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3 years ago

Evaluate this expression 1/3 x 4 x 9 x 1/2

Mathematics

2 answers:

wlad13 [49]3 years ago

8 0

Answer:

Step-by-step explanation:

You would first do 1/3 x 4 = 1.333....

Then you have 1.333.... Then you would x 9 = 12

And then it would be 12 x 1/2 = 6

sveticcg [70]3 years ago

4 0

Answer:

Step-by-step explanation:

1/3 x 4 = 1.333....

1.333.... x 9 = 12

12 x 1/2 = 6

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Find the value of xxx in the isosceles triangle shown below.

Ivahew [28]

Answer:

$x=10\ units$

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The height of an isosceles triangle divide the triangle into two congruent right triangles.

Applying the Pythagorean Theorem

$(\sqrt{74})^2 =7^2+(\frac{x}{2})^2$

solve for x

$74 =49+\frac{x^2}{4}$

$\frac{x^2}{4}=74-49$

$\frac{x^2}{4}=25$

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3 years ago

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3 years ago

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A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2

Yuliya22 [10]

A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2 and 5.1.

Answer: The correct option is B) about 34%

Proof:

We have to find $P(4.2$

To find $P(4.2$ , we need to use z score formula:

When x = 4.2, we have:

$z = \frac{x-\mu}{\sigma}$

$=\frac{4.2-5.1}{0.9}=\frac{-0.9}{0.9}=-1$

When x = 5.1, we have:

$z = \frac{x-\mu}{\sigma}$

$=\frac{5.1-5.1}{0.9}=0$

Therefore, we have to find $P(-1$

Using the standard normal table, we have:

$P(-1$ = $P(z$

$=0.50-0.1587$

$=0.3413$ or 34.13%

= 34% approximately

Therefore, the percent of data between 4.2 and 5.1 is about 34%

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4 years ago

A rectangle with an area of 3990 cm2 is x centimeters wide and (x+4) centimeters long. To the nearest tenth of a centimeter, the

Karolina [17]

Answer: width:60.2 cm

Length: 64.2 cm

Step-by-step explanation:

Given

The area of the rectangle is $3990\ cm^2$

Width of the rectangle is $x\ cm$

Length of the rectangle is $x+4\ cm$

Area of the rectangle is the product of length and width

$\therefore 3990=(x+4)x\\\Rightarrow 3990=x^2+4x\\\Rightarrow x^2+4x-3990=0\\\Rightarrow x=60.198\ or\ -65.198\ cm\\\text{Neglecting negative term}\\\Rightarrow x=60.198\approx 60.2\ cm$

Width of the rectangle is $60.2\ cm$

Length of the rectangle is $60.2+4=64.2\ cm$

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3 years ago

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Paul [167]

4% Of 75 is 3 so yeah the answer to your question is 3

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3 years ago

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