2 years ago

What is the value of the expression −9 x 2.2?

Mathematics

2 answers:

Luden [163]2 years ago

6 0

Answer:

-19.8

Step-by-step explanation:

katrin2010 [14]2 years ago

4 0

Answer:

-19.8

Step-by-step explanation: if correct brainlist?

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2 years ago

In a jar of coins, the ratio of nickels to dimes is 2:7. If the jar contains 350 nickels, how many dimes are there? A) 175 B) 35

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3 years ago

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Consider the set of differences, denoted with d, between two dependent sets: 84, 85, 83, 63, 61, 100, 98. Find the sample standa

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Answer:

The sample standard deviation is 15.3.

Step-by-step explanation:

Given data items,

84, 85, 83, 63, 61, 100, 98,

Number of data items, N = 7,

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Mean of the data points,

$\bar{x}=\frac{84+85+83+63+61+100+98}{7}$

$=82$

Hence, sample standard deviation would be,

$\sigma= \sqrt{\frac{1}{N-1}\sum_{i=1}^{N} (x_i-\bar{x})^2}$

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2 years ago