+24+22+16+24)= 20.4

.2(16²+24²+22²+16²+24²)=429.6

√(429.6-20.4²)= 3.6661

6 0
3 years ago
What is x in this equation .3=.5x-.7
NARA [144]

By solving the linear equation it can be obtained that

The value of x is 2

What is a linear equation?

At first it is important to know about equation

Equation shows the equality between two algebraic expressions by connecting the two algebraic expressions by an equal to sign.

A one degree equation is known as linear equation.

The given linear equation is

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0.5x = 0.3 + 0.7

0.5x = 1

x = \frac{1}{0.5}

x = 2

The solution of this linear equation is x = 2

To learn more about linear equation, refer to the link-

brainly.com/question/28732353

#SPJ1

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