Is -11 rational or irrational?

The constant of variation k for the inverse variation is found to be 8. When x = 32 is substituted into the formula y * x = k, we find that y = 0.25.

In problems where y varies inversely with x, it means that their product is constant. This can be represented as y * x = k, where k is the constant of variation. Given that y = 16 when x = 0.5, we can find the constant by plugging these values into the formula. Hence, 16 * 0.5 = k, so k = 8.

Now to find y when x = 32, we substitute these values into the formula. We know that y * 32 = 8, so y = 8 / 32. This simplifies to y = 0.25.

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Answer:

Neither, they both carry the same amount.

Step-by-step explanation:

We can solve this from just comparing the volumes of both boxes.

20 x 18 x 9 = 3240

18 x 18 x 10 = 3240

Both have the same volume, so they could carry the same amount.

Hope this helped! :)

Answer:

7 (2 + x ) ( 2 − x )

Answer:

660

Step-by-step explanation:

66x100=6600

Divide 6600 by 10

=660

Answer:

x = 0

y = 4

Step-by-step explanation:

Given

12x - 5y = -20

y = x + 4

Substitute x + 4 for y in the first equation

12x - 5(x + 4) = -20

Expand the bracket

12x -5 X x - 5 x 4 = -20

12x - 5x - 20 = -20

7x - 20 = -20

Add 20 to both sides to eliminate -20 on the left side

7x - 20 + 20 = -20 + 20

7x = 0

Divide both sides by 7 to isolate x

7x/7 = 0/7

x = 0

Substitute 0 for x in either equation to get y

Using equation 2, we have

y = x + 4

= 0 + 4

= 4

x = 0

y = 4

Answer:

0

Step-by-step explanation:

anything multiplied by zero is zero

Answer:

0

Step-by-step explanation:

17n

= 17(0)

= 0

When you multiply a number by zero, your answer is always going to be zero.

Hope this helps:)

Answer:

My best choice would be e

Step-by-step explanation:

The given example is of double blind study.

The correct option is (e).

A type of clinical trial in which neither the participants nor the researcher knows which treatment or intervention participants are receiving until the clinical trial is over. This makes results of the study less likely to be biased. This means that the results are less likely to be affected by factors that are not related to the treatment or intervention being tested.

Given,

Two medicines A and B.

Both are without label, neither the doctor knows nor the patient can identify the pills.

As per definition above, It is an example of double blind study .

Hence, option (e) is correct.

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Answer:

A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

answer

1, 2, 3, 4 = 90 degrees

5 = 41 degrees

6 = 39 degrees

7, 9 = 51 degrees

8, 10 = 49 degrees

step-by-step explanation

since this is a kite, the lengths p and q (the diagonals of the kite) are perpendicular to each other, so angles 1, 2, 3, and 4 are all 90 degrees

to find angle 5, we know that the kite is symmetric across the horizontal diagonal, so angle 5 would be the same as 41 degrees

to find angle 6, we also look at symmetry, so angle 6 is the same of 39 degrees

to find angle 7, all three angles in a triangle, bottom left, must add up to 180. since we know angle 3 = 90 and angle 6 = 39, angle 7 = 180 - 90 - 39 = 51 degrees

because of symmetry, angle 9 would be equal to angle 7 = 51 degrees

to find angle 8, all three angles in a triangle, bottom right, must add up to 180. since we know angle 4 = 90 and angle 5 = 41, angle 8 = 180 - 90 - 41 = 49

because of symmetry, angle 10 would be equal to angle 8 = 49

Answer:

A) x +  y =  - .7

B) -3x + y = 11.7

We'll multiply A) by 3

A) 3x + 3y = -2.1  the add it to B)

B) -3x + y = 11.7

4 Y = 9.6

Y = 9.6 / 4 = 2.4

-3x  + (9.6 / 4) = 11.7

-3x = 9.3

x = -3.1  

Step-by-step explanation:

Final answer:

The length of the female dust mite, 0.42 millimeters, is written in scientific notation as 4.2 × 10[tex]10^{-1}[/tex]millimeters.

Explanation:

To write the measurement of a female dust mite, which is 0.42 millimeter long, in scientific notation, we first identify the most significant digit and the decimal point. In scientific notation, numbers are typically written in the form of a single digit from 1 to 9, followed by a decimal point and the remaining significant digits, and then multiplied by 10 raised to the appropriate exponent.

The number 0.42 can be written as 4.2 times 10 to the power of negative one (because the decimal point has been moved one place to the right to place it after the first non-zero digit, 4).

So, in scientific notation, the length of a female dust mite is 4.2 × [tex]10^{-1}[/tex] millimeters.

Answer:

63 votes

Step-by-step explanation:

10% of 70 is 7

70-7=63

Answer:

6 or 7 votes

Step-by-step explanation:

Answer:

1/7

Step-by-step explanation:

i learned this arealdy

The probability of drawing at least one red marble from a bag containing 3 blue and 5 red marbles in two draws without replacement is 19/28.

To find the probability of drawing at least one red marble from a bag with 3 blue and 5 red marbles, with one draw already taken, we calculate the probability of not drawing a red marble and subtract that from 1. Since there are more red than blue marbles, the probability of drawing a red one on the first draw is higher. However, the problem states that the marbles are not replaced after drawing, so the probabilities change with every draw.

There are two ways to not draw a red marble in two draws:

First draw: blue, Second draw: blue.

First draw: red, Second draw: blue.

Let's calculate these probabilities. For the first case, there's a 3/8 chance of drawing blue first, and then 2/7 chance of drawing blue again, since one blue marble has been removed, which equals to 3/8 * 2/7 = 6/56 or 3/28. For the second case, there is a 5/8 chance of drawing red first, and then a 3/7 chance of drawing blue, equalling 5/8 * 3/7 = 15/56. The sum of these probabilities is 3/28 + 15/56 = 9/28.

Therefore, to find the probability of at least one red, we subtract the summed probabilities from 1: 1 - 9/28 = 19/28.

Thus, the probability of drawing at least one red marble is 19/28.

Answer: B (x,y) --> (x + 4, y - 2)

Step-by-step explanation: When you add -5+4=-1, and when you subtract 2 from 4 it equals to 2, which gives you the second coordinates, this means that x+4 and y-2 is the answer.

Answer:

sorry i dont quite understand, were you given more information

Step-by-step explanation:

The required volume of the rectangular prism is unknown and cannot be determined based on the given information.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

Here,
The volume of a rectangular prism is given by the formula:

Volume = length x width x height

In this case, we are given that the length and width of the rectangular prism are 4 units, but we don't have any information about the height. So, we cannot determine the volume of the rectangular prism without knowing its height.

Therefore, the volume of the rectangular prism is unknown and cannot be determined based on the given information.

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Final answer:

Using the order of operations, first calculate the value within the parentheses, perform the division, then proceed with the addition, and finally subtract to find that the solution to the expression 8+24 ÷ (2×6) - 4 is 6.

Explanation:

To address the problem 8+24 ÷ (2×6) - 4, the correct application of the order of operations, known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction), is required.

First, handle the expressions inside the parentheses:

Therefore, the final answer to the expression is 6.

Answer:

x=-1

Step-by-step explanation:

x − 7 = 46 − 9(x + 7)

distribute

x-7 = 46 - 9x -63

Combine like terms

x-7 = -9x-17

Add 9x to each sid

x-7+9x = -9x+9x -17

10x-7 = -17

Add 7 to each side

10x -7+7 = -17+7

10x = -10

10x/10 = -10/10

x = -1

Answer:

x = -1

Step-by-step explanation:

x − 7 = 46 − 9(x + 7)

x - 53 = -9x - 63

10x = -10

x = -1

Answer:

Step-by-step explanation:

favorable events=x

total number of events=x+y

P=(favorable events)/(total number of events)=x/(x+y)

Answer:

The answer is polar.

Step-by-step explanation:

I just finished the quiz

Answer:

The volume of the pyramid on the left is greater by 8 inches.

The volume of the pyramid on the left is greater by 8 inches.

The answer is option A.

If the base of the pyramid is in the shape of a pentagon (base with 5 sides), then it is called a pentagonal pyramid. As the pentagon has 5 sides, then the pentagonal pyramid has the following properties: No. of Faces: (5+1)=6. No.of Vertices: (5+1)=6.

The pyramids of Giza, Egypt form the most common example of the three-dimensional pyramid geometric shape in real life. The Great Pyramid of Giza is one of the oldest and largest pyramids present in the world.

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Answer:

3 pounds

Step-by-step explanation:

1. 50 + 50 = 100

2. 100 / 5 = 20

3. 60 / 20 = 3

Each chicken eats approximately 0.3333 pounds of feed per day, which is calculated by dividing the total feed (100 lbs) by the number of days (60) and then by the number of chickens (5).

To calculate how much chicken feed each chicken eats a day, we need to start by understanding the total amount of feed Ryan bought. He bought two 50 lbs bags, which is a total of 100 lbs of chicken feed. Since the feed needs to last 60 days for 5 chickens, we will divide the total feed by the number of days and then by the number of chickens.

First, we convert the weight of the feed into pounds (if it is not already in pounds). We know there are 100 lbs of feed in total.

Next, we divide the total weight of the feed by the number of days to find out how much feed is used per day:
100 lbs / 60 days = 1.6667 lbs per day (for all 5 chickens together).

Finally, we divide the daily feed consumption by the number of chickens to find out how much each chicken eats per day:
1.6667 lbs per day / 5 chickens = 0.3333 lbs per chicken per day.

Therefore, each chicken eats approximately 0.3333 pounds of feed a day.

Answer:9/12

Step-by-step explanation:

1/3 is the same as 4/12

4/12 +5/12=9/12

Kevin has to pay $757.86 for the round trip.

A cost function is a mathematical formula used to chart how production expenses will change at different output levels.

How find how much will Kevin have to pay for the round-trip?

Given Miguel, Sterling, and Kevin plan to split the cost of a round-trip car ride from Los Angeles, California, to El Paso, Texas, equally. The total cost of the trip from Los Angeles to El Paso was $1136.79, and they expect that the trip back will cost the same.

It’s B because 1136.79 x 2 is 2273.58.

2273.58/3 because there are three people splitting the ticket is 757.86.

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Alright!

To start this problem, we need to come up with equations that represent both of the Hosts' services

Key equation:

y = mx + b

x = the # of hours

Host A:

An initial $45 means this will be our constant

$16.25 per hour means it needs the variable x

Host A equation: y = 16.25x + 45

Host B:

An initial $51 means this will be our constant

$13.50 per hourmeans it needs the varible x

Host B equation : y = 13.50x + 51

To find the approximate number of hours (x) when both hosts charge the same amout, we must set their equations equal to each other.

16.25x + 45 = 13.50x + 51

Now, Solve!

16.25x = 13.50x + 51 - 45

16.25x = 13.50x + 6

16.25x - 13.50x = 6

2..75x = 6

now divide to find x!

x = 6 ÷ 2.75

x = 2.18

but we must round to the nearest tenth, so your final answer is

x = 2.2 hours!

Hope I helped! Comment if you have any questions about my solution :)

Answer:

11 must be the fee for each delivery made

Step-by-step explanation:

p = 11d − 55

The y deduct the daily fee

deduct means subtract which means the daily fee is 55

d is the number of deliveries in one day

delivery company pays its drivers a fixed fee for each delivery made

Since d is the number of delivers, 11 must be the fee for each delivery made

Answer:

fee paid per delivery

Step-by-step explanation:

Answer:24r+48h= $1248

Step-by-step explanation:

24*36+48*8

864 + 384 = 1248

Not sure if it's correct I'm not brilliant with equations xx

Answer:

Correct

24(36) + 24(2) x 8 =

Step-by-step explanation:

Cost of your guitar = $ 600

Let your friend's guitar's cost be = n

According to the question =

Your guitar costs $ 40 more than twice the cost of your friend's guitar which is n ,but your guitar's cost is $ 600.

So ,the linear equation for this will be =

= 2n+$40 = $600

= 2n = $600-$40

= 2n = $ 560

= n = $ 560/2

= n = $ 280

The cost of your friend's guitar is $280 by creating an equation based on the cost comparison to your own guitar, and then solving for the variable representing your friend's guitar's cost.

You paid $600 for a new guitar, which costs $40 more than twice the cost of your friend's guitar. To find the cost of your friend's guitar, let's denote the cost of your friend's guitar as x. According to the information given, your guitar's cost can be represented by the equation 2x + $40 = $600. Solving for x will give us the following steps:

Subtract $40 from both sides of the equation: 2x = $600 - $40.

This simplifies to 2x = $560.

Divide both sides by 2: x = $560 / 2.

Therefore, x equals $280.

The cost of your friend's guitar is $280.

Answer:

D. (y-4)^2/12^2 + (x-2)^2/6^2=1

Step-by-step explanation:

Took the quiz.

Answer:

d

Step-by-step explanation:

Answer:

2 fish

Step-by-step explanation: