How many solutions does the equation 3x-2(x+10)=x-20

Mathematics

1 answer:

Ber [7]3 years ago

5 0

Answer:

infinite

Step-by-step explanation:

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Determine whether set B is a subset of A. 7. A = {2, 3, 5, 7, 11} B = {3, 5, 7, 9, 11)

VARVARA [1.3K]

Answer:

Set B is not a subset of A.

Step-by-step explanation:

If there are sets, A and B with some elements, then B can be called subset of A, if every element of B is present in set A.

Example.

Example

A is set of integers

B is set of natural numbers

we know set of integers is all the negative numbers, 0 and all the positive discrete numbers like

A = {......-3,-2,-1,0,1,2,3,4........}

B is set of positive discrete numbers from 1 to infinity)

B = {1,2,3,4........}

Thus, we see every element of B is present in A . Hence B is subset of A

___________________________________________

Given

A = {2, 3, 5, 7, 11}

B = {3, 5, 7, 9, 11)

Here,

In set B . elements 3,5,7,11 are present in set A, but

Element 9 from set B is missing Set A.

Since, every element of Set B is not present in set A hence

Set B is not a subset of A.

7 0

3 years ago

HELP PLEASE Evaluate x-4/2 when x = –1.6.

djverab [1.8K]

X - 4/2 ; where x = -1.6

Substitute x by its value.

-1.6 - 4/2 *as you notice, one number is in decimal and the other is in fraction form. We need to convert one form to the other to make the numbers like numbers so that solving the equation will be easier and less confusing.

4/2 can easily be converted into decimal by dividing 4 by 2 which equals to 2.

So, -1.6 - 2 = ? The operation is a subtraction, but the other number is in negative form, if both numbers have the same sign, we add them up and the sign is carried over to the sum.

-1.6 -2 = -3.6 * we add 1.6 + 2 = 3.6, then we carry over its negative sign = -3.6

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shutvik [7]

The best answer is B.

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If Daniel walks 0.05 (5 hundredths) a

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