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3 years ago

3. Find the difference. a. 82-(-14) b. -18- (-55) C. -17-44 d. 70- (-101)

Mathematics

1 answer:

n200080 [17]3 years ago

8 0

Answer:

A. -68

B. 37

C. -61

D. 171

Step-by-step explanation:

Rule for A, B, D: 2 negatives is the same as addition

(how I did C: add them together then add the negative)

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3 years ago

Here are two sets of numbers, a and b. Set a :200,104,100,160. Set b: 270,400,483,300, x. Mean of set a: mean of set b= 3:8. Wor

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Given:

The given sets are:

Set a : 200, 104, 100, 160.

Set b: 270, 400, 483, 300, x.

Mean of set a: mean of set b= 3:8

To find:

The value of x.

Solution:

Formula for mean:

$Mean=\dfrac{\text{Sum of observations}}{\text{Number of observation}}$

The mean of set of a is:

$Mean=\dfrac{200+104+100+160}{4}$

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$Mean=\dfrac{270+400+483+300+x}{5}$

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Mean of set a: mean of set b= 3:8

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3 years ago