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2 years ago

7

Suppose you have a normally distributed set of data pertaining to a standardized test. The mean

1 answer:

lina2011 [118]2 years ago

7 0

<span>The formula to find the z score in a normally distributed set of data is: z = (x - ÎĽ) / Ď With ÎĽ being the mean, Ď being the standard deviation, and x being the score. Substituting these values into the formula gives us z = (800 - 500) / 100 = 3 The z-score of the 800 point score is 3.</span>

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The sum of ruqiyo’s age and Mohammed’s age is 117. Five times ruqiyo’s age is 9 more than 3 times mohammed’s age. How old is eac

Bess [88]

Answer:

45 and 72

Step-by-step explanation:

Let the ages be r and m

<u>We have:</u>

r + m = 117
5r = 9 + 3m

<u>Substitute m in the second equation and solve for r:</u>

m = 117 - r
5r = 9 + 3( 117 - r)
5r = 9 + 351 - 3r
5r + 3r = 360
8r = 360
r = 360/8
r = 45

<u>Then m is</u>

m = 117 - 45 = 72

3 0

2 years ago

Simplify the imaginary number sqr -75

m_a_m_a [10]

Answer:

5i $\sqrt{3}$

Step-by-step explanation:

Using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

and $\sqrt{-1}$ = i

Given

$\sqrt{-75}$

= $\sqrt{25(3)(-1)}$

= $\sqrt{25}$ × $\sqrt{3}$ × $\sqrt{-1}$

= 5 × $\sqrt{3}$ × i

= 5i $\sqrt{3}$

3 0

3 years ago

If an object is rotated clockwise 130° around a center and then counterclockwise 75° around the same center, what is the angle b

Keith_Richards [23]

That would be 130 - 75 = 55 degrees answer

6 0

3 years ago

Describe a pattern in each sequence. what are the next two terms of each sequence ? 2,4,8,16

yan [13]

Answer:

You are mulitplying the last number by two. The next two terms are 32 and 64.

Step-by-step explanation:

8 0

3 years ago

What is 904.358 rounded to the nearest ten and nearest tenth?

Oksana_A [137]

the answer is 904.4

6 0

2 years ago

Read 2 more answers