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tino4ka555 [31]
3 years ago
8

Real numbers are (closed/not closed) under multiplication.

Mathematics
1 answer:
Sveta_85 [38]3 years ago
7 0

thanks tho

<u>next time use ur head</u> Step-by-step explanation:

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Find the values of a.b,andc in the table a= b= c=.
Svetach [21]

Answer:

a. is 1 and b is 2 and c is 3 I did it in algebra pay attention in class

4 0
2 years ago
Find the volume V of the described solid S. The base of S is the triangular region with vertices (0, 0), (3, 0), and (0, 3). Cro
Reil [10]

Answer:

27/2

Step-by-step explanation:

Given

Vertices (0, 0), (3, 0), and (0, 3)

Since the base of the equilateral in the plane perpendicular to the x-axis goes from the x-axis to the line y = 3 - x.

So, the length of each side of the triangle is (3-x)

Calculating the area;

Area = ½bh

Where b = base = 3 - x

height is calculated as;

h² = (3-x)² + (½(3-x))² --- from Pythagoras

h² = 9 - 6x + x² + (3/2 - ½x)²

Let h² = 0

0 = 9 - 6x + x² + (9/4 - 6/4x + ¼x²)

0 = 9 + 9/4 - 6x - 6/4 + x² + ¼x²

0 = 45/4 - 30x/4 + 5x²/4

0. = 5x²/4 - 30x/4 + 45/4

0 = 5x² - 15x/4 - 15x/4 + 45/4

0 = 5x(x/4-¾) - 15(x/4 - ¾)

0 = (5x - 15)(x/4 - ¾)

5x = 15 or x/4 = 3/4

x = 3 or x = 3

So, h = 3

Area = ½bh

Area = ½ * (3-x) * 3

Area = ½(9-3x)

Volume= Integral of ½(9-3x) {3,0}

V = 9/2 - 3x/2 {3,0}

V = 9x/2 - 3x²/4 {3,0}

V = 9(3)/2 - 3(3)²/4

V = 27/2 - 27/4

V = 27/2

4 0
3 years ago
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Greeley [361]
The answer is 21 because 0.250×84=21
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3 years ago
A rectangular painting is 2 feet long and 56 foot wide. Which is the area of the painting?
Novay_Z [31]

Answer:

I'm pretty positive it should actually be 112.

Step-by-step explanation:

You find the area of a rectangle by multiplying length times width. I don't know how else to explain that all of the answers are incorrect.

6 0
2 years ago
you are trying to upload a photo for your school picture,but you need to reduce the size of the photo by a quarter of its origin
Free_Kalibri [48]

the scale factor is 1/4, which is equivalent to:

\frac{1}{4}=\text{ }\frac{1}{2^2}=2^{-2}

4 0
1 year ago
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