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denis23 [38]
3 years ago
11

Suppose that you flip a coin 13 times. what is the probability that you achieve at least 5 tails?

Mathematics
1 answer:
mixer [17]3 years ago
5 0
Probability of flipping either a head or a tail = 1/2

probability of flipping 6 tails in a row (1/2)*6

<span>probability of flipping at least 1 head = 1 - (1/2)*6 = 63/64 </span>
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The perimeter of a square piece of gold is 60 millimeters. How long is each side of the piece of gold?
anyanavicka [17]

Answer:

just divide 60 millimeters by 4

7 0
3 years ago
Read 2 more answers
What is X and A??? The have to equal the same thing, but one is multiplying and one is adding (picture)
Aleksandr-060686 [28]
X*a = 244  is equation (1)
x+a = 2    is equation (2)

Solve equation (2) for 'a' to get
x+a = 2
a = 2-x
Call this equation (3)

We will plug equation (3) into equation (1)
x*a = 244
x*(a) = 244
x*(2-x) = 244
Notice how the 'a' is replaced with an expression in terms of x

Let's solve for x
x*(2-x) = 244
2x-x^2 = 244
x^2-2x+244 = 0

If we use the discriminant formula, d = b^2 - 4ac, then we find that...
d = b^2 - 4ac
d = (-2)^2 - 4*1*244
d = -972
indicating that there are no real number solutions to the equation x^2-2x+244 = 0

So this means that 'x' and 'a' in those two original equations are non real numbers. If you haven't learned about complex numbers yet, then the answer is simply "no solution". At this point you would stop here. 

If you have learned about complex numbers, then the solution set is approximately 
{x = 1 + 15.588i, a = 1 - 15.588i}
which can be found through the quadratic formula

Note: it's possible that there's a typo somewhere in the problem that your teacher gave you. 

6 0
3 years ago
What is the probability of you getting no heads at all for tossing a fair coin three times? (6.25 points)?
Vlad1618 [11]
1/2 * 1/2 *1/2 = 1/8
5 0
3 years ago
Thanks if u help ✨:)
faltersainse [42]

Answer:

D.mode

Step-by-step explanation:

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Write the quadratic equation in standard form going through the points (-1,-5) (0,-4) (2,10)
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