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3 years ago

Please help me out! I have lots of work to do and if you help it will relieve the stress.

Mathematics

1 answer:

Nina [5.8K]3 years ago

3 0

Answer:

<h2>2. Combining old and new observations.</h2>

Step-by-step explanation:

Through the passage, Nicholas Copernicus is introducing to the reader a new worlds, based on observations from the pass, and recent observations made by scientists. Basically, he's talking about a work where the reader is going to able to learn and be aware about the stars and planets movements in a way that no one could imagine before.

Copernicus specifically states that those observations are based on ancient and new data.

Therefore, the right answer is 2, because it's a combination of old and new observations.

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What ordered pair is a solution to y = x + 5 and x - 5y = -9? I also need to show the work.

Margarita [4]

Answer:

(- 4, 1 )

Step-by-step explanation:

Given the 2 equations

y = x + 5 → (1)

x - 5y = - 9 → (2)

Substitute y = x + 5 into (2)

x - 5(x + 5) = - 9 ← distribute and simplify left side

x - 5x - 25 = - 9

- 4x - 25 = - 9 ( add 25 to both sides )

- 4x = 16 ( divide both sides by - 4 )

x = - 4

Substitute x = - 4 into either of the 2 equations and evaluate for y

Substituting into (1)

y = - 4 + 5 = 1

Solution is (- 4, 1 )

3 0

3 years ago

A phenomenon is observed many, many times under identical conditions. The proportion of times a particular event A occurs is rec

Sever21 [200]

Answer:

A. The probability of event A

Step-by-step explanation:

The proportion of times a particular event A occurs is known as the probability of event A because the probability is the measure of uncertainty and by definition probability is calculated as

P(x)=X/n

where

P(x) is the probability of occurring of random variable X

X=number of favorable outcomes

and

n= total number of outcomes.

Thus, the proportion of times a particular event A occurs is known as the probability of event A.

6 0

2 years ago

What is the value of y when x= -1 ?

stellarik [79]

Answer:

If y = x then when x = -1 then y = -1

Step-by-step explanation:

6 0

2 years ago

Simplify these expression 45m divide by 5 22t x 4s 121x divide by 11 12p x 12r

lara31 [8.8K]

45m/5 = 9m

22t·4s = 88st

121x/11 = 11x

12p·12r = 144pr

theses are too basic to really show work.

3 0

2 years ago

The rectangle below has an area of x^2-6x-7 square meters and a width of x-7 meters

Illusion [34]

Complete Question:

The rectangle below has an area of x^2-6x-7 square meters and a width of x-7 meters. What expression represents the length of the rectangle?

Answer:

<h3>The expression represents the length of the rectangle is (x + 1) meter</h3>

Solution:

Given that,

$\text{Area of rectangle} = x^2 - 6x - 7 \\\\Width = x - 7$

TO FIND: LENGTH = ?

We know that,

$Area\ of\ rectangle = length \times width \\\\Therefore\\\\x^2 - 6x - 7 = length \times x - 7\\\\length = \frac{x^2 - 6x - 7 }{x - 7 }\\\\length = \frac{(x-7)(x + 1)}{x - 7}\\\\\text{cancel out x-7 from numerator and denominator} \\\\length = x + 1$

Thus expression represents the length of the rectangle is (x + 1) meter

8 0

3 years ago