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2 years ago

Could somebody help.

Mathematics

1 answer:

Marianna [84]2 years ago

8 0

The answer is 4/9.

To find the answer you would need to find the values of x and y. Using the given information you know x/5 is equal to 2/3. Then you would cross multiply and divide in order to fine the value of x, which is 10/3. Doing the same thing to find y, which would be 15/2. Since it’s day the ratio of x and y. You would divide the value of x by y to get your answer of 4/9.

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Find the value of x Show the work please thank you

lisov135 [29]

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Step-by-step explanation:

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2 years ago

0.1in has 4 threads how many threads are in 1 inch?

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1 year ago

A rod with the density sigma(x) = 3 + sin(x) lies on the x-axis between x=0 and x = 3pi/4 find the center of mass of the rod

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Answer:

10.7 grams

Step-by-step explanation:

hey there, again!

this is a similar process the mass is denisty*area HOWEVER keep in mind it's flat so the area is just x deltax while denisity is 3 + sin(x)

mass of rod = integral 0 to 3pi/4 of (3 + sin(x))*x deltax

= integral 0 to 3pi/4 of 3x + xsin(x) deltax

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3 years ago

What are the approximate area and circumference, respectively, of a circle with a diameter of 30 inches?

8_murik_8 [283]

Solution:

$\searrow$

Detailed explanation:

Here we need to find both the circumference and the area of a circle whose diameter is 30 in.

///\\\///\\\///\\\///\\\///\\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\\////\\\\////\\\\///\\\///\\\///\\\///

⚜ Circumference ⚜

This is the formula that we use for the circumference. $\large\texttt{$C=\pi d$}$ .

Here, C is the circumference,

$\pi$ is pi, *

d is the diameter

_____________

* The number pi is an irrational number. This means that no matter how hard we try, we cannot write this number as a fraction. The reason for that is: The number pi has never-ending digits after its decimal point.

To avoid getting never-ending numbers, we will use 3.14 for pi.

_____________

Alright, so now we just stick in the values.

$\boldsymbol{C=3.14\cdot30}$

$\boldsymbol{C=94.2\:inches}$

The circumference is successfully calculated.

///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\///\\\////\\\\///\\\///\\\///\\\//\\//\/\/\/\//\///\\//

⚜ Area ⚜

This is the formula we will use to work out the area.

$---\mapsto\boldsymbol{A=\pi r^2}$

Here,

A denotes the area

$\pi$ denotes pi

r denotes the radius (30/2=15, because the diameter is always two times the radius)

$\large\boldsymbol{\therefore,\;the\;radius\;is\;15}$

Once again, it's just a matter of sticking in the values.

$---\mapsto\boldsymbol{A=3.14\cdot15^2}$

Remember the Order of Operations!

P.E.M.D.A.S.

P=Parentheses

This operation tells us to evaluate all expressions in the parentheses first, if any are present.

E=Exponents

This one tells us to evaluate all expressions with exponents, if any are present.

M=Multiplication | D=Division

Unlike the two operations above, these two are completely interchangeable.

A=Addition | S=Subtraction

Like M and D, A and S are interchangeable.

_________________

Now let's simplify... According to P.E.M.D.A.S., we should square 15 first.

$---\mapsto\boldsymbol{A=3.14\cdot225}$

Now, we need to multiply.

$---\mapsto\boldsymbol{A=706.5\;square\;inches}$

8 0

1 year ago

Could somebody help.​

Could somebody help.