Evaluate x(-9)+2y when x=4, y=-1

Mathematics

2 answers:

diamong [38]3 years ago

8 0

(4)(-9) + 2 (-1) = - 38

....................................

pshichka [43]3 years ago

6 0

Answer:

= -39

Step-by-step explanation:

x(-9)+2y = -9x + 2y

if:

x = 4

y = -1

then:

-9*4 + 2*-1

-36 - 3

-39

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The passing yards for the top 5 quarterbacks in the country are 3,832, 3,779, 3,655, 3,642, and 3,579. Find the variance and sta

Leviafan [203]

First get the average passing yards:

(3,832 + 3,779 + 3,655 + 3,642 + 3,579) / 5 = 3,697.4

Now get the squared residuals for each quarterback's passing yards. That is, compute the difference between each data and the average, then square the result. For example,

(3,832 - 3,697.4)^2 = 134.6^2 = 18,117.2

For the others, you should get squared residuals of

6,658.56

1,797.76

3,069.16

14,018.6

Take the sum of the squared residuals, then - since this is a sample, and not a population of all quarterbacks - divide the sum by 5 - 1 = 4 to get the variance:

(18,117.2 + 6,658.56 + 1,797.76 + 3,069.16 + 14,018.6)/4 = 10,915.3

The standard deviation is just the square root of the variance:

√(10,915.3) ≈ 104.48

5 0

3 years ago

Read 2 more answers

I'll give u a brainliest to answer this<3

Andre45 [30]

Answer:

762

Step-by-step explanation:

3 0