How many ways can a person toss a coin 13 times so that the number of tails is between 7 and 11 inclusive?

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1.C

2.C

3.D

4.D

5.D

6.A

7.C

8.B

9.A

10.C

11.A

12.B

13.D

14.C

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7 0

3 years ago

2 = (-x) Help I'm a not so bright blonde!

makvit [3.9K]

If you need to solve this equation you can multiply the both side of equation on (-1). Like that
2 = (-x);
-1·2 = (-1)·(-x)
if you multiply negative and positive you'll have negative,
if you multiply negative and negative you'll have positive. So

-2 = x. or
x = -2.
The answer is -2.

5 0

3 years ago