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3 years ago

11

Flip a coin 4 times and calculate the experimental probability of the coin landing heads up. Flip a coin 4 more times to increas

e the total number of trials to 8. What is the experimental probability of the coin landing heads up?

2 answers:

Allushta [10]3 years ago

8 0

Answer:

3/4 and 5/8

Step-by-step explanation:

MaRussiya [10]3 years ago

7 0

Answer:

0.35 Not sure

Step-by-step explanation:

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The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain?

s344n2d4d5 [400]

{k^2 + 2k + 1 = 25, k^2 + 2k + 1 = 64}
{k^2 + 2k - 24 = 0, k^2 + 2k - 63 = 0}
{(k - 4)(k + 6) = 0, (k - 7)(k + 9) = 0}
{k = -6, 4, -9, 7)
Therefore, range = {-9, -6, 4, 7)

3 0

3 years ago

Answer the question please.

Mariulka [41]

8/5x = 1

or

1.6x = 1

Work:

Add 7/3x and 1/3x to make 8/3x. Equation: 8/3x = 1 + 5/3x

Divide 8/3x by 5/3x, looks like 8 over 3 times 3 over 5. 3s cancel each other out, leaving 8/5x. Equation: 8/5x = 1

If needed to be simplified, 8/5 = 1.6.

6 0

3 years ago

Evaluate The diagram below.<br> Given: straight lines AD and CE.<br> HELP ASAP‼️‼️

jenyasd209 [6]

Answer:

<CFD =62°

<AFB= 90°

Step-by-step explanation:

here you have a vertical angle, so to simply put it the answer on one side of the angle is the same answer for the opposite side of the angle. knowing this, angle <AFE is 62° and <CFD is on the opposite side making the angle the same(62°). the opposite angle of <AFB is <EFD which is 118° but both <AFB and <AFC equal 118° so you subtract 118° to <AFC degree which is 28° and you get 90°.

i hope this makes sense im not good at explaining. if anyone has a better explanation feel free to correct me.

6 0

3 years ago

Triangle JKL is dilated from the origin at a scale factor of 10 to create triangle J′K′L′.Select the option that completes the s

Aneli [31]

Given: Triangle JKL is dilated from the origin at a scale factor of 10 to create triangle J′K′L′.

Required: Correct option that complete the statement.

Explanation:

Now, triangle is dilated from the origin at a scale factor of 10.

So, the sides will become larger, but angles will remain the same.

Hence, the triangles will be similar as sides will be in proption (SSS rule).

So, The triangles are similar because their corresponding sides are proptional and their corresponding angles are congurent.

Final Answer: Second group is correct answer.

5 0

1 year ago

If f(x) = 5x + 4, which of the following is the inverse of Ax)?

Levart [38]

Answer:

$f^{-1}$ (x) = $\frac{x-4}{5}$

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = 5x + 4 ( subtract 4 from both sides )

y - 4 = 5x ( divide both sides by 5 )

$\frac{y-4}{5}$ = x

change x to $f^{-1}$ (x) and y back to x, thus

$f^{-1}$ (x) = $\frac{x-4}{5}$

6 0

3 years ago