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3 years ago

A coin is tossed 5 times. Find the probability that none are heads. Find the probability that at most 2 are heads.

1 answer:

6 0

1- the answer is 1/32

each time we flip a coin the whole probabilities are 2
if we flip it 5 times
2*2*2*2*2=32

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nikitadnepr [17]

The answer is B(2,22).
Since 1 shirt costs 11 dollars, 2 shirts will cost 22 dollars. Hope this helps!

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3 years ago

aleksklad [387]

$50+x \leq 50$

Subtract 50 from both sides:

$50+x-50 \leq 50 - 50$

$x \leq 0$

hope this helps!

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3 years ago

alina1380 [7]

Answer:

we know that and means adding so.

from the question

2+2/3-1+1/3

=1+2/3+1/3

=(3+2+1)/3

=6/3

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2 years ago

8_murik_8 [283]

$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

There are 2 roots so the only way to complete the square is,

$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

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3 years ago

miss Akunina [59]

Answer:

a number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11).

Step-by-step explanation:

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3 years ago