2 years ago

If a=-2, then (3a)^2=

Mathematics

2 answers:

tino4ka555 [31]2 years ago

6 0

(3a)^2

=12

the answer is 12

Aliun [14]2 years ago

4 0

Answer:

I think it's 12.

Step-by-step explanation:

3(-2)^2 in a calculator give you 12

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Which equation represents a proportional relationship?

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Please help I really need help please ans thank you

Vinil7 [7]

Answer:

see below

Step-by-step explanation:

x = 63 and y = 27

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Read 2 more answers

You previously found the mean of this data set. Use that in answering the question. 63, 89, 92, 73, 79, 72, 34, 36, 94, 21, 25,

kicyunya [14]

Answer:

Sum of squares of differences = 11239.74

Step-by-step explanation:

We are given the following data set:

63, 89, 92, 73, 79, 72, 34, 36, 94, 21, 25, 93, 22, 90, 79

We have to calculate the sum of square of the data set.

Formula:

$\text{Sum of square of differences} = \sum (x_i -\bar{x})^2$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{962}{15} = 64.13$

Sum of squares of differences =

1.284444444 + 618.3511113 + 776.5511113 + 78.61777778 + 221.0177779 + 61.88444445 + 908.0177776 + 791.4844443 + 892.017778 + 1860.484444 + 1531.417778 + 833.2844446 + 1775.217777 + 669.0844446 + 221.0177779

= 11239.74

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Write 1.4 over 7 in simplest form

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2/10 because 0.7/7 is equal to one tenth, so 1.4/7 is equal to 2/10

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Step-by-step explanation:

The area is 289

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