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marissa [1.9K]
4 years ago
8

Write a expression for the calculation 84 divided into sevenths added to 9 divided into thirds

Mathematics
2 answers:
Dennis_Churaev [7]4 years ago
4 0
(84÷7)+(9÷3) The parentheses are not necessary but I just put them.
I think that's what you meant. If you meant the other thing this would be the equation: (84÷7+9)÷3. Here the parentheses are nessasary
bezimeni [28]4 years ago
4 0

Answer: Our expression is \dfrac{84}{7}-\dfrac{9}{3}=15

Step-by-step explanation:

Since we have given that

84 divided into sevenths means

\dfrac{84}{7}\\\\=12

9 divided into thirds means

\dfrac{9}{3}\\\\=3

Now, 84 divided into sevenths added to 9 divided into thirds means

12+3\\\\ =15

Hence, our expression is \dfrac{84}{7}-\dfrac{9}{3}=15

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Answer:

C. Events E and A are independent

Step-by-step explanation:

we will verify each options

(a)

We can use independent events formula

P(B∩C)=P(B)*P(C)

we are given

P(B)=0.4

P(C)=0.25

P(B∩C)=0.05

now, we can plug these values into formula

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so, this is FALSE

(b)

We can use independent events formula

P(D∩A)=P(D)*P(A)

we are given

P(D)=0.25

P(A)=0.6

P(D∩A)=0.1

now, we can plug these values into formula

and we get

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0.1=0.15

we can see that left side is not equal to right side

so, this is FALSE

(c)

We can use independent events formula

P(E∩A)=P(E)*P(A)

we are given

P(E)=0.5

P(A)=0.6

P(E∩A)=0.3

now, we can plug these values into formula

and we get

0.3=0.5*0.6

0.3=0.3

we can see that both sides are equal

so, this is TRUE

(d)

We can use independent events formula

P(D∩B)=P(D)*P(B)

we are given

P(D)=0.25

P(B)=0.4

P(D∩A)=0.15

now, we can plug these values into formula

and we get

0.15=0.25*0.4

0.15=0.1

we can see that left side is not equal to right side

so, this is FALSE

5 0
4 years ago
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