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kirill115 [55]
3 years ago
14

X+2y=3 x-y=3 x=? y=?

Mathematics
1 answer:
alexgriva [62]3 years ago
7 0

Answer:

x = 3

y = 0

Step-by-step explanation:

x + 2y = 3 ---------eqn 1

x - y = 3 --------eqn 2

Using eqn 2 to find the value of y

x - y = 3

Making y the subject of the formula

x - 3 = y

y = x - 3

Substitute the value of y into eqn 1

x + 2y = 3

x + 2(x - 3) = 3

Open the bracket

x + 2x - 6 = 3

3x - 6 = 3

3x = 3 +6

3x = 9

Divide both sides by 3, to get value of x

3x/3 = 9/3

x = 3

To get the value of y, use eqn 2

x - y = 3

3 - y = 3

3 - 3 = y

y = 0

Hint, to know maybe the values are correct, insert the values into the equation

Let's use eqn 2

x - y = 3

x = 3

y = 0

Insert into the equation

x - y = 3

3 - 0 = 3

Our values are correct

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Yuri [45]

According to the calculation, each visitor went down, on average, 11.41 times.

<h3><u>Averages</u></h3>

Given that a water park keeps track of the number of times each visitor goes down water slides during their visit, and 12 visitors went down a water slide 4, 22, 16, 10, 11, 20, 20, 12, 6, 3, 11 and 1 times, to determine the average number of times each visitor went down, the following calculation must be performed:

  • (4 + 22 + 16 + 10 + 11 + 20 + 20 + 12 + 6 + 3 + 11 + 1) / 12 = X
  • 137 / 12 = X
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Therefore, each visitor went down, on average, 11.41 times.

Learn more about averages in brainly.com/question/897199

5 0
2 years ago
A car with an initial cost of $33,000 is decreasing in value at a rate of 7% each year. Write the exponential decay function to
Brut [27]

Answer:

n= 11.65 years

Step-by-step explanation:

Giving the following information:

Present Value (PV)= $33,000

Future Value (FV)= $15,000

Decrease rate (d)= 7%

<u>To calculate the number of years it will take to reach $15,000; we need to use the following formula:</u>

<u></u>

n= ln(FV/PV) / ln(1+d)  

n= ln(15,000/33,000) / ln(1.07)

n= 11.65 years

7 0
3 years ago
Translate the phrase into a math expression. Twelve more than the quotient of six divided by three. Responses (6÷3)+12 eft paren
aleksandr82 [10.1K]

The given phrase on translation to math expression is (6 ÷ 3) + 12 , the correct option is (a) .

In the question ,

an mathematical phrase is given , that is "Twelve more than the quotient of six divided by three" .

we have to translate it into mathematical expression ,

So , the term quotient of six divided by three is written as 6 ÷ 3 .

and phrase " more " is represented by " + " ,

Hence the given phrase,  "Twelve more than the quotient of six divided by three" is  (6 ÷ 3) + 12 .

Therefore , The given phrase on translation to math expression is (6 ÷ 3) + 12 , the correct option is (a) .

The given question is incomplete , the complete question is

Translate the phrase into a math expression , "Twelve more than the quotient of six divided by three" .

(a) (6÷3)+12

(b) 6÷(3+12)

(c) (3÷6)+12

(d) 3÷(6+12)

Learn more about Expressions here

brainly.com/question/7360128

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1 year ago
At sunrise, the temperature was -12 °F. The temperature increased 19 °F each hour for 3 hours. What was the temperature 3 hours
yawa3891 [41]
-12 degree F + 19 + 19 + 19 = 49 degree F
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3 years ago
Two golfers completed one round of golf. The first golfer had a score of +6 and the second golfer had a score of –3. How many mo
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                                             Question 16

Given that two golfers completed one round of golf.

It is stated that the first golfer had a score of +6 and the second golfer had a score of -3.

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It is clear that the first golfer is 6 over par, while the second golfer is under 3.

Thus, the equation becomes:

-3 + x = 6

adding -3 to both sides

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simplify

x = 9

Thus, the second golfer has taken 9 more shorts.

                                             Question 17

When we talk about credit, it means:

Credit = +

When we talk about debt, it means:

Debit = -

Thus,

Credit = +84

Debt = -29

Balance = 84 + (-29)

              = 84 - 29

               = 55

Thus, the balance is: 55

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