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Harlamova29_29 [7]
3 years ago
10

ILL GIVE BRAINLIEST AND 50 POINTS PLS help

Mathematics
1 answer:
serious [3.7K]3 years ago
4 0

Answer: 2

bc 50+20=70

140 divided by 70 is 2

Step-by-step explanation:

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How do you simplify 4/20
Anna71 [15]
\sf \frac{4}{20}~\underrightarrow{\sf ~simplify~by~4~~}~\frac{4:4}{20:4} =\boxed{\sf  \frac{1}{5} }
3 0
3 years ago
Read 2 more answers
The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30​, and the sample statistics
IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

H_a: p

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= \hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31

The test statistic for proportion is given by :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

Substitute all the values , we get

z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84

Hence, the value of the test statistic = 0.84

6 0
3 years ago
Em 1 Graph the system of equations. { x−y=6 ,4x+y=4
muminat

Graphing the system of equations is shown in figure attached.

Solution set is (2,-4). The lines will intersect at (2,-4)

Step-by-step explanation:

We need to graph the system of equations. x-y=6 ,4x+y=4

First we will find value of x and y

Let:

x-y=6\,\,eq(1)\\4x+y=4\,\,eq(2)

Add eq(1) and eq(2)

x-y=6\,\,\\4x+y=4\,\,\\------\\5x=10\\x=10/5\\x=2

Putting value of x in eq(1) and finding y

x-y=6\\2-y=6\\-y=6-2\\-y=4\\y=-4

So, y=-4

Graphing the system of equations is shown in figure attached.

Solution set is (2,-4). The lines will intersect at (2,-4)

Keywords: System of equations

Learn more about system of equations at:

  • brainly.com/question/9045597
  • brainly.com/question/3739260
  • brainly.com/question/13168205

#learnwithBrainly

8 0
3 years ago
Name an equivalent ratio for with a denominator of 8.
const2013 [10]

Answer:

(A)

Step-by-step explanation:

4+4=8,4/8 is an equalivent ratio. So the best answer would be A!

Hope this helps:)!

6 0
2 years ago
Help please<br> will give brainliest
FromTheMoon [43]
The tangent line is perpendicular to the radius from the center of the circle to the point of tangency. 
ΔDCE is similar to ΔDBA
DC/DB=DE/DA
15/50=DE/40
DE=12 
3 0
3 years ago
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