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3 years ago

Tell what property or properties are shown. (5 + 23) + 21= 5+ (23 + 21)

Mathematics

1 answer:

Verizon [17]3 years ago

4 0

Answer:

Yuhh the answers c dawhggg trus me i just did the same thing lawl!

Step-by-step explanation:

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I need help it says to use 3.14 PI

aliya0001 [1]

Answer:

Step-by-step explanation:

$\text{We have a rectangle of 100 by 50 and half a circle with a radius of 25.}\\ \\ A=100(50)+3.14(25^2)\\ \\ A\approx 6962.5\ m^2$

8 0

3 years ago

A coin is flipped 150 times. The results of the experiment are shown in the following table:

MakcuM [25]

First problem:

The answer is C because theoretically it should have a 50% of landing heads but instead it lands heads 56% of the time. Thus this is 6% higher than 50%. It's not D because there is not specified detail of how the person got this data so you can assume that the person did a fair survey/data collection.

Second problem:

So in a data size of 490, 140 of them we trout. This means that 140/490 or 28.57% of the fish are trout. This means that in a sample size of 5000 fish, 5000*0.2857 or 1428.57 are trout.

Third problem:

The Science students seem to have a higher average score because the average score of Math students are:
(32+33+34+34+35+37+39+40+40)/9=36
average score of Science students are:
(41+42+43+43+46+46+47+49+49)/9=45.111

7 0

3 years ago

Samantha’s rectangular gift is 10 inches. by 12 inches and is framed with a ribbon. She wants to use the same length of ribbon t

yanalaym [24]

<u>Answer:</u>

7 inches

<u>Step-by-step explanation:</u>

The dimension of the rectangular gift is 10 by 12 inches so let us find the perimeter of this rectangle.

Perimeter of rectangular gift = 2 (L+ W) = 2 (10 +12) = 44 inches

Since we are to use the same length of ribbon to wrap a circular clock so the perimeter or circumference of the clock should be no more than 44 inches.

$2\pi r=44$

$r=\frac{44}{2\pi }$

$r=7.003$

Therefore, the maximum radius of the circular clock is 7 inches.

7 0

3 years ago

Read 2 more answers

Cramer's rule:

Irina18 [472]

Answer:

$a. \quad\dfrac{\left|\begin{array}{cc}148&14\\246&5\end{array}\right|}{\left|\begin{array}{cc}-2&14\\3&5\end{array}\right|}=52$

Step-by-step explanation:

To find the value of x, Cramer's rule says you replace the x-coefficients with the equation constants to form the matrix whose determinant is the numerator of the fraction. The denominator is the determinant of the matrix of coefficients. The equation constants are 148 and 246, so you expect to find those in the first column of the numerator (answer choices A and C).

$\dfrac{\left|\begin{array}{cc}148&14\\246&5\end{array}\right|}{\left|\begin{array}{cc}-2&14\\3&5\end{array}\right|}=\dfrac{-2704}{-52}=52$

The calculation is carried out correctly only in answer choice A.

5 0

3 years ago

Express 60% as a decimal<br> a. 0.4 b. 0.06 c. 0.65 d. 0.6 please explain

Law Incorporation [45]

<h2>Answer: D. 0.6</h2>

Step-by-step explanation:

4 0

3 years ago