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Marrrta [24]
3 years ago
15

What is 3957 hours in minutes

Mathematics
1 answer:
scZoUnD [109]3 years ago
6 0
60 minutes in an hour...so
3957*60=237420
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Solve for x and y 1/(x+yi) + 2/(x-yi) = 1+i
aliina [53]

Answer:

Step-by-step explanation:

x+i*y≠0 ==> x≠0 and y≠0

x-i*y≠0 ==> x≠0 and y≠0

We must exclude (0,0) as solution.

\dfrac{1}{x+i*y} +\dfrac{2}{x-i*y} =1+i\\\\\dfrac{1*(x-i*y)}{(x+i*y)(x-i*y)} +\dfrac{2*(x+i*y)}{(x-i*y)(x+i*y)} =1+i\\\\\\\dfrac{x-i*y+2x+2i*y}{x^2+y^2} =1+i\\\\3x+i*y=(1+i)(x^2+y^2)\\\\3x+i*y=(x^2+y^2)+i(x^2+y^2+i*(x^2+y^2)\\\\\left\{\begin{array}{ccc}3x&=&x^2+y^2\\y&=&x^2+y^2\\\end {array}\right.\\\\\\\left\{\begin{array}{ccc}y&=&3x\\3x&=&x^2+9x^2\\\end {array}\right.\\\\\\\left\{\begin{array}{ccc}y&=&3x\\x(10x-3)&=&0\\\end {array}\right.\\\\

\left\{\begin{array}{ccc}x&=&0\\y&=&0\\\end {array}\right.\ (to\ exclude) \ or \ \left\{\begin{array}{ccc}x&=&\dfrac{3}{10}\\\\y&=&\dfrac{9}{10}\\\end {array}\right.\\\\Sol=\{(\dfrac{3}{10},\dfrac{9}{10})\}\\

4 0
3 years ago
Whats the difference -6-(11)
katen-ka-za [31]
The answer should be -17
7 0
3 years ago
Which fraction is not in simplest form?<br> 10/21
azamat
It’s 4/6 the last one
7 0
3 years ago
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Find the values of x and y.
sp2606 [1]
The answer to this is D. 
3 0
3 years ago
Kirin is designing a doghouse. The base of the doghouse will be made of wood and shaped like a rectangle with a half-circle on e
eduard

Answer:

Each length with one mark (I) is 36 inches.

Each length with two marks (II) is 18 inches.

Each length with three marks (III) is 30 inches.

Each end has a height (from the highest point to the lowest point) of 28 inches.

The doghouse will have the shape shown once it is built.

Part A

If Wendell were to slice the doghouse in half with a slice parallel to the pentagonal bases, what shape would the slice be?

Answer:

Part B

If Wendell were to slice the doghouse with a plane parallel to the two sides through any section

of the doghouse, what shape would the slice be?

Answer:

Part C

If Wendell were to slice the doghouse with a plane parallel to the bottom through any section of

the doghouse, what shape would the slice be?

Answer:

Part D

Wendell plans to paint the doghouse after it's built. He wants to know what the surface area of

the outside of the doghouse will be. To find the surface area, first break up any composite shapes

into rectangles and triangles. Which shape is considered a composite shape? When the shape

is decomposed, what are the dimensions of the resulting shapes necessary for finding surface

area?

Part E

using the results from part D and the dimentions of the other surfaces, find the surface area of the outside of the doghouse. be sure to include the bottom surface in your calculation.

Answer:

Part F

Wendell is curious how much space Jordan will have inside the doghouse to move around in. what is the volume of the dog house?

Answer:​

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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