Solve the system and determine the best method to solve each system of equations

Mathematics

1 answer:

Phoenix [80]4 years ago

8 0

I forgot what its called, but its the one where you make one equation negative ,making a +7 and a -7 and you subtract the equations down

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Please, please , please help.

topjm [15]

Answer:

60,120,180

3,6,9

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

If f(x)=x^2 is horizontally compressed to g(x), which could be the equation of g(x)?

leva [86]

For the definition of horizontal compression, the function f(x) = x² is horizontally compressed to the function g(x) = (k · x)², for 0 < k < 1.

<h3>How to find the resulting equation after applying a compression</h3>

Here we must narrow a given function by a rigid operation known as compression. Rigid transformations are transformations in which Euclidean distances are conserved. In the case of functions, we define the horizontal compression in the following manner:

g(x) = f(k · x), for 0 < k < 1 (1)

If we know that f(x) = x², then the equation of g(x) is:

g(x) = (k · x)², 0 < k < 1

For the definition of horizontal compression, the function f(x) = x² is horizontally compressed to the function g(x) = (k · x)², for 0 < k < 1.

To learn more on rigid transformations: brainly.com/question/1761538

#SPJ1

5 0

2 years ago

Find the length of PQ. Round to the nearest hundredth.

Art [367]

Angle R is the reference angle as its the only given angle (other than the 90 degree angle).

Opposite angle R is segment PQ
PR is the hypotenuse

Use the sine rule to find that...
sin(angle) = opposite/hypotenuse
sin(R) = PQ/PR
sin(19) = PQ/11
11*sin(19) = PQ
PQ = 11*sin(19)
PQ = 3.58124969902872 <<-- use a calculator (degree mode)
PQ = 3.58

Answer: 3.58

6 0

3 years ago

A poll conducted in 2013 found that 52% of u.s. adult twitter users get at least some news on twitter.40. the standard error for

FinnZ [79.3K]

The 99% confidence interval for the population proportion is given by

$sample \ proportion \pm 2.575\times standard \ error$

Given that 52% = 0.52 is the standard proportion and the standard error is 2.4% = 0.024.

Therefore, the 99% confidence interval for the fraction of u.s. adult twitter users who get some news on twitter is given by

$0.52\pm2.575\times0.024=0.52\pm0.0618=(0.4582, \ 0.5818)$

Therefore, the 99% confidence interval for the fraction of u.s. adult twitter users who get some news on twitter is 45.82% and 58.18%.

The interpretation of the confidence interval is as follows: "We are 99% confident that the fraction of U.S. adult twiter users who get some news on twitter is between 45.82% and 58.18%.

3 0

4 years ago

(3.01)

tigry1 [53]

The best and most reasonable answer would be C!

Please give me the brainliest answer :)

8 0

3 years ago