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3 years ago

For the set A ={} determine n(A) =

Mathematics

1 answer:

gogolik [260]3 years ago

8 0

The given set is A= {}

n(A) is wanting the count of numbers in the set.

The set has no numbers so the answer should be 0

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Elis [28]

C because the relation acts as a function no mater the 2 items

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3 years ago

What is the image point of (-6,3) after a translation right 5 units and down 3 units?

kobusy [5.1K]

Answer:
(-1,0)
step-by-step explanation:
(-6,3)
right 5
(-1,3)
down 3
(-1,0)

6 0

3 years ago

The price of a dress is reduced by 25%.When the dress still does not sell, it is reduced by 25% of the reduced price. If the

fredd [130]

18= (d - 0.25d) - 0.25d
18= 0.75d - 0.25d
18= 0.50d
d = 36

the original price was $36

8 0

3 years ago

A walkway forms one diagonal of a square playground. The walkway is 14 m long. How long is a side of the playground?

Vilka [71]

Answer: The side of the playground is around 10 meters long

Step-by-step explanation:

use the diagonal as the hypotenuse of a right triangle, where the sides of the square form the legs of said triangle.

Usually

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

since we know a and b are the same length (sides of a square are congruent) we would have

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

We know that c is 14 so

$2a^{2} =14^{2} \\2a^{2} =196\\a^{2} =98\\a=\sqrt{98} \\a= 9.999$

5 0

2 years ago

Find

Westkost [7]

Answer:

dy/dx = -b/a cot α

Step-by-step explanation:

x² / a² + y² / b² = 1

Take derivative with respect to x.

2x / a² + 2y / b² dy/dx = 0

2y / b² dy/dx = -2x / a²

dy/dx = -b²x / (a²y)

Substitute:

dy/dx = -b²a cos α / (a²b sin α)

dy/dx = -b cos α / (a sin α)

dy/dx = -b/a cot α

8 0

3 years ago