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dlinn [17]
3 years ago
10

Which expression represents the product of 3 and y? 3 + y 3 − y 3 over y 3y

Mathematics
1 answer:
Eva8 [605]3 years ago
5 0

Answer:

3y is the expression that represents the product of 3 and y

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Which is equivalent to "12 chairs for every 3 tables"?
trapecia [35]
The answer is A ;).
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Simplify 8 + (3^2 - 4)
wel

Hey there!

In order for you to solve this equation you could do PEMDAS, which is ↓

  • Parentheses
  • Exponents
  • Multiplication
  • Division
  • Addition
  • Subtraction

In this particular equation we have ↓

  1. Parentheses
  2. Exponents
  3. Addition
  4. Subtraction

So, the first thing we need to do to solve this equation is solve  what is in the parentheses

(3^2 - 4)

Nextly, we have to do the exponents

3^2

So, let's solve the parentheses & exponents

3^2 =  9

We could now "remove" the parentheses

9 - 4 = 5

Now we could move onto the last step, which is addition

8+5 = 13

\boxed {Answer: 13}

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

5 0
3 years ago
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PLSS HELPPP!!! I NEED THE ANSWER NOW !
shusha [124]

The property used to arrive at line 2 is the additive property of equalities

The additive property of equalities states that for real numbers if x = y : then x + z = y + z  

For example if 2 = 2 , then 2 + 1 = 3

In order to arrive at line 2, x and 2x were added together to arrive at 3x

The distributive property was used to arrive at line. The property states that : x(1 + 2) = x + 2x

Subtractive property of equalities was used to arrive at line 3

To learn more, please check: brainly.com/question/10617252?referrer=searchResults

4 0
3 years ago
On any given day, the probability that a large local river is polluted by carbon tetrachloride is 0.12. Each day, a test is cond
babymother [125]

Answer:

a) 0.2416

b) 0.4172

c) 0.0253

Step-by-step explanation:

Since the result of the test should be independent of the time , then the that the test number of times that test proves correct is independent of the days the river is correct .

denoting event a A=the test proves correct and B=the river is polluted

a) the test indicates pollution when

- the river is polluted and the test is correct

- the river is not polluted and the test fails

then

P(test indicates pollution)= P(A)*P(B)+ (1-P(A))*(1-P(B)) = 0.12*0.84+0.88*0.16 = 0.2416

b) according to Bayes

P(A∩B)= P(A/B)*P(B) → P(A/B)=P(A∩B)/P(B)

then

P(pollution exists/test indicates pollution)=P(A∩B)/P(B) = 0.84*0.12 / 0.2416 = 0.4172

c) since

P(test indicates no pollution)= P(A)*(1-P(B))+ (1-P(A))*P(B) = 0.84*0.88+  0.16*0.12 = 0.7584

the rate of false positives is

P(river is polluted/test indicates no pollution) = 0.12*0.16 / 0.7584 = 0.0253

4 0
3 years ago
James has just sold his motorbike for £1,890. He bought the motorbike for £2,700. What fraction of the original cost did he sell
valentina_108 [34]
1890/2700=7/10
7/10 is the answer
3 0
3 years ago
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