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nalin [4]
3 years ago
13

If 3x + 2y = 8 and x is twice the value of y, what is the value of x -y?

Mathematics
2 answers:
tatyana61 [14]3 years ago
6 0

Answer: x-y = 1

Step-by-step explanation:

Given:

3x + 2y = 8

since x is twice the value of y , this means that :

x = 2y  .......................... **

we will the substitute it into the main equation , that is we will substitute 2y in place of x. so the equation becomes :

3(2y) + 2y = 8

6y + 2y = 8

8y = 8

divide through by 8

y = 1

substitute y = 1 into equation ** , that is

x = 2(1)

x = 2

this means that :

x = 2 and y = 1 , so

x - y = 2 -1

x-y = 1

Galina-37 [17]3 years ago
3 0

Answer:

1

Step-by-step explanation:

3x+2y=8          

x=2y

3(2y)+2y=8

6y+2y=8

8y=8

y=1

x=2(1)

x=2

x-1=2-1

x-y=1

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<h3>What are independent events?</h3>

We say that two events are independent if the outcome of one does not affect the outcome of the other.

In this case, the outcome of the spinner clearly does not affect the outcome of the card draw, so the events are independent.

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P(1 and not D) = (1/4)*(6/8) = 3/16

If you want to learn more about probability, you can read:

brainly.com/question/251701

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