What are the solutions of this quadratic equation

Answer:

Step-by-step explanation:

take 71.28-21.39

Answer:

If the drum set is 30% off, this means that Susan only needs to pay 70% of the original price. We can calculate this using the following formula:

Total price = Original price x (1 - Discount rate)

where the discount rate is the percentage discount expressed as a decimal. In this case, the discount rate is 30% or 0.3. Substituting in the given values, we get:

Total price = $71.28 x (1 - 0.3)

Total price = $71.28 x 0.7

Simplifying, we get:

Total price = $49.896

However, we also know that Susan got a discount of $21.39. This means that she only needs to pay:

Total price - Discount = $49.896 - $21.39

Total price - Discount = $28.506

Therefore, Susan has to pay $28.506 in total.

Answer: 3.5

Step-by-step explanation: sry if im wrong ):

Answer:313:)

Step-by-step explanation:

Answer: 2:3

Step-by-step explanation:

Melanie's answer that 212 napkins were used in all and 433 napkins were left is reasonable and can be verified by using simple algebraic equations.

Yes, Melanie's answer is reasonable. She correctly determined that the total number of napkins used in lunch and dinner was 325-113 = 212. From this, we can also confirm that the total number of napkins left was 645 - 212 = 433. We can verify these answers by using simple algebraic equations to solve the problem. Using the equation 645 = 325 + x, where x is the number of napkins used at dinner, we can solve for x by subtracting 325 from both sides to get x = 320. Similarly, using the equation 645 = 433 + y, where y is the number of napkins used in all, we can solve for y by subtracting 433 from both sides to get y = 212. This confirms Melanie's answer that 212 napkins were used in all and 433 napkins were left.

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The cost to operate Lee's Tv is 2.88 dollars.

Lee watches TV for 4 hours per day. During that time, the TV consumes 200 watts per hour. Electricity costs (12 cents)/(1 kilowatt-hour).

Therefore, the cost for Lee to operate in 30 days can be calculated as follows:

200 watt = 0.2 kilowatt

Therefore,

1 day = 4 hours

30 days = ?

cross multiply

number of hours = 120 hours.

Therefore, in 30 days he watches television for 120 hours.

Let's find the cost

0.12 dollars  = 12 cent

1 hour  = 0.2 kilowatt

120 hours =

kilowatt use in 30 days = 0.2 × 120 = 24 kilowatts

Therefore,

1 kilowatts = 0.12 dollars

24 kilowatts = ?

cost of Tv for a month of 30 days = 24 × 0.12

cost of Tv for a month of 30 days = 2.88 dollars

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The measure or value of x = 55°. This is solved using the Tangent, Secant and Arc theorems.

Note that the Measure of and x (m∠x) = (Far Arc - Near Arc)/2

Where

Far Arc = 360 - 65 - 120 = 175°

Near Arc = 65°

thus, m∠x = (175-65)/2

m∠x  = 55°

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Step-by-step explanation:

Quadrilateral Sum Theorem. The total sum of the interior angles of a quadrilateral is 360°. A quadrilateral is formed by joining four non-collinear points. A quadrilateral has four sides, four vertices and four angles. Therefore, that is the Quadrilateral Sum Theorem.

Answer: $11.60

Step-by-step explanation: Since ur finding the cost of one cd and she bought 6 and since is before tax you do 36.90/(divided by) 6 and boom #!

Answer:

D. An Energy source, a recipient, and a connection

Answer:

D. All of the above

Step-by-step explanation:

Your bank can incur additional revenue by charging you for all of those things

By answering the question using the information provided, we can conclude that in order to arrive at the general solution, we must take into account the scenario in which [tex]y-1\neq 0 , y \neq 1[/tex], by constructing equations.

Two equations are said to be equivalent when their bases and solutions line up. To create an equivalent equation, the same quantity, symbol, or expression must be added to or removed from both of the equation's two sides.

We can also create an analogous equation by multiplying or dividing both sides of an equation by a nonzero integer.

Solving differntial calculus

[tex](1+x)y'=( x+2) (y-1)[/tex]

We will first employ varying separation. The variables y and x will be placed on the opposite sides of the equation, and both sides will be integrated.

[tex](1+x)y'/(y-1) = (x+2)dx[/tex]

We will integrate both sides using the substitution[tex]u= y-1,\frac{du}{dy} =y'[/tex]

∫[tex](x+2)dx[/tex] =∫[tex](1+x)\frac{du}{u}[/tex]

㏑l[tex]u[/tex]l +[tex]x[/tex]㏑l[tex]u[/tex]l= [tex]\frac{1}{2} x^{2}+2x+c[/tex]

Substituting [tex]u= y-1[/tex]

㏑l[tex]y-1[/tex]l+ [tex]x[/tex]㏑l[tex]y-1[/tex]l= [tex]\frac{1}{2x^{2} } +2x+c[/tex]

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The complete question is: Find the general solution to the differential equation (1+x)y' = (x + 2)(y − 1).

Answer:

Her contribution to charity reduces her taxable income by $600, Thus, her tax liability will be reduced by 28% of $ 600, and she comes under 28%

Step-by-step explanation:

Required number of bags which have zips on them are 71.

Here given, A company makes 140 bags.

So, total number of bags = 140

It is also given, 47 of the bags have buttons but no zips 48 of the bags have zips but no buttons.

So, number bags which have buttons but no zips = 47 and number bags which have zips but no buttons = 48

and numbers of bags which have neither zips nor buttons = 22.

If we subtract number of bags which have no zips from total number of bags then we will get total number of bags which have zips

So, number of bags have zips on them

[tex] = 140 - 47 - 22 = 71[/tex]

Therefore, 71 bags have zips on them.

This is a problem of Subtraction.

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Therefore, the quadratic function in standard form that represents the data in the table is: y = 1/2 x² - 5/2 x + 5.

A function is a mathematical concept that describes the relationship between two sets of numbers. It is a rule that assigns to each input (or element in the domain) exactly one output (or element in the range). In simpler terms, a function is like a machine that takes in a number and produces another number as output, according to some specific rules. The input is usually denoted by x, and the output by f(x), which is read as "f of x". Functions can take many forms, such as linear, quadratic, trigonometric, exponential, logarithmic, and more. They are widely used in mathematics, science, engineering, and many other fields to model and analyze various phenomena.

Here,

To write a quadratic function in standard form, we need to use the general form of the quadratic equation:

y = ax²+ bx + c

where a, b, and c are constants. We can use the values in the table to find these constants.

When x = 2, y = 3

When x = 4, y = 1

When x = 6, y = 3

When x = 8, y = 9

When x = 10, y = 19

Substituting these values into the quadratic equation, we get:

3 = 4a + 2b + c

1 = 16a + 4b + c

3 = 36a + 6b + c

9 = 64a + 8b + c

19 = 100a + 10b + c

We can now use these equations to solve for a, b, and c. One way to do this is to use a matrix equation:

|16 4 1| |a| |1|

|36 6 1| |b| = |3|

|64 8 1| |c| |9|

Using a calculator or matrix software, we can solve for a, b, and c:

a = 1/2

b = -5/2

c = 5

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The standard form as: 298

What is standard form?

Standard form is a way of writing numbers a little differently for instance

The number "2 hundreds 9 tens and 18 ones" can be written in standard form as:

298

In standard form, we write the digits in the place value of their corresponding powers of 10. In this case, the digit 2 is in the hundreds place (10)², the digit 9 is in the tens place (10), and the digit 8 is in the ones place (10^0).

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Answer:

21

Step-by-step explanation:

9x + 10 = 20

9x = 10

x = 10/9

What is the value of 18x + 1?

18(10/9) + 1

= 20 + 1

= 21

So, the value of 18x + 1 is 21

Hello and regards kiann09.

So the solution of the equation is:

  y = x - 2

  y = 3x + 5

We substitute the given value of y into the equation y = 3x + 5.

   x - 2 = 3x + 5

We solve the equation for x.

     x - 2 - 3x = 5

We move the variable to the left side and change its sign.

The sign of the variable must be changed because, in the process of "moving the variable", we are adding its opposite to both sides.

     x - 2 - 3x = 5

Now we move the constant to the right hand side and change its sign.

      x - 3x = 5 + 2

We group like terms.

      -2x = 5 + 2 ⇒ We add the numbers ⇒ -2x + 7

We must divide both sides by -2.

      x = - 7/2

We substitute the given value of x into the equation y = x - 2.

       y = (-7/2)-2

We solve the equation for y. We write all the numerators above the common denominator.

              y = -(7 + 4)/2

              y = - 11/2

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Answer: .2, .14, .125

Step-by-step explanation:f(x)=1/x or 1/n

a) The height that represents the 95th percentile is approximately 68.1 inches.

b) the height that represents the first quartile is approximately 65.5 inches.

(a) To find the height that represents the 95th percentile, we need to find the z-score that corresponds to this percentile and then use that to find the corresponding height.

The z-score for the 95th percentile can be found using a standard normal distribution table or calculator. The area to the left of the z-score is 0.95, so the area to the right is 0.05. From the standard normal distribution table, the z-score corresponding to an area of 0.05 is approximately 1.645.

Now we can use the formula for z-scores to find the corresponding height:

z = (x - mu) / sigma

where x is the height we want to find, mu is the mean height (63.7 inches), sigma is the standard deviation (2.75 inches), and z is the z-score we just calculated (1.645).

Rearranging the formula, we get:

x = mu + z * sigma

Plugging in the values, we get:

x = 63.7 + 1.645 * 2.75 ≈ 68.1

Therefore, the height that represents the 95th percentile is approximately 68.1 inches.

(b) To find the height that represents the first quartile, we need to find the z-score that corresponds to the 25th percentile and then use that to find the corresponding height.

The z-score for the 25th percentile can be found using a standard normal distribution table or calculator. The area to the left of the z-score is 0.25, so the area to the right is 0.75. From the standard normal distribution table, the z-score corresponding to an area of 0.75 is approximately 0.67.

Using the formula for z-scores and the same values for mu and sigma, we get:

x = mu + z * sigma = 63.7 + 0.67 * 2.75 ≈ 65.5

Therefore, the height that represents the first quartile is approximately 65.5 inches.

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Answer:

y = -4x + 5

Step-by-step explanation:

y = mx + b

From the graph, we see the line intersects the y-axis at 5, so the y-intercept, b, is 5.

y = mx + 5

slope = m = rise/run

rise = up and down

run = left and right

We go up 4 units from the lower point to the upper point. That is a rise of 4 units. Then we go left 1 unit. That is a run of -1.

slope = m = 4/(-1) = -4

y = mx + 5

y = -4x + 5

As a result, Rhonda was paid $18 per hour before to being promoted; nevertheless, she will now be paid $20.70 per hour.

Finding a single unit value and applying it to ratio and proportional problem solving is known as the unitary method in mathematics. It is frequently employed in order to resolve issues involving either direct proportion, inverse proportion, or both. In the unitary technique, the ratio of the quantities' corresponding unit values is used to indicate the relationship between the quantities. The desired value is then achieved by multiplying or dividing the unit value, as necessary.

given

Let x be the hourly wage Rhonda received prior to her promotion.

The issue states that her new hourly wage is equal to 115% of her previous wage:

20.70 = 1.15x

We can divide both sides by 1.15 to find x:

x = 20.70 / 1.15

x = 18

As a result, Rhonda was paid $18 per hour before to being promoted; nevertheless, she will now be paid $20.70 per hour.

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Using the supplementary angle theorem, the value for x so that points A, B, and C are collinear is 8.

What is a supplementary angle?

The definition of "supplementary" in mathematics relates to angles that combine to form a straight angle. It indicates that when two angles sum up to 180 degrees, they are said to be supplementary angles.

A line segment AC is drawn.

Point B is in between A and C.

A transversal DE is drawn passing through point B.

Points D, B, and E are collinear.

The measure of angle CBE is 148° and the measure of angle EBA is 4x°.

The angles ∠CBE and ∠EBA forms a pair of supplementary angles.

Their sum result in value of 180°.

Mathematically, this can be represented as -

∠CBE + ∠EBA = 180°

Substituting the values into the equation -

148° + 4x° = 180°

Solving for x, we get -

4x° = 180° - 148°

4x° = 32°

x = 32 / 4

x = 8

Therefore, the value for x is obtained as 8.

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Using the definitions for the types of triangles in the image, we can see that the interior angles are:

x = 37°

y = 14°

First, on the right side we can see an equilateral triangle, then all its interior angles are of 60°.

Amd the triangle in the left side is isoceles, then the angle in the right side has the same measure than x, and now with that we can write the equation:

x + 83° + 60° = 180°

Solving for x, we will get:

x = 180° - 83° - 60°

x = 37°

Now let's find the value of y, we cansee that the triangle in the middle is also isoceles, and remember that for any triangle the sum of the interior angles must be 180°, so here we can write:

83° + 83° + y = 180°

y = 180° - 2*83°

y = 14°

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Answer: una linea

Step-by-step explanation:

For given coordinates,  the ordered pair describing the location of G'' is (3,-6).

What are coordinates?

Coordinates are a set of numbers that specify the position or location of a point or object in space, relative to a reference point or system. In two-dimensional space, coordinates are usually represented by a pair of numbers (x, y), where the first number represents the horizontal position of the point along the x-axis, and the second number represents the vertical position of the point along the y-axis. In three-dimensional space, coordinates are usually represented by a triple of numbers (x, y, z), where the first number represents the horizontal position of the point along the x-axis, the second number represents the vertical position of the point along the y-axis, and the third number represents the position of the point along the z-axis, which is perpendicular to the x-y plane.

Now,

When a point is reflected over the x-axis, the y-coordinate is negated. So the image of G(-3,6) over the x-axis is G'(-3,-6).

When a point is reflected over the y-axis, the x-coordinate is negated. So the image of G'(-3,-6) over the y-axis is G''(3,-6).

Therefore, the ordered pair describing the location of G'' is (3,-6).

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The depth of this cabinet is equal to 0.5 m³.

Volume is a three-dimensional measure that indicates the space occupied by an object. It is a physical quantity that expresses the amount of space an object occupies in three dimensions - length, width and height.

Note that this cabinet has the shape of a parallelepiped, and its volume is found by multiplying its dimensions. Calculating the depth measurement, we have:

1,08 m³ = 1,2 m * 1,8 m * p

p = 1,08 m³/(1,2 m * 1,8 m)

p = 1,08 m³ / 2,16 m³

p = 0,5 m

Thus, the list BTW, BWT, TBW, TWB, WBT, and WTB is the correct response.

The number of possible arrangements or orders for a set of items is known as the arrangement number, sometimes known as the permutation number or simply as the permutation.

The following is the accurate list of all conceivable pup arrangements:

BTW, BWT, TBW, TWB, WBT, WTB

This is due to the fact that the puppies' order is important, thus we may utilize permutations to discover every potential configuration. There are 3 pups to place in a row, which results in a total of 3! = 6 combinations. We can categories them as follows:

1. BTW

2. BWT

3. TBW

4. TWB

5. WBT

6. WTB

Thus, the list BTW, BWT, TBW, TWB, WBT, and WTB is the correct response.

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