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snow_tiger [21]
2 years ago
6

Will mark brainliest for whoever answers correctly

Mathematics
1 answer:
Veronika [31]2 years ago
4 0

Answer:

The answer is 2

Step-by-step explanation:

x+y = (1+i) + (1-i)

open the bracket...

1+i + 1-i

collect like terms

=1+1+i-i

= 2-0

=2

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A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind. Find the speed of the wind
Lunna [17]

Given:

A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind.

Pilot's speed in still air is 315 miles per hour.

To find:

The speed of the wind.

Solution:

Let the speed of wind be x miles per hour.

Speed with wind = 315+x miles per hour

Speed against wind = 315-x miles per hour

We know that,

Time=\dfrac{Distance}{Speed}

According to the question,

\dfrac{450}{315+x}=\dfrac{360}{315-x}

Divide both sides by 90.

\dfrac{5}{315+x}=\dfrac{4}{315-x}

By cross multiplication, we get

5(315-x)=4(315+x)

5(315)-5x=4(315)+4x

5(315)-4(315)=4x+5x

(5-4)315=9x

Divide both sides by 9.

\dfrac{(1)315}{9}=x

35=x

Therefore, the speed of wind is 35 miles per hour.

4 0
3 years ago
Maria believes she will get 1 hit in 20% of her softball games, 2 hits in 25% of her games, 3 hits in 50% of her games, and 4 hi
Makovka662 [10]
I would put 2 as the answer
4 0
3 years ago
What is the area of `DeltaXYZ`? A. 10 square inches B. 14 square inches C. 17.5 square inches D. 28 square inches
xz_007 [3.2K]

Answer:

17.5

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
What is a rational number
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Rational numbers are a giant group of numbers in mathematics. Basically, rational numbers are all numbers that can be written as a fraction. The set of rational numbers includes many subsets of numbers which are provided in the image.

7 0
3 years ago
Emma is making a scale drawing of her farm using the scale 1cm = 2.5ft. In the drawing she drew a well with a diameter of 0.5 ce
Y_Kistochka [10]
Scale : 1 cm = 2.5 ft

1 cm = 2.5 ft
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Answer: 3.93 ft
8 0
3 years ago
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