Select the expression that represents the following statement: multiply 6 by 2, and then subtract 4. 1- 2 − 4 x 6
2- 6 x 2 − 4
3- 6 + 6 + 4 − 2
4- 6 x 4 − 2

Answers

Answer 1

Answer:

Answer: 2. 6 X 2 -4

Step-by-step explanation:

Only 2 fits the descriptions, where 6 is multiply 2, 6 x 2. And we subtract 4 from it, 6 x 2 -4.

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How many times would a coin have to show heads in 50 tosses to have an experimental probability of 20% more than the theoretical probability of getting heads?

Answers

The theoretical probability of getting heads is 50%. 50% of 50 is 25. So, 20 % more than 50% is 20% * 25 + 25 = 5 + 25 = 30. That means that the coin should show 30 heads fo have an experimental probability of 20% more than the theoretical probability. You can check that 30 out of 50 is 0.6. Which is 0.1 more than 0.5. And 0.1 is 20% of 0.5. Then 0.6 is 20% more than 0.5.

Final answer:

In a series of 50 coin tosses, a coin needs to land heads 30 times to have an experimental probability 20% greater than the theoretical probability.

Explanation:

The subject of focus here is the allusion to the theory of probability, particularly in relation to a fair coin flip. The theoretical probability of obtaining either heads or tails in a coin flip is 0.5. However, the student is interested in having an experimental probability 20% greater than the theoretical probability.

We can first calculate the theoretical counts of expected heads per 50 tosses, which is (0.5 * 50) = 25. This result represents the notion that if a coin is thrown 50 times, on average, will land heads 25 times based on the theoretical probability.

To achieve an experimental probability 20% greater than the theoretical probability, we need to find a count of heads that corresponds to a probability that is 20% more than 0.5 (the theoretical probability). This new probability is therefore 0.6 and the corresponding count of heads required would be (0.6 * 50) = 30. Hence, in 50 tosses, the coin would need to show heads 30 times to have an experimental probability 20% greater than the theoretical probability of getting heads.

Learn more about Probability here:

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2x2 + 6x + 5 = 0 what are the real roots for the quadratic equation

Answers

$2x^2 + 6x + 5 = 0$

$x= (-b+/- √(b^2 -4ac) )/(2a)$

$x= (-(6)+/- √((6)^2 -4(2)(5)) )/(2(2))$

$x= (-6+/- √(36 -40) )/(4)$

$x= (-6+/- √(-4) )/(4)$

$x= (-6+/- i√(4) )/(4)$

$x= (-6+/- 2i )/(4)$

NO REAL ROOTS

$2x^2+6x+5=0\ \ \ \ /:2\n\nx^2+3x+2.5=0\n\nx^2+2x\cdot1.5=-2.5\n\nx^2+2x\cdot1.5+1.5^2-1.5^2=-2.5\n\n(x+1.5)^2-2.25=-2.5\n\n(x+1.5)^2=-2.5+2.25\n\n(x+1.5)^2=-0.25 < 0\ aren't\ real\ roots\ because\ for\ x\in\mathbb{R},\ a^2\geq0$

What kind of angle is shown in the image below

Answers

ACUTE ANGLE.
this is because the angle is less than 90 degree and greater than 0 degree

This Is An Acute Angle.
You Know This Because:
Acute Angles Are Angles That Measure Less Than 90 Degrees.
A Right Angle Is An Angle That Measures Exactly 90 Degrees
An Obtuse Measures More Than 90.

1/3 cube root 27 <=w

Answers

3³ = 27

∛27 = 3

1/3 of 3 = 1

x $\geq$ 1

1
Is
Correct answer indeed

Marquis begins a career making $53,000 per year. Each year, he is to receive a $1,600 raise. After 25 years, how much total money will Marquis have earned from this career?

Answers

Answer:

Step-by-step explanation:

Ed2021

Answer:

b$1,805,000

Step-by-step explanation:

You have two biased coins. coin a comes up heads with probability 1 / 4. coin b comes up heads with probability 3 / 4. however, you are not sure which is which, so you choose a coin randomly and you flip it. if the flip is heads, you guess that the flipped coin is b; otherwise, you guess that the flipped coin is a. a) True b) False