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Nutka1998 [239]
2 years ago
12

If you flip a coin 90 times, how many times would you expect to land on tails?

Mathematics
1 answer:
GarryVolchara [31]2 years ago
5 0

Answer:

It would be expected to land on tails 45 times.

Step-by-step explanation:

If there is a 50% chance to land on tails, about half of the time it would land on heads.

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How many solutions does the system have?<br><br> y= -5x - 1<br> y = -5.2 + 7
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y = -5.2 + 7

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valentina_108 [34]

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Step-by-step explanation:

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5x-12y=17 (plus 12y from both sides)

5x=12y+17 (divide 5 from everything)

x=\frac{12y+17}{5}

5x-12y-17=0 (plus 17 from both sides)

5x-12y=17 (minus 5x from both sides)

-12y=-5x+17 (divide everything by -12)

y=\frac{-5x+17}{-12}

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1*9x+18-y-1+3=0 (times 9x by 1)

9x+18-y-1+3=0 (combine like terms)

9x-y+20=0 (minus 20 from both sides)

9x-y=-20 (plus y to both sides)

9x=y-20 (divide 9 from both sides)

x=\frac{y-20}{9}

1*9(x+2)-(y+1)+3=0 (distribute 9 to x and to 2) (distribute -1 to y and to 1)

1*9x+18-y-1+3=0 (times 9x by 1)

9x+18-y-1+3=0 (combine like terms)

9x-y+20=0 (minus 20 from both sides)

9x-y=-20 (minus 9x from both sides)

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y=9x+20

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3 years ago
What is the reference angle for -150 degrees
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Answer: 330

Step-by-step explanation:

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