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Triss [41]
3 years ago
9

Which of the following sets are closed under subtraction? Select all that apply.

Mathematics
2 answers:
Vanyuwa [196]3 years ago
7 0

only integers and polynomials are under subtraction.

Rina8888 [55]3 years ago
4 0

Answer:

Integers

Polynomials

Step-by-step explanation:

A set is closed under an operation if performance of that operation on members of the set always produces a member of that set.

so, closed under subtraction means if we subtract two numbers of a set than it must belong to that set.

Integers:  They are closed under subtraction.

since, if we subtract two integers it will be an integer only.

Irrational numbers:  They are not closed under subtraction.

example- 2+√2 and √2 are two irrational numbers but 2+√2-√2=2 which is not an irrational number

Whole numbers: They are not closed under subtraction.

example- 1 and 2 are whole numbers but 1-2= -1 is not an whole number.

Polynomials: They are closed under subtraction.

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A rectangular painting is 42 centimeters wide and 51 centimeters long. What is the perimeter of this painting?
Alex
186cm
You add all the sides up, so 42+42+51+51 which equals 186cm
6 0
2 years ago
What is the surface area of this triangular prism? The base of each triangle is 42 m and the height of the triangular base is 20
shutvik [7]

<u>Given</u>:

The base of each triangular base is 42 m.

The height of each triangular base is 20 m.

The sides of the triangle are 29 m each.

The height of the triangular prism is 16 m.

We need to determine the surface area of the triangular prism.

<u>Surface area of the triangular prism:</u>

The surface area of the triangular prism can be determined using the formula,

SA=bh+(s_1+s_2+s_3)H

where b is the base of the triangle,

h is the height of the triangle,

s₁, s₂ and s₃ are sides of the triangle and

H is the height of the prism.

Substituting the values, we get;

SA=(42)(20)+(42+29+29)(16)

SA=840+(100)(16)

SA=840+1600

SA=2440

Thus, the surface area of the triangular prism is 2440 m²

8 0
3 years ago
Please help it’s not hard
blagie [28]

Answer:

H

Step-by-step explanation:

y= (1)x-3

Positive gradient, and the y intercept for the graph is -3, F is not the answer, the Y intercept is not -3.

7 0
2 years ago
There are five cars in line at a stoplight. Each of these cars is a different color and different type of car. Diego is driving
adell [148]
Ok, here we go:
5 cars total.
1. Rachel - first car in line, yellow, SUV
2. blue car (Rachel is in front of the blue car), convertible, Anton
3. minivan - third car in line, Diego
4.  white car, sedan, Ingrid
5. green car, immediately behind white car, Yuna, pickup


We know that Rachel is first, a blue car is second and the minivan is third.  We know that 3, 4 cannot be a convertible since one is a minivan and the other is a sedan.  We also know that a yellow car is in front of the convertible. 

Based off of that we know that car 5 cannot be a convertible since 4 is white and not yellow. So 1 or 2 is the convertible and SUV.  But we know that Rachel is in front of a blue car and the yellow car is in front of a convertible so that makes car #2 the blue convertible and car #1 the yellow SUV. 

Fill in what you do know and start to eliminate the outliers.  Hope that helps.

8 0
3 years ago
What is the value of<br>7x2 - 10, when x = 6?<br>​
cestrela7 [59]

Answer:

242

Step-by-step explanation:

7(6*6)-10

7(36)-10

252-10

=242

7 0
3 years ago
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