The variables x and y represent nonzero rational numbers. Which situation could be solved using the product of xy, where xy represents a negative value? the depth of a scuba diver if he dives x feet below sea level and then rises y feet the amount of juice Susan drinks in x days if she drinks y fluid ounces of juice each day the change in degrees if the temperature decreases by x degrees per day for y days the change in the price of an item if the price is increased by x dollars one month and decreased by y dollars the next month

Answer:

20 and 40

Step-by-step explanation:

20 + 20 is 40, and 40 - 20 is 20. There is a 20 difference, and 40 is double 20. Therefore, the answers is 20 and 40.

Hope this helps :)

Happy Early Valentine's Day!

Brainliest, Please!

Answer:

The answer is "\(\frac{26}{7}\)"

Step-by-step explanation:

The whole question can be found in the file attached.

\(\to x + \frac{5}{7} = \frac{31}{7}\\\\\)

Subtracting the \(\frac{5}{7}\) from both sides of the equations:

\(\to x +\frac{5}{7} - \frac{5}{7} = \frac{31}{7} - \frac{5}{7} \\\\\)

                    \(= \frac{31-5}{7} \\\\= \frac{26}{7} \\\\\)

Answer:

120 = 1 x 120, 2 x 60, 3 x 40, 4 x 30, 5 x 24, 6 x 20, 8 x 15, or 10 x 12. Factors of 120: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120. Prime factorization: 120 = 2 x 2 x 2 x 3 x 5, which can also be written 120 = 2³ x 3 x 5.

Step-by-step explanation:

The probability of expected number of games played is given by (1/(1-p))/p, and when p=1/2, the expected number of games played is 2.

Suppose two teams, A and B, are playing a series of games, and the probability of team A winning a single game is given by p. The probability of team B winning a single game is then (1-p). The goal is to determine the expected number of games that are played until one team wins 4 games, which means they win the series.

To calculate this, we can think of each game as a Bernoulli trial, with a success defined as a win for team A.

The number of games played can be modeled by a geometric distribution, where the expected number of trials until the first success (winning 4 games) is given by 1/p. In this case, we can think of each game as a trial until a success (winning 4 games), and the expected number of trials until the first success is 1/p.

Now, we can calculate the expected number of games played by multiplying the expected number of trials until the first success by the average number of failures before the first success. The average number of failures before the first success is given by 1/(1-p), so the expected number of games played is (1/(1-p))/p.

Finally, if p=1/2, then the expected number of games played is 2. This makes sense, as in a fair game, both teams have an equal chance of winning, and it would be expected to take an average of 2 games to determine a winner of the series.

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Answer:

Geometric.

Step-by-step explanation:

It is Geometric because there is a common ratio between the terms.

50p/100p = 1/2

25p/50p = 1/2

The common ratio is 1/2.

Each term is obtained by multiplying by 1/2, so the next term in this progression is 25p * 1/2 = 12.5p.

Answer:

0.9

Step-by-step explanation:

Answer:

0.5y

Step-by-step explanation:

the answer is 0.5y

Answer:

0.5y

Step-by-step explanation:

when you multiply a negative by a negative it becomes a positive, therefore -0.5 x -y = 0.5y

Answer:

72 hope it helps............

Answer:

72

is you answer because 8×9=72

Answer:

0.25 feet

7.62 centimeters

3 inches

Step-by-step explanation:

Not really a clear question-

The total sale of the bedding set including 5% sale tax is $69.66

An equation is an expression that shows the relationship between two or more variables and numbers.

Discount = 20% of 86 = 0.2 * 86 = 17.2

Selling price of bed = 5% of 17.2 = 0.05 * 17.2 = 0.86

Total sale = 86 - 17.2 + 0.86 = 69.66

The total sale of the bedding set including 5% sale tax is $69.66

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Answer:

= −135.47x

Step-by-step explanation:

^^^^^^^^^^^^^^^

Answer:

5.5

Step-by-step explanation:

divide both sides

The probability that the group has exactly one math major, two computer science majors, and one creepy wizard is 900/12,650.

a. The probability that no creepy wizards are chosen can be found by dividing the number of ways to choose four students without any creepy wizards by the total number of possible groups of four students.

The number of ways to choose four students without any creepy wizards is the number of ways to choose 4 students from the 10 math and computer science majors.

This is given by the combination (4 choose 4) times (6 choose 0) which simplifies to 1. The total number of possible groups of four students is the combination of 25 students taken 4 at a time, which is (25 choose 4) = 12,650. Therefore, the probability that no creepy wizards are chosen is 1/12,650.

b. The probability that the group has exactly one math major, two computer science majors and one creepy wizard can be found by dividing the number of ways to choose one math major, two computer science majors, and one creepy wizard by the total number of possible groups of four students. The number of ways to choose one math major from the 4 math majors is (4 choose 1) = 4.

The number of ways to choose two computer science majors from the 6 computer science majors is (6 choose 2) = 15. The number of ways to choose one creepy wizard from the 15 creepy wizards is (15 choose 1) = 15.

Therefore, the total number of ways to choose one math major, two computer science majors, and one creepy wizard is 4 x 15 x 15 = 900. The total number of possible groups of four students is the same as in part (a), which is (25 choose 4) = 12,650.

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The difference in the interest that the account will have earned at the end of 10 years is of:

D. $3.01.

The amount of interest earned, in compound interest, after t years, is given by:

\(I(t) = P\left(1 + \frac{r}{n}\right)^{nt} - P\)

In which the variables are listed as follows:

In the context of this problem, these parameters are given as follows:

P = 250, r = 0.016, n = 12, t = 10.

Hence the interest earned by account 1 is:

\(I(10) = 250\left(1 + \frac{0.016}{12}\right)^{12 \times 10} - 250 = 43.35\)

For simple interest, the amount of interest earned is:

I(t) = Prt.

Hence:

I(10) = 250 x 0.016 x 10 = 40.

Hence the difference is:

43.35 - 40 = $3.35.

Which is closest to option D.

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Answer: probability distribution is a function of a discrete variable whose integral over any interval is the probability that the random variable specified by it will lie within that interval.

Using the rule of 72, startfraction 72 over t endfraction, Manuel will double his money first, in approximately 9 years. Option C is the answer.

The rule of 72 is a quick and simple way to estimate the number of years it takes for an investment to double given the

interest rate. It is calculated by dividing 72 by the interest rate.

For example, if an investment has an interest rate of 8%, it will take approximately 72 / 8 = 9 years to double the investment.

Applying this rule, we can estimate the time it will take for Sylvia's investment to double: 72 / 8 = 9 years.

And for Manuel's investment to double: 72 / 7.25 = 10 years.

Since Manuel's investment will double in approximately 9 years, he will double his money first.

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Answer:

Step-by-step explanation:

21x.30=6.3

21-6.3= 14.7

If  shirt cost $21 last month and the price decreased by 30% then the new price is $14.7.

percentage, a relative value indicating hundredth parts of any quantity.

Given that a  shirt cost is $21 last month.

The  price decreased by 30% in this month.

We have to find the new price.

To find this we have to find 30 percentage of 21.

Convert 30 % to decimal value by dividing with 100 and then multiply the decimal value with $21.

30/100× 21

0.3×21

$6.3

So the amount decreased is $6.3

The new price we get by subtraction $6.3 from $21.

21-6.3

New price = $14.7

Hence, if  shirt cost $21 last month and the price decreased by 30% then the new price is $14.7.

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Step-by-step explanation:

Triangle 1: c = 7 cm

Triangle 2: c = 4 cm

Triangle 3: c = 3 cm

Triangle 4: c = 6 cm

The lengths of line c vary and can be any value greater than 0 and less than (a + b) = (2 + 5) = 7 cm. Therefore, the inequality that shows the possible lengths for line c is 0 < c < 7.

Using strategy 1 (in your head), divide 60m by 10m to get 6, then multiply that number by one to get 6cm. the length on drawing is 6cm

Procedure 2 (proportions)

Create a proportion first.

We know that 1 cm equals 10 metres, so we place them on a fraction (the operation is unaffected by the denominator or numerator). However, we don't know how many cm equal 10m, so we make that into a variable, in this case x.

1cm x cm

——— ———

100m 60m

Go diagonally to where the variables have already been put in to solve a proportion. You are unable to calculate 60 metres and x centimetres because you are unsure of x. Yet you can travel 60m. Start by multiplying 1 by 30 to reach the number 60. The result of multiplying 60 by 10m is x. This will equal 6.

Thus, your response is 6.

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1885.5 m^3 of water will fill the container.

To find how many cubic feet of water will it contain:

Given -

The pool comprises a 12-foot-radius cylinder with a height of 4.5 feet.

The volume of the water in this section of the cylinder will be equal to the volume of the cylinder formed.

Therefore, 1885.5 m^3 of water will fill the container.

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The complete question is given below:

Lauren has an above-ground pool. To keep the pool's skimmer working well, the water level must be 4 inches from the top of the pool. When the pool is filled to this recommended level, approximately how many cubic feet of water will it contain? Use π = 3.14

A cylinder with a radius of 12 feet and a height of 4.5 feet.

After set s1.addAll(s2), s1 is [1, 2, 5, 2, 3, 6].

After performing the operation s1.addAll(s2) on sets s1 [1, 2, 5] and s2 [2, 3, 6], the set s1 would become[1, 2, 5, 2, 3, 6].

To determine the value of s1, the following steps has to be taken:

1. Start with sets s1 [1, 2, 5] and s2 [2, 3, 6].

2. Apply the addAll operation with set s2: [2, 3, 6]

3. Add each element from set s2 to set s1, while avoiding duplicates (since sets cannot have duplicate elements).

4. Therefore, suppose if set s1 is [1, 2, 5] and set s2 is [2, 3, 6] then, after s1.addAll(s2), the set s1 becomes [1, 2, 5, 2, 3, 6].

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The given equation of the formula, y = mx + b, on solving for m by isolating it gives, m = (y - b)/x, making option C the right choice.

In the question, we are given the formula y = mx + b and are asked to solve the given formula for m.

To solve the equation for m, we need to isolate m to one side of the equation, and all other variables to the other side. This can be done as follows:

The given equation is:

y = mx + b.

Changing the sides of the equation gives us:

mx + b = y.

Subtracting b from both sides of the equation gives us:

mx + b - b = y - b,

or, mx = y - b {Simplifying}.

Dividing both sides of the equation by x gives us:

mx/x = (y - b)/x,

or, m = (y - b)/x {Simplifying}.

Thus, we have now isolated m to one side of the equation.

Thus, the given equation of the formula, y = mx + b, on solving for m by isolating it gives, m = (y - b)/x, making option C the right choice.

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Answer:

The answer is below

Step-by-step explanation:

The Richter scale measures the magnitude, M, of an earthquake as a function of its intensity, I, and the intensity of a reference earthquake, . Which equation could be used to find the intensity of an earthquake with a Richter scale magnitude of 4.8 in reference to an earthquake with an intensity of 1?

Solution:

The Richter magnitude scale was developed in 1935 by Charles F. Richter. The Richter scale is used to measure the strength of earthquakes.

The magnitude of an earthquake (M) using a Richter scale is given by:

\(M=log(\frac{I}{I_o} )\\\\Where\ I\ is\ the\ intensity\ of\ the \ earthquake,I_o\ is \ the\ intensity\ of\\the\ reference\ earthquake.\\\\Given\ that\ M=4.8,I_o=1.\ Hence:\\\\4.8=log(\frac{I}{1} )\\\\4.8=log(I)\\\\I=e^{4.8}\\\\I = 121.5\)

If xi and yi are positively correlated in the sample, then the estimated slope is :
b. greater than zero.

When xi and yi are positively correlated, it means that as the value of xi increases, the value of yi also increases, and vice versa. In this case, the estimated slope of the regression line will be greater than zero, indicating a positive relationship between xi and yi.

The estimated slope, often denoted as "b" in a simple linear regression model (y = a + bx), quantifies the change in the dependent variable (yi) for each unit change in the independent variable (xi). In the case of a positive correlation, the estimated slope (b) would be greater than zero, indicating that for each unit increase in xi, yi is expected to increase by an amount equal to the estimated slope (b).

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There are approximately 1,716,190 ways the business can pick 8 applicants to interview from a pool of 31 applicants.

To determine the number of ways the business can pick 8 applicants to interview from a pool of 31 applicants, we can use the concept of combinations.

Specifically, we need to calculate the number of combinations of 31 applicants taken 8 at a time.

The number of combinations, denoted as "C(n, r)" or "nCr", represents the number of ways to choose r items from a set of n items without regard to their order.

The formula for combinations is:

C(n, r) = n! / (r!(n - r)!)

where n! denotes the factorial of n, which is the product of all positive integers up to n.

Using this formula, we can calculate the number of ways to pick 8 applicants from a pool of 31:

C(31, 8) = 31! / (8!(31 - 8)!)

Simplifying further:

C(31, 8) = 31! / (8! * 23!)

Since calculating factorials of large numbers can be cumbersome, we can simplify the expression further by canceling out common terms in the numerator and denominator:

C(31, 8) = (31 * 30 * 29 * 28 * 27 * 26 * 25 * 24) / (8 * 7 * 6 * 5 * 4 * 3 * 2 * 1)

C(31, 8) = 69,090,840 / 40,320

C(31, 8) ≈ 1,716,190

Therefore, there are approximately 1,716,190 ways the business can pick 8 applicants to interview from a pool of 31 applicants.

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Lisa also cleans windows on the weekend. The correct answer is c = 10w + 5

So, she charges $10 a window plus a $5 flat supply fee, we are going to add 10 and 5 to find are answer and we are going to use c:

→ w = 10

→ 10w

$5 in the other hand, is independent.

→ + 5

→ c = 10w + 5

Therefore, Lisa also cleans windows on the weekend. The correct answer is c = 10w + 5

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Answer:

The total of the sum of the angles has to be 180°.

We already know there is an angle which is 90°, so the sum of the two reaming angles has to be 90°. (180-90).

so: 3x+4x-1=90

7x-1=90

7x=91

x= 13

so: 3*(13)= 39

and 4*(13)-1= 51

Answer:

the speed of the plane with no wind is 700 km/h and the speed of the wind is 100 km/h

Step-by-step explanation:

Let V be the speed of the plane and v the speed of the wind. Down current, they are in opposite directions, and the plane travels a a distance of 4000 km in 5 hours,so

5(V - v) = 4000

V - v = 800    (1)

For upwind movement, since the plane travels 3000 km in 5 hours, so

5(V + v) = 3000

V + v = 600 (2)

adding equations (1) and (2), we have

V - v = 800

+

V + v = 600

2V = 1400

V = 1400/2 = 700 km/h

subtracting equations (2) from (1), we have

V - v = 800

-

V + v = 600

-2v = 200

v = -200/2 = -100 km/h

So, the speed of the plane with no wind is 700 km/h and the speed of the wind is 100 km/h