Bars cost $4. 50 after a 10% discount, what was the price before the discount

Answer:a

Step-by-step explanation:s

Step-by-step explanation:

In a parallelogram, opposite sides are equal in length. Therefore, we can set AD equal to CB and DC equal to AB to get two equations:

AD = CB

84 = 5x + 24

DC = AB

28 = 3x - 8

Solving the first equation for x, we get:

84 = 5x + 24

60 = 5x

x = 12

Solving the second equation for x, we get:

28 = 3x - 8

36 = 3x

x = 12

Since both equations give us x = 12, we can conclude that the value of x that makes ADCB a parallelogram is x = 12.

To verify, we can check that the opposite sides are equal in length:

AD = 84 cm

CB = 5x + 24 = 5(12) + 24 = 84 cm

DC = 28 cm

AB = 3x - 8 = 3(12) - 8 = 28 cm

Both pairs of opposite sides have the same length, so ADCB is a parallelogram when x = 12.

Answer:

x = 3.0

Step-by-step explanation:

This makes ADCB a parallelogram, with AD as its base and AB and CB as its two parallel sides.

The length of Alice’s step is 0.6 m.

The length of Basil’s step is 0.8 m.

Since Basil takes 100 fewer steps than Alice to walk 240 m;

the number of steps Basil takes = (240/A) - 100.

Basil's step is 20 cm longer than Alice's step;

B = A + 0.2

The distance each person walks is calculated as;

A(240/A) = (A + 0.2) [(240/A) - 100]

240 = 240 - 100A + 48/A - 20

0 =  - 100A + 48/A - 20

100A - 48/A = -20

100A² - 48 = -20A

100A² + 20A - 48 = 0

Solve for A using formula method;

A = 0.6 m

Basil's step length:

B = 0.6 + 0.2

B = 0.8 m

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The second term in the sequence is 0.

To solve the problem, we can use the fact that each term after the second is the sum of the two preceding terms. Let's call the first term a and the second term b. Then, according to the problem, we have:

a = 3 (the first term is 3)

b = ?

c = a + b = 3 + b

d = b + c = b + (3 + b) = 2b + 3

e = c + d = (3 + b) + (2b + 3) = 3b + 6

We also know that the fifth term is 3, so we can set e equal to 3 and solve for b:

3b + 6 = 3

3b = -3

b = -1

Therefore, the second term in the sequence is 0, since each term after the second is the sum of the two preceding terms and the first term is 3.

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Note that the unit rate of change of the equation is 0.32, and the one of the graph is 1, so the correct option is B.

We define the unit rate of change as the slope or constant of proportionality.

y = 0.32 * x

The unit rate of change is 0.32

In the graph we can see that for each unit moved in horizontally, the line moves one unit vertically, then the unit rate of change is just 1.

y =  x

Then we can conclude that the graph has the greater unit rate of change.

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The point estimate of the population mean is 2.02 liters, and the 95% margin of error for this estimate is 0.0197 liters. To reduce this margin of error to 1/3 of its current size, a sample size of at least 121 bottles would be required.

The point estimate of the population mean is simply the sample mean, which is 2.02 liters.
To calculate the margin of error, we need to use the formula: margin of error = z * (standard deviation / sqrt(sample size)), where z is the critical value for a 95% confidence interval (which is 1.96), and sqrt stands for square root. Plugging in the given values, we get: margin of error = 1.96 * (0.07 / sqrt(50)) = 0.0197 liters.
To make the margin of error 1/3 as large as it is in part (b), we need to divide the margin of error by 3, and then solve for the required sample size in the margin of error formula. That is: 0.0197 / 3 = z * (0.07 / sqrt(sample size)), where z is still 1.96. Solving for the sample size, we get: sample size = (z * standard deviation / margin of error)^2 = (1.96 * 0.07 / 0.0197)^2 = 120.79. Therefore, we would need a sample size of at least 121 bottles to achieve the desired margin of error.
In conclusion, the point estimate of the population mean is 2.02 liters, and the 95% margin of error for this estimate is 0.0197 liters. To reduce this margin of error to 1/3 of its current size, a sample size of at least 121 bottles would be required.

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The zero's of the polynomial 4x² - 4x - 8 are as follows:

x = 2 or x = -1

Zeros of a polynomial can be defined as the points where the polynomial becomes zero as a whole. In other words, the zeros of a polynomial p(x) are all the x-values that make the polynomial equal to zero.

Therefore, let's find the zero's of the polynomial.

4x² - 4x - 8 = 0

divide through by 4

x² - x - 2 = 0

x² + x - 2x - 2 = 0

x(x + 1) -2(x + 1) = 0

(x - 2)(x + 1) = 0

Therefore,

x = 2 or x = -1

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The zeros of polynomial 4x² - 4x - 8, are 2 and -1. The relationship between the zeros and coefficients are 1 and -2.

Let the given polynomial be p(x) = 4x² - 4x - 8

To find zeros, take p(x) = 0

Factorizing the equation,

4x² - 4x - 8 = 0

4(x² - x - 4) = 0

x² - 2x + x- 2 = 0

x(x-2) + 1(x-2) = 0

(x-2) (x+1) = 0

∴ x=2 and x=-1

The roots of 4x² - 4x- 8 are 2 and -1

Relationship between the sum of zeros and coefficients:

-Coefficient of x/ coefficient of x²

(-1) + 2 = -(-4)/4 = 1

Relation between the product of zeros and coefficients:

Constant/ coefficient of x²

(-1) × 2 = -8/4 = -2

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Answer: 70%

Step-by-step explanation:

obviously 7/10 gives you 70%

Answer:

70%

Step-by-step explanation:

If 3 of the pins were knocked down, that means 7 pins were still standing.

Next, to find what percent 7 is of 10, divide 10 by 100 to get 0.1.

0.1 is 1% of 10, so we need to divide 7 by 0.1 to find the percentage, which is 70.

Answer: It means Undo

Step-by-step explanation:

Step-by-step explanation:

1. To round $5/11 = 0.\overline{45}$ to the nearest whole number, we look at the digit in the ones place, which is 5. Since 5 is greater than or equal to 5, we round up to the next whole number, which is 1. Therefore, rounded to the nearest whole number, $5/11$ is equal to 1.

2. To round $5/11 = 0.\overline{45}$ to the nearest tenth, we look at the digit in the hundredth place, which is 5. Since 5 is greater than or equal to 5, we round up to the next tenth, which is 0.5. Therefore, rounded to the nearest tenth, $5/11$ is equal to 0.5.

3. To round $5/11 = 0.\overline{45}$ to the nearest hundredth, we look at the digit in the thousandth place, which is also 5. Since 5 is greater than or equal to 5, we round up to the next hundredth, which is 0.46. Therefore, rounded to the nearest hundredth, $5/11$ is equal to 0.46.

4. To round $5/11 = 0.\overline{45}$ to the nearest thousandth, we look at the digit in the ten thousandth place, which is 4. Since 4 is less than 5, we round down to 0.455. Therefore, rounded to the nearest thousandth, $5/11$ is equal to 0.455.

5. To round $5/11 = 0.\overline{45}$ to the nearest ten thousandth, we look at the digit in the hundred thousandth place, which is 5. Since 5 is equal to 5, we round up if the digit in the ten thousandth place is odd, and round down if it is even. In this case, the digit in the ten thousandth place is 4, which is even, so we round down to 0.4550. Therefore, rounded to the nearest ten thousandth, $5/11$ is equal to 0.4550.

6. To round $5/11 = 0.\overline{45}$ to the nearest hundred thousandth, we look at the digit in the millionth place, which is also 5. Since 5 is equal to 5, we round up if the digit in the hundred thousandth place is odd, and round down if it is even. In this case, the digit in the hundred thousandth place is even, so we round down to 0.45499. Therefore, rounded to the nearest hundred thousandth, $5/11$ is equal to 0.45499.

When Tony rounds $0.\overline{45}$ to the nearest hundred thousandth, he gets 0.45499, which he then rounds to 0.4550, and so on, following the same steps we did above. His final answer for question 1 will be 0, since rounding 0.5 to the nearest whole number gives 0. Therefore, Tony's final answers will be:

1. 0

2. 0

3. 0.46

4. 0.455

5. 0.4550

6. 0.45499

According to the Census 2000, the overall American Indian and Alaska Native population had a younger median age compared to the national median age. The national median age in 2000 was 35.3 years, whereas the median age for the American Indian and Alaska Native population was 26.3 years.

This can be attributed to several factors, including higher fertility rates and lower life expectancies in some American Indian and Alaska Native communities. Additionally, many Native American tribes have a strong cultural emphasis on family and community, which can contribute to larger family sizes and a younger overall population. It is important to note that these demographic trends may have shifted in the years since the Census 2000, and that there is significant diversity within the American Indian and Alaska Native population in terms of age, geography, and culture.

it is clear that the American Indian and Alaska Native population had a younger median age in 2000 compared to the national median age.

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Answer:

Step-by-step explanation:

if 32 was originally there now some left and 21 are left we can pit it into a subtraction equation.

32-?=21

we can also make an addition equation

21+?=32

we know that ?= 11 because of commen scene.

Answer: 32-(__)=21

Step-by-step explanation:

I like to think of what I'm given to be the left side, and what's after to be the right side. If there are 32 originally, then you take some away (since 21 is fewer than 32), that's subtracting by some number. Then, we have 21 left so put 21 on the right side. To solve, subtract the 21 from the 32 and add the unknown over to get (__)=9

Answer:(-6,3)

Step-by-step explanation:

The dimensions of the deck are 26 meters by 16 meters and 84 meters of fencing will need to be purchased for the deck and pool area.

Let's denote the width of the deck as 'x'.

The length of the pool is 20 meters, and the width is 10 meters.

The combined area of the pool and the deck is 264 square meters.

The area of the pool is length times width: 20 × 10 = 200 square meters.

The area of the deck is (20 + 2x)(10 + 2x) - 200 square meters. We subtract 200 square meters to account for the area of the pool.

Therefore, the polynomial equation representing the given information is:

(20 + 2x)(10 + 2x) - 200 = 264

(200 + 40x + 20x + 4x^2) - 200 = 264

4x²+ 60x = 264

4x² + 60x - 264 = 0

Factoring out a common factor of 4:

4(x² + 15x - 66) = 0

Factoring the quadratic equation:

(x + 18)(x - 3) = 0

The width of the deck is x = 3 meters.

The dimensions of the deck can be found by adding twice the width to the length and width of the pool:

Length of the deck = 20 + 2x = 20 + 2(3) = 26 meters

Width of the deck = 10 + 2x = 10 + 2(3) = 16 meters

Therefore, the dimensions of the deck are 26 meters by 16 meters.

To calculate the length of fencing required, we need to consider the perimeter of the deck.

Perimeter of the deck = 2×(Length of the deck + Width of the deck)

Perimeter of the deck = 2 × (26 + 16)

Perimeter of the deck = 2 × 42

Perimeter of the deck = 84 meters

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There are 792 different ways the teams can be formed from a group of 12 people when selecting 5 people for each team.

To determine the number of different ways the teams can be formed, we can use the concept of combinations. In this case, we need to select 5 people out of a total of 12.

The number of ways to choose a team of 5 out of 12 people can be calculated using the formula for combinations, which is denoted as "nCr" or "C(n, r)".

The formula for combinations is:

nCr = n! / (r!(n - r)!)

Where:

n is the total number of people (12 in this case)

r is the number of people to be selected for the team (5 in this case)

! denotes the factorial function

Now let's calculate the number of different ways the teams can be formed:

12C5 = 12! / (5!(12 - 5)!)

= 12! / (5! * 7!)

= (12 * 11 * 10 * 9 * 8) / (5 * 4 * 3 * 2 * 1)

= 792

Therefore, there are 792 different ways the teams can be formed from a group of 12 people when selecting 5 people for each team.

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The pollster should survey approximately 2,401 U.S. voters to estimate the true proportion of voters who oppose capital punishment with 95% confidence and a margin of error of 2%.

In order to estimate the true proportion of U.S. voters who oppose capital punishment with a 95% confidence level and a margin of error of 2%, the pollster should survey approximately 2,401 voters.



To calculate the sample size needed for this estimation, we can use the formula:

n = (Z² * p * q) / E²

where n is the sample size, Z is the z-score corresponding to the confidence level (in this case, 1.96 for 95% confidence), p is the estimated proportion of voters who oppose capital punishment, q is the estimated proportion of voters who support capital punishment (which is 1-p), and E is the desired margin of error (in this case, 0.02).

Assuming a conservative estimate of p = q = 0.5, we can plug in the values and solve for n:

n = (1.96² * 0.5 * 0.5) / 0.02² ≈ 2,401

Therefore, the pollster should survey approximately 2,401 U.S. voters to estimate the true proportion of voters who oppose capital punishment with 95% confidence and a margin of error of 2%.



In conclusion, to estimate the true proportion of U.S. voters who oppose capital punishment with a 95% confidence level and a margin of error of 2%, the pollster should survey approximately 2,401 voters. This sample size calculation is based on the formula for calculating sample size using the z-score, estimated proportions, and desired margin of error

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There are 720 different completed answer sheets possible, where no blanks are allowed.

In this problem, we have 6 questions and 6 different answers to match with each question. We need to determine how many different completed answer sheets are possible, where no blanks are allowed. To solve this, we'll use combinatorics and permutations.

To find the number of different completed answer sheets, we can consider each question as a distinct entity. Let's label the questions as Q1, Q2, Q3, Q4, Q5, and Q6. Similarly, let's label the answers as A1, A2, A3, A4, A5, and A6.

Since each question needs to be matched with a different answer, we can think of this as a one-to-one mapping between the questions and answers. In other words, we want to find the number of permutations of the answers that satisfy the matching condition.

The first question (Q1) can be matched with any of the 6 answers (A1, A2, A3, A4, A5, or A6). Once Q1 is matched, the second question (Q2) can be matched with any of the remaining 5 answers. Similarly, the third question (Q3) can be matched with any of the remaining 4 answers, and so on.

Using the fundamental principle of counting, we can multiply the number of choices available for each question.

The number of possible completed answer sheets is given by:

Number of completed answer sheets = 6 * 5 * 4 * 3 * 2 * 1 = 720.

So, there are 720 different completed answer sheets possible, where no blanks are allowed.

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Answer:

he correct answer is c. vD = -7 vs = 5.

The Doppler shift equation is:

f = f' (v - vD) / (v - vS)

Where:

f is the frequency detected

f' is the frequency emitted

v is the speed of sound

vD is the velocity of the detector

vs is the velocity of the source

In this case, the source is traveling at 5 m/s away from the detector, the detector is traveling at 7 m/s toward the source, and there is a 3 m/s wind blowing from the source toward the detector.

The velocity of the detector is negative because it is moving towards the source. The velocity of the source is positive because it is moving away from the detector.

Therefore, the values that should be substituted into the Doppler shift equation are:

vD = -7

vs = 5

Step-by-step explanation:

The Panthers have the largest overall size hat for their players based on the mean calculation. The mean is the best measure of center to compare the two teams because it takes into account all the data and provides a representative value of the central tendency.

To determine which team has the largest overall size hat for their players, we need to find the team with the highest average hat size. The best measure of center to compare the two teams would be the mean, as it provides a representative value of the central tendency of the data.
To calculate the mean for each team, we need to add up all the hat sizes and divide by the number of players on the team. For the Cougars, the sum of the hat sizes is 308.5 and there are 14 players, so the mean hat size is 22.04 inches. For the Panthers, the sum of the hat sizes is 333 and there are also 14 players, so the mean hat size is 23.79 inches.
Based on these calculations, we can see that the Panthers have the largest overall size hat for their players, with an average hat size of 23.79 inches compared to the Cougars' average hat size of 22.04 inches.
In conclusion, the Panthers have the largest overall size hat for their players based on the mean calculation. The mean is the best measure of center to compare the two teams because it takes into account all the data and provides a representative value of the central tendency.

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There are 6,227,020,800 ways in which Aaron can arrange the 13 songs on the playlist.

To determine the number of ways Aaron can arrange the 13 songs on the playlist, we can use the concept of permutations. Since the order of the songs matters (i.e., each arrangement is different), we can use the formula for permutations.

The number of ways to arrange n items in a specific order is given by n factorial, denoted as n!. The factorial of a number n is the product of all positive integers less than or equal to n.

In this case, Aaron has 13 songs to arrange on the playlist, so the number of arrangements can be calculated as:

13! = 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

Calculating this expression, we find:

13! = 6,227,020,800

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The probability that a student who passed the test did not complete the homework is 4/15.

We can use conditional probability to solve this problem. Let A be the event that a student passed the test, and let B be the event that a student completed the assignment. Then we want to find the probability of A given not B, denoted as P(A | not B).

From the given information, we know that:

- P(A) = 18/27 = 2/3 (since 18 out of 27 students passed the test)

- P(B) = 17/27 (since 17 out of 27 students completed the assignment)

- P(A and B) = 15/27 (since 15 out of 27 students passed the test and completed the assignment)

To find P(A | not B), we first need to calculate P(not B), the probability that a student did not complete the assignment. This can be found using the complement rule:

P(not B) = 1 - P(B) = 1 - 17/27 = 10/27

Now we can use Bayes' theorem to find P(A | not B):

P(A | not B) = P(not B | A) * P(A) / P(not B)

We can find P(not B | A) using the formula:

P(not B | A) = P(A and not B) / P(A)

We know that P(A and B) = 15/27, so P(A and not B) = P(A) - P(A and B) = 2/3 - 15/27 = 4/27. Substituting into the formula:

P(not B | A) = (4/27) / (2/3) = 2/9

Substituting this value, along with the values we previously calculated, into Bayes' theorem:

P(A | not B) = (2/9) * (2/3) / (10/27) = 4/15

Therefore, the probability that a student who passed the test did not complete the homework is 4/15.

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The area of the part of the plane 2x + 5y + z = 10 that lies in the first octant is 8√6/5 square units.

The first octant is the region of space where x, y and z are all positive. We need to find the area of the surface of the part of the plane 2x + 5y + z = 10 that lies in the first octant.

To find the surface area, we need to first parameterize the surface. We can do this by fixing one variable and expressing the other two in terms of it. Let's fix x:

2x + 5y + z = 10

Solving for z, we get:

z = 10 - 2x - 5y

Now, we can express y in terms of a parameter t:

y = t

And we can express z in terms of x and t:

z = 10 - 2x - 5t

So the parameterization of the surface is:

r(x, t) = (x, t, 10 - 2x - 5t)

To find the surface area, we need to compute the magnitude of the cross product of the partial derivatives of r with respect to x and t:

|∂r/∂x x ∂r/∂t| = |<1, 0, -2>| x |<0, 1, -5>| = |<2, 1, 1>|

= √(2^2 + 1^2 + 1^2) = √6

So the surface area is:

∫∫ √6 dA

where the double integral is over the region in the first octant where 2x + 5y + z = 10. We can express this region as:

0 ≤ x ≤ 5

0 ≤ y ≤ (10 - 2x)/5

0 ≤ z ≤ 10 - 2x - 5y

So the integral becomes:

∫₀^₅ ∫₀^(10-2x)/5 √6 dz dy dx

Evaluating this integral, we get:

∫₀^₅ ∫₀^(10-2x)/5 √6 dz dy dx = √6 ∫₀^₅ ∫₀^(10-2x)/5 dz dy dx

= √6 ∫₀^₅ (10-2x)/5 dy dx

= √6 ∫₀^₅ 2 - (2/5)x dx

= √6 [2x - (1/5)x²] from 0 to 5

= √6 [10 - (1/5)(25)]

= √6 (8/5)

= 8√6/5

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Step-by-step explanation:

The triangles are similar. Writing a proportion:

(3x − 5 + 10) / 28 = (3x − 5) / 20

Cross multiply:

20 (3x − 5 + 10) = 28 (3x − 5)

Simplify and solve:

20 (3x + 5) = 28 (3x − 5)

5 (3x + 5) = 7 (3x − 5)

15x + 25 = 21x − 35

60 = 6x

x = 10

The Difference in the amounts that Tsion and Ibrahim paid for their watches is £3.85.

To find the difference in the amounts that Tsion and Ibrahim paid for their watches, we need to convert the prices to the same currency. We can use the exchange rates given to convert both prices to pounds.

1 Singapore dollar = £0.58

72 Singapore dollars = 72 x £0.58 = £41.76

1 Hong Kong dollar = £0.09

399 Hong Kong dollars = 399 x £0.095 = £37.91

Therefore, Tsion paid £41.76 for the watch and Ibrahim paid £37.91 for the same model of watch.

To find the difference in the amounts paid, we can subtract the smaller amount from the larger amount:

£41.76 - £37.91 = £3.85

Therefore, the difference in the amounts that Tsion and Ibrahim paid for their watches is £3.85.

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The slope of CD = 0.6.

The slope of DE = -1/3.

The slope of EC = 0.5.

The length of CD = √136 units.

The length of DE = √40 units.

The length of EC = √80 units.

Triangle CDE is a scalene triangle.

In Mathematics and Geometry, the slope of any straight line can be determined by using the following mathematical equation;

Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope (m) = rise/run

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) CD = (5 + 1)/(4 + 6)

Slope (m) CD = 6/10

Slope (m) CD = 0.6.

Slope (m) DE = (3 - 5)/(2 + 4)

Slope (m) DE = -2/6

Slope (m) DE = -1/3.

Slope (m) EC = (3 + 1)/(2 + 6)

Slope (m) EC = 4/8

Slope (m) EC = 0.5.

Next, we would determine the length of each sides of triangle CDE as follows;

Distance CD = √[(x₂ - x₁)² + (y₂ - y₁)²]

Distance CD = √[(4 + 6)² + (5 + 1)²]

Distance CD = √136 units.

Distance DE = √[(2 + 4)² + (3 - 5)²]

Distance DE = √40 units.

Distance EC = √[(2 + 6)² + (3 + 1)²]

Distance EC = √80 units.

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Answer:

18m

Step-by-step explanation:

Perimeter = 2L + 2W

Perimeter = 2(5) + 2(4)

= 10 + 8

= 18 m

Answer:

18 meters

Step-by-step explanation:

5+5=10

4+4=8

10+8=18

Answer:

Step-by-step explanation: