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3 years ago

If three coins are tossed at the same time,how many ways in the sample space contain exactly two tails?

1 answer:

7 0

For three tosses of the coin all the possible outcomes are:
H-H-H
T-H-H
H-T-H
H-H-T
T-H-T
T-T-H
H-T-T
T-T-T
4 times

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Please help with math 30 points

Doss [256]

Your answer is going to be y = l x - 2 l

3 0

3 years ago

Determine the equation of the plane in the form

Bond [772]

A plane parallel to vectors <9, 6, 2> and <-8, -4, -5> is given by
$\left|\begin{array}{ccc}x&y&z\\9&6&2\\-8&-4&-5\end{array}\right| =0\\ (-30 + 8)x - (-45 + 16)y + (-36 + 48)z = 0\\-22x+29y+12z=0$

Since the plane passes through point (5, -5, 8), then
-22(5) + 29(-5) + 12(8) = -110 - 145 + 96 = -159

The required plane is -22x + 29y + 12z = -159
z = 11/6x - 29/12y - 53/4

8 0

4 years ago

Es para matematica cuanto es 9x (-8) =

alexira [117]

Answer:

−72x

Step-by-step explanation:

4 0

3 years ago

Multiply and simplify answer (1-x)(2-7) please help.

Fynjy0 [20]

$(1-x)(2-7) =\\
(1-x)\cdot(-5)=\\
-5+5x=\\
5x-5$

5 0

4 years ago

Help with this question please!

vova2212 [387]

V = 120 in^3

Here is why:

The volume formula for a pyramid is:

$V=\frac{1}{3}Bh$

The B stands for the area of the base, which in this case is a right triangle. We will find the area of the right triangle first, then plug it into the equation.

The area formula for a triangle is:

$A=\frac{1}{2}bh$

Plug in the numbers.

$A=\frac{1}{2}*9*10$

A = 45

Now we have found the area of B, we can plug it into the volume formula for the pyramid.

$V=\frac{1}{3}*45*8$

V = 120 in^3

7 0

3 years ago