3 years ago

7 meters/20 minutes= x cm/2 hours

Mathematics

1 answer:

meriva3 years ago

4 0

Answer:4,200

Step-by-step explanation:

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Given that <img src="https://tex.z-dn.net/?f=z%3Dx%2Biy" id="TexFormula1" title="z=x+iy" alt="z=x+iy" align="absmiddle" class="l

Mnenie [13.5K]

Answer:

$z= 5-2i$

Step-by-step explanation:

Start replacing!

$(x+iy) + 4i (x-iy) = -3+18i \\ x+iy +4ix -4i^2 y = -3 + 18i \\\\x + i (4x+y) +4y = -3 + 18i\\x+4y + (4x+y) i = -3 + 18i$

Now two complex numbers are equal if both the real and imaginary parts are equal, which gives you the system of equation $\left \{x+4y=-3} \atop {4x+y=18} \right.$

Pick any method to solve it and you'll get $x=5, y= -2$

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3 years ago

When a number is decreased by 23, the result is -9. find the number

Akimi4 [234]

14
subtract 9 from 23. you get 14, 14-23=-9

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3 years ago

Note: Figure is not drawn to scale.

Vadim26 [7]

A. If you disassemble the shapes and add the numbers, you can get the answer :).

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3 years ago

Can you someone help me

lord [1]

(6,8) is the answer also this could be the answer too (6,2)

hope this helps

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3 years ago

Simplify by combining like terms: 3x + 3x + 3x

9966 [12]

The answer is 9x when you combine like terms

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3 years ago

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