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3 years ago

Please help ASAP! I always give brainliest!(unless both answers are perfect) and thx

Mathematics

1 answer:

vlabodo [156]3 years ago

5 0

Answer:

This is assuming that both x and y do not equal zero, if that is necessary information. 1 minute ago Solve for x in the equation x squared minus 14 x + 31 = 63.

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Hellpppppppppppppppp

ANTONII [103]

Answer:

128.57..... degrees

Step-by-step explanation:

3 0

3 years ago

ANSWER THIS QUESTION FAST AND I WILL GIVE YOU BRAINLEST

fiasKO [112]

Answer:

{y,x} = {-6,-2}

Step-by-step explanation:

/ Solve equation [2] for the variable y

[2] y = 2x - 2

// Plug this in for variable y in equation [1]

[1] (2x-2) - x = -4

[1] x = -2

// Solve equation [1] for the variable x

[1] x = - 2

// By now we know this much :

y = 2x-2

x = -2

// Use the x value to solve for y

y = 2(-2)-2 = -6

6 0

3 years ago

Find the margin of error for a 90% confidence interval when the standard deviation is LaTeX: \sigma= 50????=50 and LaTeX: n = 25

Murrr4er [49]

Answer:

The margin of error for a 90% confidence interval is 16.4

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 25

Standard deviation = 50

$z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64$

Margin of error =

$z_{critical}\times \dfrac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$1.64\times \dfrac{50}{\sqrt{25}} = 16.4$

Thus, the margin of error for a 90% confidence interval is 16.4

8 0

3 years ago

(x^2-1)(4x^3-3x^2+5)

emmainna [20.7K]

Anwser: 4x^5-3x^4-4x^3+8x^2-5

Step-by-step explanation:

yes

6 0

1 year ago

Find the surface area of the cylinder

Alik [6]

Answer:

Surface Area = 282.6 cm²

Step-by-step explanation:

Formula: SA = 2 $\pi$ rh + 2 $\pi$ r²

SA = 2 $\pi$ rh + 2 $\pi$ r²

SA = 2(3.14)(5)(4) + 2(3.14)(5)

SA = 2(3.14)(5)(4) + 2(3.14)(25)

SA = 125.6 + 157

SA = 282.6 cm²

4 0

3 years ago