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aliina [53]
3 years ago
13

Which operations is the following set closed under {...,-3,-2,1,3,...}

Mathematics
1 answer:
ch4aika [34]3 years ago
6 0
Addition should be the answer to your question
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15 1/2 - 13 5/4=<br> please answer i really need help :(
Kaylis [27]

Answer:

i believe its 1.25

Step-by-step explanation:

I HOPE THIS HELPS GOOD LUCK

4 0
3 years ago
The radius of a cylindrical vessel is 7 cm and height is 1400 m . Find the cost of painting its inner curved surface area at the
Olegator [25]

Answer:

Cost = 616000 DHS per square centimetre.

Step-by-step explanation:

curved surface of a cylinder = 2\pirh

r = 7 cm

h = 1400 m = 140000 cm

The outer curved surface area of the cylinder = inner curved surface area of the cylinder

The inner curved surface of the cylinder = 2\pirh

                                      = 2 x \frac{22}{7} x 7 x 140000

                                      = 2 x 22 x 1 x 140000

                                      = 6160000

The inner curved surface of the cylinder is 6160000 square centimetre.

But, the cost of painting is at the rate of 10 DHS per square centimetre.

The inner curved surface of the cylinder = 6.16 x 10^{6} square centimetre.

cost of painting the inner curved surface area = \frac{6.16*10^{6} }{10}

                                                                       = 616000 DHS per square centimetre

The cost of painting the inner surface is 616000 DHS per square centimetre.

6 0
3 years ago
HELP FAST!!!!!!!!!!
Alenkinab [10]
X - the percent of increase

210+210x=260 \\&#10;210x=260-210 \\&#10;210x=50 \\&#10;x=\frac{50}{210} \\&#10;x \approx 0.238 \\&#10;x \approx 23.8\%

The percent of increase is approximately 23.8%.
5 0
3 years ago
5. In a dilation what mathematical operation is used with th scale factor?
xxMikexx [17]

Step-by-step explanation:

multiplication is the mathematical operation used with scale factor

6 0
3 years ago
Find x. Round your answer to the nearest tenth of a degree . Please help I will mark brainliest
Oksana_A [137]

Using trigonometric ratio, the value of x is 63.6°

<h3>Trigonometric Ratio</h3>

This is the ratios of sides of a right-angled triangle with respect to any of its acute angles are known as the trigonometric ratios of that particular angle.

Trigonometric ratio are often coined as SOHCAHTOA

In the given triangle, we need to find the value of x using trigonomtric ratio.

Since we have the value of adjacent and hypothenuse, we definitely need to use cosine

cosθ = adjacent / hypothenuse

adjacent = 4

hypothenuse = 9

Substituting the values into the equation;

cos θ = 4 / 9

cos θ = 0.444

θ = cos⁻¹ 0.4444

θ = 63.6°

Learn more on trigonometric ratio here;

brainly.com/question/24349828

#SPJ1

7 0
1 year ago
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