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3 years ago

A) single step Equation 1) X + 7 = 9

Mathematics

1 answer:

pshichka [43]3 years ago

6 0

X=2
subtract 7 from both sides

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What is the value of x in the equation-2/5x-2=18

Flura [38]

First we have to isolate the varible

-2/5x-2=18
+2 +2

-2/5x=20

then divide both sides by -2/5 to get x completely by itself

-2/5x=20
------- ---
-2/5 -2/5

x=-50

i hope i've helped!

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. If x = 7 + 4√3 then find the value of x2<br> – 1/x2

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Answer:

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Step-by-step explanation:

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What is the area of the square below ?

ivolga24 [154]

To find the are of a square, we simply square the value of a side
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3 years ago

Encuentra tres números enteros positivos consecutivos, tal que el cuadrado del primero se igual al tercero. Determina el número

myrzilka [38]

I don’t speak Spanish

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3 years ago

Consider two independent tosses of a fair coin. Let A be the event that the first toss results in heads, let B be the event that

aliina [53]

Answer with Step-by-step explanation:

We are given that two independent tosses of a fair coin.

Sample space={HH,HT,TH,TT}

We have to find that A, B and C are pairwise independent.

According to question

A={HH,HT}

B={HH,TH}

C={TT,HH}

$A\cap B=$ {HH}

$B\cap C$ ={HH}

$A\cap C$ ={HH}

P(E)= $\frac{number\;of\;favorable\;cases}{total\;number\;of\;cases}$

Using the formula

Then, we get

Total number of cases=4

Number of favorable cases to event A=2

$P(A)=\frac{2}{4}=\frac{1}{2}$

Number of favorable cases to event B=2

Number of favorable cases to event C=2

$P(B)=\frac{2}{4}=\frac{1}{2}$

$P(C)=\frac{2}{4}=\frac{1}{2}$

If the two events A and B are independent then

$P(A)\cdot P(B)=P(A\cap B)$

$P(A\cap)=\frac{1}{4}$

$P(B\cap C)=\frac{1}{4}$

$P(A\cap C)=\frac{1}{4}$

$P(A)\cdot P(B)=\frac{1}{2}\cdot \frac{1}{2}=\frac{1}{4}$

$P(B)\cdot P(C)=\frac{1}{4}$

$P(A)\cdot P(C)=\frac{1}{4}$

$P(A)\cdot P(B)=P(A\cap B)$

Therefore, A and B are independent

$P(B)\cdot P(C)=P(B\cap C)$

Therefore, B and C are independent

$P(A\cap C)=P(A)\cdot P(C)$

Therefore, A and C are independent.

Hence, A, B and C are pairwise independent.

6 0

3 years ago