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3 years ago

Write the sum or difference in the standard form a + bi.

Mathematics

1 answer:

REY [17]3 years ago

8 0

Answer:

Sum = 13+ 4i Difference = -5 - 8i

Step-by-step explanation:

Given complex number as (4 -2i) and (9 + 6i)

Sum of these complex number is

(4 -2i) + (9 + 6i) = ( 4 +9) + (6i -2i)

= 13 +4i

Difference of these complex number is

(4 -2i) - (9 + 6i) = (4 -9) - (2i +6i)

= -5 - 8i

Hence the sum and Difference of given complex numbers are

Sum = 13+ 4i Difference = -5 - 8i Answer

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mote1985 [20]

Answer:

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2 years ago

Zinaida [17]

$b. \: \frac{8}{27}$

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2 years ago

Find the with of a triangle as a 15 cm high in a hypogynous of a 19 cm

Inessa05 [86]

Answer:

This other side of the triangle is equal to about 11.7 cm

Step-by-step explanation:

In order to find out the third side of the triangle we will just use the Pythagoras Theorem.

$c^{2} =a^{2} + b^{2}$

Since we know the hypotenuse and we know one of the legs, in order to find the second leg we just substitute the values and solve the equation and so we get...

$c^{2} =a^{2} + b^{2}\\19^{2} = 15^{2} + b^{2}\\361 = 225 + b^{2} \\$

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And so b ≈ 11.66190

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2 years ago

Describe what pie is and explain how it Is used in finding the circumference of a circle

irakobra [83]

Answer:

Step-by-step explanation:

Pi is the ratio of a circle's circumference to its diameter.

The circumference = π * the diameter of the circle (Pi multiplied by the diameter of the circle)

Hope this helps!

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2 years ago

Ms. Bezel, the jewelry designer, ordered 500 grams of silver, 800 grams of brass, and 700 grams of copper. How many kilograms of

jeka94

Answer:

2 kilograms

Step-by-step explanation:

500 + 800 + 700 is 2000g

There are 1000 grams in a kilogram

so the answer is 2 kilograms

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3 years ago