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Sphinxa [80]
3 years ago
11

Y−3=2(x+1) What is the solution (-1,_)

Mathematics
1 answer:
aev [14]3 years ago
4 0

Answer:

(-1,3)

Step-by-step explanation:

hello :

y−3=2(x+1)

if x= -1       y-3 = 2(-1+1)

y-3=0   so : y=3

(-1,3)

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A string of length if meter is cut into 6 equal pieces. What is the
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Answer:

1/3

Step-by-step explanation:

2/6=1/3

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2 years ago
The hourly wages of a sample of 130 system analysts are given below.
atroni [7]

Answer: b. 30%

Step-by-step explanation:

  • A measure of relative variability is known as coefficient of variation. It is the ratio of the standard deviation to the mean.

i.e. CV=\dfrac{\sigma}{\mu}

Given: mean =  \mu=90

Variance = \sigma^2 = 729

\sigma=\sqrt{729}=27

Now, CV=\dfrac{27}{90}=0.3

in percent , CV= 0.3\times100\%= 30\%

Hence, correct option is  b. 30%.

8 0
2 years ago
2.) If a researcher uncovers a relationship between class (independent variable) and prejudice (dependent variable), what can be
nirvana33 [79]

Answer:

Step-by-step explanation:

Correlation measures the strength of the linear relationship between two variables.

A linear relationship exists between two variables if one variable increases as the other increases or decreases.

Use the formula for correlation coefficient to determine the strength of the relationship.

Correlation coefficient, r is equal to the sum of squares of xy divided by the product of the square root of the sum of squares of xx and xy.

The sample correlation coefficient r measures the strength of the linear relationship and has the following properties:  

-1≤r≤1; the closer the value is to −1 or 1, the stronger the linear relationship  

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– If r is positive, this indicates that both variables are increasing or both variables are decreasing  

If r = 0, then there is no linear relationship between the two variables  

5 0
2 years ago
13) Ayla's lunch bill was $8.70 and Harley's was $10.30. The girls' uncle paid
Otrada [13]

Answer:

$2.85

Step-by-step explanation:

First, add the bill up ($8.70 + $10.30 = 19). So now you need to find what 15% of $19 is...To find the percentage of something you need to turn it into a decimal, 0. (whatever the percentage number is). So in this case, 19 times 0.15, which is a tip of $2.85.

5 0
2 years ago
Read 2 more answers
Which are true if figure DEFG is reflected across the x-axis? Check all that apply.
meriva

Answer: The correct options are 1,2 and 3.

Explanation:

If a figure reflected across the x-axis then the x-coordinate remains same but the sign of y-coordinate changes.

According to the reflection rule across the x-axis,

(x,y)\rightarrow(x,-y)

From the given figure it is noticed that the coordinate of point D(0,4) and E(-2,0).

After reflection,

D(0,4)\rightarrow D'(0,-4)

E(-2,0)\rightarrow E'(-2,0)

Therefore the option 1 and 2 are correct.

From the given figure it is noticed the distance of point G from the x-axis is 2, therefore the distance from the G' to x-axis is also 2, because the distance of preimage and image are equal from the line of reflection.

Therefore, the option 3 is correct.

From the given figure it is noticed the distance of point D from the x-axis is 4, therefore the distance from the D' to x-axis is also 4.

Therefore, the option 4 is incorrect.

From the below figure it is clearly noticed that the orientation will not be preserved. Because the sides are not equal, so the reflection will change the orientation.

7 0
3 years ago
Read 2 more answers
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