Evaluate -2x^2y, if x = -3 and y=-1.
-12
18
12
-18

Answer:

1. 68%

2. 95%

3. 99.7

Step-by-step explanation:

Standard deviation of mean will be 68%, 95%, and 99.73% respectively.

A statistical rule known as the empirical rule, which is also known as the three-sigma rule or the 68-95-99.7 rule, states that almost all observed data for a normal distribution will be within three standard deviations of the mean or average.

Given according to the empirical rule, 68% of observations will fall within the first standard deviation (µ ± σ), 95% will fall within the first two standard deviations (µ ± 2σ), and 99.7% will fall within the first three standard deviations(µ ± 3σ) .

Hence SD  of mean will be 68%, 95%, and 99.73%

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The number of hours Kelly drove longer than Joshua is 13/30 hours.

A fraction is written in the form of a numerator and a denominator where the denominator is greater that the numerator.

Example: 1/2, 1/3 is a fraction.

We have,

The number of hours driven by Kelly.

= 5/6 hours

The number of hours driven by Joshua.

= 2/5 hours

Now,

The difference between the number of hours driven by Kelly and Joshua.

= 5/6 - 2/5

= (25 - 12)/30

= 13/30

Thus,

Kelly drove 13/30 hours longer.

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Answer:

532

Step-by-step explanation:

A=(18*18)+ (18*8)+(8*8)

= 532

Answer:

(a)

[tex]S = \{(1,H),(2,H),(3,H),(4,H),(5,H),(6,H),(1,T),(2,T),(3,T),(4,T),(5,T),(6,T)\}[/tex]

(b)

[tex]P(A) = \frac{1}{6}[/tex]

Step-by-step explanation:

Given

The above sample space

A = Event of an occurrence of 3 or 4 then a head

(a): List out the sample space:

The rolls of the dice come first, followed by the toss of the coin.

So, the sample space are:

[tex]S = \{(1,H),(2,H),(3,H),(4,H),(5,H),(6,H),(1,T),(2,T),(3,T),(4,T),(5,T),(6,T)\}[/tex]

The number of the sample space is:

[tex]n(S) = 12[/tex]

(b): Find P(A)

First, we list out the outcomes of event A

[tex]A = \{(3,H),(4,H)\}[/tex]

The number of outcome is:

[tex]n(A) = 2[/tex]

The probability of A is then calculated as:

[tex]P(A) = \frac{n(A)}{n(S)}[/tex]

[tex]P(A) = \frac{2}{12}[/tex]

Simplify fraction

[tex]P(A) = \frac{1}{6}[/tex]

Answer:i think it would be 349

Step-by-step explanation:

Add the 3 numbers that you know.

Multiply the mean of 73 by 5 (numbers you have).

Add the numbers you are given.

Subtract the sum you have from the total sum to find your missing number.

Answer:

5 thirds

Step-by-step explanation:

Make 1 2/3 into a improper fraction. Now you have 5/3. 5/3-(1/3*5)=0

Therefore, 5x1/3=5/3=1 2/3

Answer:

This guy is wrong. 1 2/3 is equal to 5/3. But that is not the answer(like that dummy above said)

The Question is asking "How many 1/3's are in 1 2/3" (5/3)

The answer is 5, not 5/3's.

Answer:

If you write the problem down, I mean right exactly your equation I will put in the answer

Step-by-step explanation:

Or if you show me your answer to the problem I will check what you did wrong

Answer:

Each $148 = 1 pound.

Step-by-step explanation:

Answer:

i think it week 2

Step-by-step explanation:

hope this help

Answer:

$3.25 multiplied by the hour

Step-by-step explanation:

The slope of the situation if, Martha earns $15 per hour for babysitting, The parents always give her a $5 tip is $15 per hour.

A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively.

Given:

Martha earns $15 per hour for babysitting,

The parents always give her a $5 tip,

The equation for the total money earned by Martha can be written as shown below,

The total money earned = Money per hour for babysitting × number of hours + tip

Assume the total money earned is y, the number of hours is x,

y = 15x + 5

As you can see, the above equation is in slope intercept form,

Slope = $15 per hour

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Answer:

2.638, 3.16, 3[tex]\frac{7}{11}[/tex], [tex]\frac{73}{20}[/tex]

Step-by-step explanation:

Convert all the numbers as a decimal, this will make it easier to determine which value is greater or not.

Have a great day :)

Answer:

Hey:) Answer is below!

Step-by-step explanation:

Okay so the easiest thing I would do for each of these would be first to simplify them. So for the first one, 73 divided by 20, you could either do it on a calculator or just by long division. As a result, 73 divided by 20 is 3.65. The next two numbers, 2.638 and 3.16 are simplified, so you're good! Now lastly we got a mixed fraction. What you would do first, would be to multiply the left farmost number (in this case, 3) by the bottom number (which is 11). After that you would add the product of 3 and 11 (that would be 33) by 7. 33 plus 7 is 40. Finally, your number would be 40 over 11. Divide 40 by 11 (on a calculator or by long division) and you get 3.63. Now look at all your numbers, it should look like this: 3.65, 2.638, 3.16, 3.63

After that look at the number before the point (that would be 3 in the first one, 2 in the second, 3 in the third, and 3 in the fourth number). You see which one would be the smallest, and in this case it would be the second number, 2.638.  So 2.638 goes first. Then look at the first number after the point for the last three numbers (that would be 6 for the first, 1 for the third, and 6 for the fourth). 1 in the third number is the smallest, so next goes 3.16. (This is the order for now: 2.638, 3.16)

Finally look at the second number after the point for the last two numbers (that would be 5 for the first and 3 for the fourth) 3 in the fourth number is the smallest, so next goes 3.63

As a result, you get this order from smallest to largest:

2.638,3.16, 3 7/11, 73/20

Good luck:))

Answer:

Step-by-step explanation:

The function p is an absolute value equation p(x)=|x| or it could be described as the sqare root of x squared.

q(x) could be the negative of p(x) raised by two units

q(x)=-|x|+2

Answer:

6+8/2×-3+7

6+4×4

6+16

22

Answer:

-4/10+(-7/10)= -1 1/10(the bottom left one)

Step-by-step explanation:

starts from 0 and subtract 4/10.  From there you subtract 7/10 more.

Answer:

packages of buns = 1,260

packages of patties = 840

Jars of pickles = 1,680

Step-by-step explanation:

packages of buns = 3

packages of patties = 2

Jars of pickles = 4

Number of people = 420

Each person of the 420 people gets packages of buns, packages of patties, and jars of pickles in the ratio 3:2:4

packages of buns needed for 420 people = 3 × 420

= 1,260

packages of patties needed for 420 people = 2 × 420

= 840

Jars of pickles needed for 420 people = 4 × 420

= 1,680

packages of buns = 1,260

packages of patties = 840

Jars of pickles = 1,680

To feed at least 420 people minimum number of packages of buns, packages of patties, and jars of pickles needed is 1,260, 840, 1,680 respectively.

which question do you need help with?

Answer:

I don't understand the ques?

Step-by-step explanation:

Answer:

A.

Step-by-step explanation:

if you multiply 20 times 1.5 you get 30. If you multiply 30 times 1.5 you get 45. If you multiply 40 times 1.5 you get 60. If you multiply 50 times 1.5 you get 75 . meaning that y equals 1.5

Answer:

D(0.10) + Q(0.25) = 10.45

Q = D + 25 (or Q - D = 25)

Step-by-step explanation:

D = number of dimes

Q = number of quarters

D(0.10) + Q(0.25) = 10.45

Q = D - 25 (or D - Q = 25)

We multiply the number of dimes she has by $0.10, because that is the worth of each dime, and we multiply the number of quarters she has by $0.25 because that is the worth of each quarter. We then set that equal to $10.45, the overall value of her coins.

Because she has 25 less dimes than quarters, the number of dimes she has should be 25 less than the number of quarters she has. So the number of quarters she has should be equal to the number of dimes she has plus 25.

Answer:

C

Step-by-step explanation:

16 times 0.5x equals 8x.

16 times -0.75 equals -12y, so this means A and D are incorrect.

16 times 2 is 32, so this means that B is wrong, for you must multiply each number in the parentheses by 16.

Hope that helps :)

1. 9/4

2.67/8

3.17/6

4.9/2

5.16/3

6.127/12

7.37/4

8.31/6

9.40/6

10.73/7

11.34/3

12.41/2

Answer:

65

Step-by-step explanation:

just to sum all the given measurements:

19+31+15=65.

Answer:

Those points are [tex]\sqrt{34}[/tex] units apart.

a. vhysyfjgjjchddyyf if if hjd

Answer:

False

Step-by-step explanation:

I got that they intercepted at (10.857,0.4286)

y=1/2x-5

y=-3x+33

Answer:

Step-by-step explanation:

(3,-5/2)

The midpoint of the line segment with these endpoints (-3, -8) and (9, 3) will be (0, 0.5).

Let AB be the line segment and C be the mid-point of line segment AB. Let the coordinate of point A (x₁, y₁), the coordinate of point B (x₂, y₂), and the coordinate of the mid-point (x, y).

Then the coordinate of the mid-point of the line segment is given as,

(x, y) = [(x₁ + x₂) / 2, (y₁ + y₂) / 2]

The endpoints of the line segment are given below.

(-3, -8) and (9, 3)

The midpoint of the line segment is calculated as,

(x, y) = [(-3 + 3) / 2, (-8 + 9)/ 2]

(x, y) = (0/2, 1/2)

(x, y) = (0, 0.5)

The midpoint of the line fragment with these endpoints (- 3, - 8) and (9, 3) will be (0, 0.5).

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Answer:

C. -24 no real roots

Step-by-step explanation