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2 years ago

Help me pls Isbaksbaosbvshshs

Mathematics

2 answers:

Ilia_Sergeevich [38]2 years ago

6 0

9514 1404 393

Answer:

3. 84 km

4. y = 3/4x

Step-by-step explanation:

3. The map and ground distances can form a proportion:

ground distance / map distance = 24 km / (2 cm) = x / (7 cm)

Multiplying by 7 cm gives ...

x = (24 km)(7/2) = 84 km

The actual distance is 84 km.

4. We notice that y (9) is less than x (12), so the multiplier of x must be less than 1. The appropriate equation is ...

y = 3/4x

Jobisdone [24]2 years ago

5 0

Answer:

Step-by-step explanation:

The answer is 84. Every 2cm is 24km. 6cm=72 1cm=12

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2 years ago

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2 years ago

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2 years ago

Write the following quotient in the form a+bi.<br> -7i/2-7i

Helga [31]

Answer:

$\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}$

Step-by-step explanation:

$\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i$