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Charra [1.4K]
3 years ago
6

Select all the correct locations on the image. Select all the expressions that result in a product that is a rational number. MU

LITIPLE CHOICE
4/3 x 12/3

32/4 x 15/4

\sqrt{\frac{3}{2} } x 22/7

\sqrt{11} x 2/3
Mathematics
1 answer:
Allisa [31]3 years ago
4 0

Answer:

The 1st & 2nd option

Step-by-step explanation:

Ans1: 16/3

Ans2: 30

Ans3: 11/7×surd6

Ans4: 2/3×surd11

Rational number is a number that can be expressed in ratio (quotient)

It can be expressed in the form of repeating or terminating decimal

Example:

16/3 is equal to

5.3333333333....(repeating decimal)

thus it is a rational number

1/4 is equal to

0.25 (terminating decimal)

thus it is a rational number

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E[X+2]=10+2=12

The variance of a random variable X is

V[X]=E[X^2]-E[X]^2

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V[X+2]=E[(X+2)^2]-E[X+2]^2

We already know E[X+2]=12, so simplifying above, we get

V[X+2]=E[X^2+4X+4]-12^2

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V[X+2]=(V[X]+E[X]^2)+4E[X]-140

Standard deviation is the square root of variance, so V[X]=3^2=9.

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V[aX+b]=a^2V[X]+b^2V[1]

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Step-by-step explanation:

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