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Pie
3 years ago
15

Derek flips a fair coin 40 times. How many times can he expect heads to appear?

Mathematics
2 answers:
nasty-shy [4]3 years ago
7 0

Answer:

20

Step-by-step explanation:

If you flip a coin, there's a 50% chance of getting heads and a 50%chance of getting tails.

lianna [129]3 years ago
5 0
20 since there are two sides
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Suppose you are given two angles A and B in which angle a is equal to angle b. If the measure of a compliment of angle a is equa
zepelin [54]
5x + 20 = 90 - a = 90 - (3x + 40)
5x + 20 = 90 - 3x - 40 = 50 - 3x
5x + 3x = 50 - 20
8x = 30
x = 30/8 = 15/4

b = 3(15/4) + 40 = 45/4 + 40 = 51.25
The measure of a supplementary angle is 180 - 51.25 = 128.75
 
4 0
3 years ago
What is the value of y=4x−2<br> when x=3<br> ?
MariettaO [177]

Answer:

y = 10

Step-by-step explanation:

y = 4(3) - 2

y = 12 - 2

y = 10

7 0
3 years ago
Read 2 more answers
Write equation for the line with a slope "undefined" and has the same x-intercept as x−y−1=0
Mariana [72]

Answer:

Step-by-step explanation:

Lines with undefined slopes are perfectly vertical, of the form "x = ". A line with "the same x-intercept" as the given line that has an undefined slope will be the line that we want. I know that sounds confusing; we'll work through it then I'll explain it better. In order to find the x-intercep of the given line, solving it for y will make it a bit easier to "see". Therefore,

-y = -x + 1 and

y = x - 1. The x-intercept exists when y = 0, so setting y equal to 0 and solving for x:

0 = x - 1 and

1 = x. That's the x-intercept. It's also the line that we want that has an undefined slope, because "x = " lines are lines vertical lines and vertical lines have undefined slopes.

x = 1 is the line you want.

8 0
3 years ago
Brady used integer chips to model and solve a problem.
nata0808 [166]

Answer:

The answer is "3"

Step-by-step explanation:

In the question, some of the data is missing which is defined in the attached file. please find it.  

\to 7+(-4)\\\\\to 7-4\\\\\to 3

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6 0
3 years ago
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anastassius [24]
Aruthmetic sequene is
an=a1+(n-1)d
where d=common difference between terms
adds 6 every time
d=6
first term is 8
a1=8
8+6(n-1)
distribute
8+6n-6
8-6+6n
2+6n is answer
8 0
3 years ago
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