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Ratling [72]
3 years ago
9

In a school, 2/3 of the students study a language.

Mathematics
1 answer:
ddd [48]3 years ago
6 0

Answer:

4 : 11

Step-by-step explanation:

Given that:

Fraction of language students = 2/3

Number of students who study French :

2/5 of 2/3

2/5 * 2/3 = 4 /15

Those who do not study French :

Total fraction of entire student :

1 - 4/ 15

(15 - 4) / 15

11/15

Ratio of French to non-french

4/15 : 11/15

4/15 ÷ 11/15

4/15 * 15/ 11

4 / 11

4 : 11

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The minute hand of a clock is 9 inches long. how far does the tip of the minute hand move in 40 minutes​
GarryVolchara [31]

\text{The minute hand of a clock is 9 inches long.}\\
\text{we need to find the distance traveled by the tip of the minute }\\
\text{hand moved in 40 minutes.}

\text{That is we need to find the length of the arc formed by the minute}\\
\text{hand in 40 minutes. We know that in one complete revolution of the}\\
\text{minute hand there are 60 minutes. so the central angle formed by the }\\
\text{minute hand in 40 minutes is}=\frac{40}{60}*2\pi =\frac{4\pi}{3} \text{ radians}\\
\\
\text{hence using the arc length formula, }s=r\theta, \text{ we get}\\
\\
\text{distance traveled by the tip}=9\times \frac{4\pi}{3}=12\pi\approx 37.7 \text{ inches}

Hence the tip of the minute hand moved approximately 37.7 inches in 40 minutes.

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3 years ago
hi! like almost everyone else on here, I'm probably gonna fail so uh help, please? In your own words explain how to multiply/div
Radda [10]

Answer:

It does not matter whether you multiply the radicands or simplify each radical first. You multiply radical expressions that contain variables in the same manner. As long as the roots of the radical expressions are the same, you can use the Product Raised to a Power Rule to multiply and simplify.

Step-by-step explanation:

6 0
3 years ago
Ax +3= 6<br> Solve for x.
k0ka [10]

Answer:

Step-by-step explanation:

Let's solve for a.

ax+3=6

Step 1: Add -3 to both sides.

ax+3+−3=6+−3

ax=3

Step 2: Divide both sides by x.

ax /x = 3 /x

a= 3 /x

Answer:

a= 3 /x

 

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Step-by-step explanation:

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3 years ago
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I need some help with this question​
VashaNatasha [74]

Answer:

(7w + 9x)(7w - 9x)

Step-by-step explanation:

 Given expression;

        49w²  - 81x²

Now to solve the problem;

         49w² - 81x² = 7²w² - 9²x²

                           

Using differences of two squares;

        x²  - y²   = (x + y)(x - y)

So;

7²w² - 9²x²  = (7w + 9x)(7w - 9x)

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