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2 years ago

Evaluate the expression: 6(a + b) where a = -3 and b = 6

Mathematics

1 answer:

levacccp [35]2 years ago

8 0

Answer here you go

Step-by-step explanation:

(-3 x 6 = -18)

6 x -18= -108

multiplication with postive and gegitives rule of thumb

negative times a positive equals a negative

negitive times a negative equals a positive

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What is the perimeter of the parallelogram shown below? And how did you get that answer.

romanna [79]

The answer is 194

Explanation:

A parallelogram is a tilted rectangle and possess all the features of rectangle except it's symetry

Opposite sides of a parallelogram are equal in length

So if One side is 48 then the opposite length the is also 48 and vice versa, Same for the 49 too

My calculations were 49+49+48+48=

2(49)2(48)=

4 0

2 years ago

The value of x is??!!

Rashid [163]

Answer:

x = 4.56

Step-by-step explanation:

57 + x + 25x + x = 180

27x + 57 = 180

27x = 123

x = 4.56

7 0

3 years ago

I need help with this!

postnew [5]

Answer:

corresponding

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

If the cost of 819.73 for full cover insurance for a female and a male is 1192.64 what is the percentage?

irinina [24]

Answer:

68.7%

Step-by-step explanation:

If the cost of 819.73 for full cover insurance for a female and a male is 1192.64 what is the percentage?

The Percentage is calculated as:

819.73/1192.64 × 100

= 0.68732392004293 × 100

= 68.732392004 %

Approximately = 68.7%

Therefore, the percentage is 68.7%

7 0

3 years ago

Questions 2-7 will all be in regards to this data set:Observation X Y1 20 302 23 353 28 404 26 385 24 376 32 457 35 508 24 349 3

Tomtit [17]

Answer:

r =0.4437

Step-by-step explanation:

We have the follwoing dataset:

X: 20,23,53,4,24,32,35,24,31,23

Y: 30,35,40,38,37,45,50,34,42,32

n=10

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

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

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

For our case we have this:

n=10 $\sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007$

Th excel figure attached shows the calculations for each sum.

$r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437$

So then the correlation coefficient would be r =0.4437

3 0

3 years ago