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3 years ago

6

. According to a recent report, people smile an average of µ = 62 times per day. Assuming that the distribution of smiles is app

roximately normal with a standard deviation of σ = 18, find each of the following values: a. What proportion of people smile more than 80 times a day

1 answer:

Leokris [45]3 years ago

6 0

Idk my horse face sorry dear

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The length of a rectangle is three more than twice the width. The perimeter is 96. What are the dimensions?

SIZIF [17.4K]

Answer:

Width =15

Length =33

Step-by-step explanation:

Take width as x

And length as 2x+3

Perimeter as 96

Formula of the perimeter of a rectangle is 2l+2w

X+×+2×+3+2×+3=96

6x+6=96

6x=96-6

6×=90

X=15

Width =x and x =15 so width =15 while length =33

7 0

3 years ago

George is twice as old as Edward, and Edward's age exceeds Robert's age by 4 years. If the sum of the three ages is at least 56

marshall27 [118]

Answer:Robert's minimum age is 11 years.

Step-by-step explanation:

Let x represent George's age.

Let y represent Edward's age.

Let z represent Robert's age.

George is twice as old as Edward. It means that

x = 2y

Edward's age exceeds Robert's age by 4 years. It means that

z = y - 4

If the sum of the three ages is at least 56 years, it means that

x + y + z ≥ 56 - - - - - - - - - - 1

Substituting x = 2y and z = y - 4 into equation 1, it becomes

2y + y + y - 4 ≥ 56

4y - 4 ≥ 56

4y ≥ 56 + 4

y ≥ 60/4

y ≥ 15

z = y - 4 = 15 - 4

z ≥ 11

8 0

3 years ago

Math questions. Correct please

finlep [7]

Hello there! The answer for question 3 is 4 dogs

The answer for question 2 is D 6%, 0.66, 6/10

The answer for question 1 is 20%

Hope this helps out! :)

8 0

2 years ago

9^y-3=8<br><br> JUST DO IT!<br> PLZ...

aleksley [76]

Hello My Dear Friend!

$9^y-3=8$ <span>
We move all terms to the left:
</span> $9^y-3-(8)=0$ <span>
We add all the numbers together, and all the variables
</span> $9^y-11=0$ <span>
We move all terms containing y to the left, all other terms to the right
</span> $9^y=11$
$y=11/1$
$y=11$

I Hope my answer has come to your Help. Thank you for posting your question here in $Brainly.$ We hope to answer more of your questions and inquiries soon. Have a nice day ahead! :)

$(Ps. Mark As Brainliest IF Helped!)$

<span> $-UniteTheLeague, Justice League!!! :D$ </span>

7 0

3 years ago

How do I solve 4^-3? ( four to the power of negative three)

Liono4ka [1.6K]

4^-3

You first need to make the exponent positive. To do this put it in a fraction.

1/4^3

Now solve the exponent.

4 * 4 * 4 =
^
16*4 = 64

1/64 is your answer

7 0

3 years ago