In a class of 30 children, 60 % are female. How many students are boys?

Mathematics

1 answer:

Alex Ar [27]3 years ago

5 0

Answer:

7 i think

Step-by-step explanation:

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Can I have help with this one asap?

sasho [114]

Answer:

In Δ CFD , CD is the LONGEST side.

Step-by-step explanation:

Here, the given Δ CSD is a RIGHT ANGLED TRIANGLE.

Now, as we know in a right triangle, HYPOTENUSE IS THE LONGEST SIDE.

So, in Δ CSD SD is the longest side as SD = Hypotenuse.

Now, an altitude CF is drawn to hypotenuse SD.

⇒ CF ⊥ SD

⇒ Δ CFD is a RIGHT ANGLED TRIANGLE with ∠ F = 90°

and CD as a hypotenuse.

⇒ In Δ CFD , CD is the LONGEST side.

Hence, CD is the longest side in the given triangle CFD.

6 0

3 years ago

Can you guys please help me with this. It is graded. Thanks.

telo118 [61]

The answer is C, $8.15

7 0

4 years ago

Read 2 more answers

Find square root of 144 by factorisation method

Nady [450]

$\huge \boxed{\mathbb{QUESTION} \downarrow}$

Find square root of 144 by factorisation method.

$\large \boxed{\mathbb{ANSWER\: WITH\: EXPLANATION} \downarrow}$

We can find the square root of 144 using the factorisation method. In this method, you need to factorise 144 first. Then, you'll get your answer in the form of prime factors. In this case, it's ⇨ 2 × 2 × 2 × 2 × 3 × 3.

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To find the square root using factorisation, we need to group the same number in pairs. That is, 2 × 2 × 2 × 2 × 3 × 3 by grouping same numbers in pairs will become ⇨ (2, 2), (2, 2), (3, 3).

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Now, you should take only 1 of the number from these groups. So, (2, 2), (2, 2), (3, 3) will change to ⇨ 2 × 2 × 3.

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Finally, just multiply this set of numbers to find the square root of 144. 2 × 2 × 3 = 4 × 3 = $\large\boxed{\underline{\bf \: 12}}$ ⇨ square root of 144.