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3 years ago

9

Suppose that iq scores have a bell shaped distribution the average iq of students in a particular state 3309 class is 100 with s

tandard deviation of 15 find the approximate percentage of students with scores between 70 and 130

1 answer:

Elodia [21]3 years ago

7 0

The answer is 95 percent.

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For a population with µ = 40 and σ = 8, what is the z-score corresponding to X = 34?

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Step-by-step explanation:

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3 years ago

Simplify the expression. 5√2+√18<br><br> a) 8√2<br><br> b) 14√2<br><br> c) 18√2<br><br> d) 6√18

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3 years ago

Which expression is equivalent to (image attached)

Monica [59]

<h2>Hello!</h2>

The answer is:

B. $x(7x^{2}-3x+9)-3(7x^{2}-3x+9)$

<h2>Why?</h2>

We are given a simplified expression and we are asked to know which of the given options is equivalent to the simplified expression, so, we need to apply the distributive property in order to find the correct choice.

The distributive property states that:

$(a+b)(c+d+e)=a(c+d+e)+b(c+d+e)=ac+ad+ae+bc+bd+be$

So, if we are given the following expression:

$(x-3)(7x^{2}-3x+9)$

Then, we need to apply the distributive property in order to find the equivalent expression:

$(x-3)(7x^{2}-3x+9)=x(7x^{2}-3x+9)-3(7x^{2}-3x+9)$

Hence, the correct option is:

B. $x(7x^{2}-3x+9)-3(7x^{2}-3x+9)$

Have a nice day!

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