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Harlamova29_29 [7]
3 years ago
8

What is the area of the triangle

Mathematics
1 answer:
Lemur [1.5K]3 years ago
6 0

Answer:

16

Step-by-step explanation:

area of a triangle is <u>height x </u><u>base</u>

2

<u>4•8</u> = <u>3</u><u>2</u> = 16

2 2

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Worth 30 points please give the whole answers.
k0ka [10]
1. (2r + 9)(2r-9) = 4r^2 -81
+ (2r - 9)^2 = 4r^2 - 36r + 81
= 8r^2 - 36r

2. 12 - 5 [ a^2 + a - 1 ] + 5a
= 12 - 5a^2 - 5a + 5 +5a
= 17 - 5a^2

x^3 + 3x^2 + 6x + 18
______
3. x-3/ x^4 + 7
- ( x^4 - 3x^3)
----------------
3x^3 + 7
- (3x^3 - 6x^2)
-------------------
6x^2 + 7
- (6x^2 - 18x)
-------------------
18x + 7
- (18x - 54)
--------------
7 + 54 = R = 61

welp That's What I get
5 0
3 years ago
Read 2 more answers
Select ALL terms that are like terms with 10x3<br> x3<br> хЗу<br> 10x<br> 2x3
svet-max [94.6K]

Answer:nbcmbcvd

chmcnbcvvkg

Step-by-step explanation:

nvnggvcmvc,nbchgfhgsfd

3 0
3 years ago
It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.
frutty [35]

Answer:

20 days

Step-by-step explanation:

It takes 12 men 5 days to complete a job. Work out how many days it would take 3 men to complete the same job.

12 * 5 = 60

60/3 = 20

It will take 3 men 20 days to do the same job

3 0
3 years ago
URGENT PLEASE HELP WITH THIS MATH QUESTION ITS ABOUT AREA
ratelena [41]

Answer:

25 cm^2

Step-by-step explanation:

Area = (height * base)/2

(5 * 10) / 2 = 25 cm^2

3 0
3 years ago
The Correlation Coefficient for a relationship is - 0.95. What percentage of the dependent variable in the correlation is due pu
seropon [69]

Answer:

The unexplained variance would be 100-90.25 % = 9.75. And that correspond to the percentage of the dependent variable in the correlation is due purely to chance

Step-by-step explanation:

Previous concepts

Pearson correlation coefficient(r), "measures a linear dependence between two variables (x and y). Its a parametric correlation test because it depends to the distribution of the data. And other assumption is that the variables x and y needs to follow a normal distribution".

In order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

On this case we got that r =-0.95

In order to find the % of variance explained by the model we need to calculate the determination coefficient given by:

R^2 = (-0.95)^2 = 0.9025

And that means this : "90.25% of the variation of y is explained by the variation in x"

So then the unexplained variance would be 100-90.25 % = 9.75. And that correspond to the percentage of the dependent variable in the correlation is due purely to chance

8 0
4 years ago
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