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3 years ago

Just need help with these 2 questions

Mathematics

1 answer:

liberstina [14]3 years ago

5 0

Answer:

I wanna help but I can't see it properly

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Use the drop-down menus to locate integers on the number line. A B C D 5 -4 3 2 - 1 + 3 4 1 2 5 6 7 B В C < D

vichka [17]

Answer:

can you take a picture of it? the format you put it in is confusing.

5 0

3 years ago

What is the y-intercept of the graph of 4y - 1= 3

IceJOKER [234]

Answer:Using the slope-intercept form, the y-intercept is 1

3 0

3 years ago

Suppose you have an experiment where you flip a coin three times. You then count the number of heads. a.) State the random varia

coldgirl [10]

Answer:

The answer to each point is below

Step-by-step explanation:

We will solve point by point:

a) We have to:

Random variable X = number of heads

Let, H => heads, T => tails

b) We have that the combinations are

TTT, TTH, THT, THH, HTT, HTH, HHT, HHH

Number of Heads (X) 0 1 2 3

Probability (P) 1/8 3/8 3/8 1/8

c) attached the histogram.

d) We have the following:

Mean = E (X) = 0 * 1/8 + 1 * 3/8 + 2 * 3/8 + 3 * 1/8

m = 1.5

The mean is 1.5

e) E (X ^ 2) = 0 * 1/8 + 12 * 3/8 + 22 * 3/8 + 32 * 1/8 = 3

Variance = E (X ^ 2) - (E (X)) ^ 2

Var = 3 - (1.5) ^ 2

Var = 0.75

The variance is 0.75

f) standard deviation = (Var) ^ (1/2) = (0.75) ^ (1/2) = 0.866

sd = 0.866

the standard deviation is 0.866

g) P (2 or more heads) = 3/8 + 1/8 = 0.5

The probability is 50%

h) P (two heads) = 3/8 = 0.375

It is likely that out of 8 times of 3 flips, 3 times we can observe two heads out of 3, therefore it is not unusual.

6 0

3 years ago

Is Abc A right triangle? (HELP)

ollegr [7]

<h2>Hello There today we will solve your problem</h2>

<em>Response-</em>

<em>ABC is absolutely a right triangle</em>

<em>we can use the pythagorean theorem to solve this</em>

<h3><em>Definitions</em></h3>

Right Triangle - <em>A right triangle or right-angled triangle, or more formally an orthogonal triangle, is a triangle in which one angle is a right angle. The relation between the sides and other angles of the right triangle is the basis for trigonometry. The side opposite to the right angle is called the hypotenuse.</em>

Pythagorean Theorem - <em>In mathematics, the Pythagorean theorem, or Pythagoras' theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.</em>

<em>To use to the Pythagorean Theorem it is</em>

$A^2+B^2=C^2$