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3 years ago

HELP ME PLEASE!!!!!! I WILL GIVE BRAINLIEST! Solve the given equation by substitution.

Mathematics

1 answer:

shutvik [7]3 years ago

3 0

Answer:

(X, Y) = (2, 1)

Step-by-step explanation:

Equation put together is

-2x - 3 (5x - 9) = -7

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3 years ago

What is (-a + b) (-c + d)?

algol [13]

Answer:

(−a+b)(−c+d)

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3 years ago

A sociologist recently conducted a survey of senior citizens who have net worths too high to qualify for Medicaid but have no pr

hjlf

Answer:

a) $s= 9.74$

D. 9.74

b) $Median= 74$

B. 74

Step-by-step explanation:

Part a

We have the following dataset given:

69 74 75 62 70 93 64 69 61 88 67 77 87 90 66 91 77 63 82 82 71 74 76 65 83

We can begin calculating the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = 75.04$

Now we can calculate the sample deviation with the following formula:

$s =\sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}$

And after replace we got:

$s= 9.74$

Part b

For this case we need to sort the value on increasing way:

[1] 61 62 63 64 65 66 67 69 69 70 71 74 74 75 76 77 77 82 82 83 87 88 90 91 93

And the median would be the value in the position 13 and we got:

$Median= 74$

6 0

3 years ago