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34kurt
3 years ago
5

Please help please help please help please help please help please help

Mathematics
1 answer:
MrRa [10]3 years ago
4 0
I think it’s the last one
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3 years ago
Simplify the radical 7√7-2√28
Umnica [9.8K]

ANSWER

3 \sqrt{7}

EXPLANATION

The given radical is

7 \sqrt{7}  - 2 \sqrt{28}

Remove the perfect square from the second radical.

= 7 \sqrt{7}  - 2 \sqrt{4 \times 7}

= 7 \sqrt{7}  - 2 \sqrt{4}  \times  \sqrt{7}

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Pls help me solve this ​
sammy [17]

Answer:

4 kg of sugar would contain 1.2 \times 10^9 crystals.

Step-by-step explanation:

Given that 3kg of sugar contains 9 × 10⁸ crystals, let "x" represent the number of sugar crystals 4kg of sugar would contain.

Thus, set up a proportion as follows:

3 kg : 9 × 10⁸ = 4 kg : x

\frac{3}{9 \times 10^8} = \frac{4}{x}

Solve for x. Cross multiply.

3 \times x = 9 \times 10^8 \times 4

3x = 36 \times 10^8

3x = 3.6 \times 10^9

Divide both sides by 3

\frac{3x}{3} = \frac{3.6 \times 10^9}{3}

x = 1.2 \times 10^9

4 kg of sugar would contain 1.2 \times 10^9 crystals.

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3 years ago
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jok3333 [9.3K]

Answer: (9, 9)

Explanation:

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3 years ago
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