2 years ago

A coin tossed 5 times. What is the probability of getting

Mathematics

1 answer:

erma4kov [3.2K]2 years ago

4 0

umm....... I think it was exactly 2 head

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2x² + 4x + 4 + x² + 1 = 180

Tasya [4]

Step-by-step explanation:

$2 {x}^{2} + 4x + 4 + {x}^{2} + 1 = 180$

$3 {x}^{2} + 4x + 5 = 180$

${3x}^{2} + 25x - 21x - 175 = 0$

$x \times (3x + 25) - 7(3x + 25) = 0$

$(3x + 25) \times (x - 7) = 0$

$3x + 25 = 0 = x - 7 = 0$

$x = - \frac{25}{3} = x = 7$

$= x_{1} = - \frac{25}{3} . \: \: x_{2} = 7$

5 0

3 years ago

For the inverse variation equation xy=k, what is the constant of variation,k, when x = -3and y=-2

const2013 [10]

Answer:

Step-by-step explanation:

xy=k

Value of k ; when ; x = - 3 and y = - 2

Put x = - 3 and y = - 2 into the equation :

(-3)(-2) = k

-3 * - 2 = k

6 = k

The constant of variation k = 6

8 0

3 years ago

Solve the following equation for y: −8x+ 4y = 20

MrRissso [65]

Answer:

y=5+2x

Normally I would explain it, but im in a bit of a hurry today. I apologize for the inconvenience!

8 0

3 years ago

What is -0.009 to the second power

kondaur [170]

I believe it's -0.000081

5 0

3 years ago

If the probability that event A takes place is 1/5, what is the probability of event A not

steposvetlana [31]

The probability is 4/5

4 0

3 years ago