3 years ago

Consider a t distribution with 21 degrees of freedom. Compute P<−1.55

Mathematics

1 answer:

matrenka [14]3 years ago

4 0

Answer:

who knows such types of answer

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The wrestling team wants to sell pies for a

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Use the quadratic formula to solve the equation 2x^2+2x-4=0

const2013 [10]

Answer:

Step-by-step explanation:

The quadratic formula for the quadratic equation ax² + bx + c = 0:

$x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

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$a=1,\ b=1,\ c=-2$

Substitute:

$x=\dfrac{-1\pm\sqrt{1^2-4(1)(-2)}}{2(1)}=\dfrac{-1\pm\sqrt{9}}{2}=\dfrac{-1\pm3}{2}\\\\x_1=\dfrac{-1-3}{2}=\dfrac{-4}{2}=-2\\\\x_2=\dfrac{-1+3}{2}=\dfrac{2}{2}=1$

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3 years ago

Solve for . Write the smaller solution first, and the larger solution second.<br> (x - 1)² – 9=0

olganol [36]

Answer:

-2 , 4

Step-by-step explanation:

(x - 1)² – 9=0

(add nine to both sides)

(x - 1)² = 9

(square root both sides)

x - 1 = (positive or negative) 3

(add 1)

x = 4 or -2

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