need help quickly its due in 30

Solving the equation using quadratic formula the value of y in the quadratic equation is y= 0.675 or y= -3.11

Mathematically, quadratic formula can be written as

[tex]y= \frac {-b + or - \sqrt{b^{2}-4ac } }{2a}[/tex]

from the expression, a= 3.9 , b=9.5, c= -8.2

substitute the value into the quadratic equation

[tex]y= \frac{-b^{} + or -\sqrt{b^{2}- 4ac } }{2a}[/tex]

y= [tex]\frac{-9.5^{} + or - \sqrt{9.5^{2}-4(3.9)(-8.2) } }{2(3.9)}[/tex]

y= [tex]\frac{-9.5^{} + or -\sqrt{90.25+127.92} }{7.8}[/tex]

y=  [tex]\frac{-9.5^{} + \sqrt{218.17} }{7.8}[/tex] or y= [tex]\frac{-9.5^{} - \sqrt{218.17} }{7.8}[/tex]

y =   [tex]\frac{-9.5 + {14.77} }{7.8}[/tex] or y= [tex]\frac{-9.5 - {14.77} }{7.8}[/tex]

y =   [tex]\frac{5.27}{7.8\\}[/tex] or  y= [tex]\frac{-24.27}{7.8}[/tex]

y= 0.67 or y= -3.11

Therefore the value of y in the quadratic equation is y= 0.67 or y= -3.11

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Step-by-step explanation:

55.7% of fire station response times are between 4 and 6 minutes. This can be calculated using the z-score formula, which is (x-μ)/σ, where x is the value of interest (in this case, 4 and 6 minutes), μ is the mean (4.5 minutes), and σ is the standard deviation (1.2 minutes). The z-score for 4 minutes is -0.42 and the z-score for 6 minutes is 0.42. Using a standard

Kadita has 4 pigs and 26 chickens in on his farm.

Given, Kadita counted 30 pigs and chickens on the farm. Jack counted a total of 68 legs for the animals.

Let the number of pigs be, x

and the number of chickens be, y

x + y = 30

4x + 2y = 68

Now, we have to two equations,

x + y = 30

2x + y = 34

On subtracting both the equations, we get

x = 4

and y = 30 - 4

y = 26

So, Kadita has 4 pigs and 26 chickens in on his farm.

Hence, Kadita has 4 pigs and 26 chickens in on his farm.

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If two quantities have same units, they will be comprised of the same basic physical quantities and hence their dimensions will be same. Same dimensions do not represent the same physical quantity. For example, The kinetic energy and the potential energy are measured in the same units but they possess different physical quantities.

The minimal set of coordinates required to specify any point within a mathematical space is known as the dimension of the space in physics and mathematics. As a result, a line has a dimension of one because a point on it can be specified by a single coordinate, such as the point at 5 on a number line.

Two quantities with the same units will be made up of the same fundamental physical quantities, resulting in identical dimensions. The same physical quantity does not have the same dimensions. For instance, although having different physical properties, kinetic energy and potential energy are measured in the same units.

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Answer: y=−16.309691adqrsux+16.309691adqrsu+3

Let's solve for y.

y=((((((((−3(x−1))(2))(s))(q))(u))(a))(r))(2.718282))(d)+3

This is the best I could come up with

9 appears in all integers from 1 to 500, 95 times.

9 total from

1-9: 1 time

10-19: 1 time

20-29: 1 time

30-39: 1 time

40-49: 1 time

50-59: 1 time

60-69: 1 time

70-79: 1 time

80-89 : 1 time

among 90 and 99

Between 1991 and 1998, one will occur.

then in 1999, 2 9.

9 from 90 to 99 is 10, thus

9+10 = 19 is the total number of 9s from 1 to 99.

In 1 to 99, there are so 19 9s.

similarly

the following:

19 9's in 100 to 199

19 9's in 200 to 299

19 9's in 300 to 399

19 9's in 400 to 499

Total 9s will therefore be

19+19+19+19+19+19 = 95 times

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Answer:

y ≈ 16.12452

Step-by-step explanation:

Pythagorean theorem = a² + b² = c²

In this example, 14 = a, 8 = b, and y = c

14² = 196, 8² = 64

196 + 64 = 260 = y²

y² = [tex]\sqrt{260}[/tex] ≈ 16.12452

The term in cell I5 will be for the AVERAGEIFS function:

AVERAGEIF( I11:I67 ,"<3500",J11:J67 ,"E3")

For the given question the termed   AVERAGEIFS  is the function formula in excel which returns the average of all the cells available in the sheet in a range that meets a given condition.the syntax for the term is  AVERAGEIF(range, criteria, [average_range]),  where the range is  Required like  One or more cells to get the average. Criteria os the basically the form of an expression, number, or cell reference, and at last the average range is optional it is just the set of cells to average.

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Using unit I, calculate the average waiting time of customers in the wash line (μ for unit I = 12 per unit).

For unit II at 15 per hour

if waiting time is the only criterion, unit II should be purchased. But before we make the final decision, we must look at the profit differential between both units.

With unit I, some customers would balk and renege because of the 5 minute wait. And, although this greatly complicates the mathematical analysis, we can gain some estimate of lost sales with unit I by increasing Wq = 5 minutes and solving for λ. This would be the effective arrival rate of customers.

Therefore, because the original estimate of λ was 10 per hour, an estimated 2 customers per hour will be lost.

Lost profit of 2 costumers per hour × 14 hours × 1/2 ($0.70 fill-up profit + $0.40 wash profit) = $15.40 per day.

Because the additional cost pf unit II over unit I is only $4 per day, the loss of $15.40 profit obviously warrants installing unit II.

The original five-minute maximum wait constraint is satisfied by unit II.

Therefore, unit III is not considered unless the arrival rate is expected to increase.

Given question is incomplete.

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The mean of the decrease in rounded percentage of home is 7.14 which would used as misleading the about  data as raw data very far away from 7.14.

As given in the question,

Given rounded percentage decrease in home price is:

3, 3, 5, 6, 7, 7, 19

Mean of the rounded percentage

= ( Sum of all the values)/ (Number of values)

= ( 3 + 3 + 5 + 6 + 7 + 7 + 19) / 7

= 50 /7

=7.1428

= 7.14

7.14 is very far away from 3 and 19.

Mean is not representing  the correct information of the home price.

Using mean is misleading the correct information about percentage decrease.

Therefore, value of the mean is equal to 7.14 which mislead the decrease percentage.

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Answer: 19.75oz < x > 20.25oz

Step-by-step explanation: let x represent the weight of the bag of chips.

This equation states that the. weight must not exceed 20.25 but it must not be below 19.75oz.

Answer: 19.75oz < x > 20.25oz

Step-by-step explanation:

By using the vertical line test we will see that the relation that is a function is the one in the top left graph.

Here we ave the graphs of some relations, and we want to see which one of these represents a function.

To check that, we need to do the vertical line test.

The test says that if we draw a vertical line on the coordinate axis, and that line intercepts the graph of the relation more than one time, then the relation is not a function.

With that test we can see that the only relation that is a function is the one in the top left graph, is the only one that passes the vertical line test.

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The solution of the system of equations is given as follows:

The variables of the system of equations are given as follows:

Each shipping box must contain 40 items, hence:

x + y = 40.

The box weighs 400 ounces, hence, considering the weight of each item, we have that:

8x + 12y = 400.

From the first equation, we have that:

x = 40 - y.

Then the number of shower gels is obtained as follows:

8(40 - y) + 12y = 400

4y = 80

y = 80/4

y = 20.

The number of body sprays is of:

x = 40 - 20 = 20.

The problem is incomplete, hence we build and solve the equations, which will help you obtain the other information.

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Answer:

y=-1/2x-5

Step-by-step explanation:

Answer: x = 10

Step-by-step explanation:

x + 6 + 3x = 5x - 4

First you want to group your like values together

6 +4 = 5x - 3x - x

Note that when any value crosses the = sign, The sign in front of it (+/-) changes. (e.g. -4 changes to +4 after it crosses the = sign)

Then work out your values

10 = x

Also note that x is the same as 1x. So you minus 3x from 5x to get 2x and 2x minus 1x is equal to 1x which is the same as x.

The expression x^2 + 22x + c becomes a perfect square trinomial if the value of c is 121, so the correct option is A.

A perfect square trinomial is written as:

(a + b)^2 = a^2 + 2ab + b^2

Here we have the expression:

x^2 + 22x + c

We can rewrite the second term in such a way that we get:

x^2 + 2*11*x + c

comparing this with the form of the general perfect square trinomial we can see that:

a = x

b = 11

Then the value of c must be 11^2 = 121

Then we have:

x^2 + 2*11*x + 121 = (x + 11)^2

The correct option is A.

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Equation is C=25n + 2500 And The total cost to produce 3000 toys is $77,500 And With $32500, a total of 1200 toys can be produced

A linear equation is what, exactly?

An algebraic equation with only a constant and a first-order (linear) term, such as y=mx+b, where m is the slope and b is the y-intercept, is known as a linear equation.

A) Lets have linear equation y=mx+b,

C (total cost) = y and n (number of toys) =x.

The original development cost plus the production cost of each toy would equal the overall cost of creating n toys.

Because m is multiplied by n, the number of toys, the cost to produce a toy will equal m.

Due to the fact that b is a constant and its value is unaffected by the quantity of toys, it will always equal the development cost.

Therefore, C=25n + 2500

B) by above, equation put n=1750

C= 25(3000) + 2500

C= $77,500

C) Now, again by same equation, but C instead of n.

=> 32500= 25n +2500

=> 30000=25n

=> n = 1200

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In the following passage we have proven the Pythagoras' theorem.

What is Pythagoras' theorem?

The hypotenuse's square is equal to the sum of the squares of the other two sides if a triangle has a straight angle (90 degrees), according to the Pythagoras theorem. Keep in mind that BC2 = AB2 + AC2 in the triangle ABC signifies this. Base AB, height AC, and hypotenuse BC are all used in this equation. The longest side of a right-angled triangle is its hypotenuse, it should be emphasized.

Here given in the question that one side of the wall 5 feet

So as it is a rectangular bedroom it can be split into 2 right-angled triangles.

So the hypotenuse of the triangle is 13 feet

Now using the Pythagoras theorem we can find out the length of the other wall

b²=h²-p²

AB² + BC² = AD × AC + CD × AC

AB² + BC² = AC (AD + CD)

Since, AD + CD = AC

Therefore, AC² = AB² + BC²

So we have p² + b² = h².

Hence, we prove the Pythagoras theorem using two triangle.

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Answer:

$12.50

Step-by-step explanation:

Look at the graph down below \/

U can also mark where the pounds is so right at 25 pounds it would be about $12~

The percent decrease in the number of cable TV subscribers from 2006 to 2013 is 17.92%.

In the given question, in 2006, 68.1 million people subscribed to cable television. in 2013, that number had decreased to 57.1 million.

We have to find the percent decrease in the number of cable TV subscribers from 2006 to 2013.

The number of subscriber in 2006 is 68.1 million.

The number of subscriber in 2013 is 57.1 million.

Then the percent decrease in the number of cable tv subscribers from 2006 to 2013 is

Percent decrease in the number of cable TV subscribers = (subscriber in 2006 - subscriber in 2006)/subscriber in 2006 *100

Percent decrease in the number of cable TV subscribers = (61.4-50.4)/61.4 *100

Percent decrease in the number of cable TV subscribers = 11/61.4 *100

Percent decrease in the number of cable TV subscribers = 0.1792*100

Percent decrease in the number of cable TV subscribers = 17.92%

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Answer:

Step-by-step explanation:

What are you supposed to do?

0.00305 moles of sodium hypochlorite are present in a 4.00 ml sample.

A mole is the mass of a substance made up of the same number of fundamental components. Atoms in a 12-gram example are identical to 12C. Depending on the substance, the fundamental units may be molecules, atoms, or formula units.

A mole fraction shows how many chemical elements are present. The value of 6.023 x 1023 is equal to one mole of any substance (Avagadro number). It can be used to quantify the chemical reaction's byproducts. The symbol for the unit is mol.

The number of moles formula is denoted by the following expression.

The mass of material / Mass of one mole equals the number of moles.

moles of NaClO = mass of sample×density of bleach solution×mass of                bleach solution×1 mol/ mass of NaClO

= 4.00×1.08×0.0525/74.4 g of NaClO

= 0.00305.

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The pValue is 0.15625 > 0.05 when  brand1 killed all ants in 65 of 100 containers within two hours, and brand 2 killed all ants in 58 of 100 containers within two hours in hypothesis.

Let A represent the new pesticide and B be the Ant Killer. Then, you are given that

Brand1 kills ants in 65 of 100 containers:

Xa = 65/100 = 0.65

Brand2 kills ants in 58 of 100 containers:

Xb = 58/100 = 0.58

You know need to find sample variance for both,

s²A =∑(Xi - Xa)

= 65(1-0.65)² + 35(0 - 0.65)²

= 22.7

s²B =∑(Xi - Xb)²

= 59(1-0.59)² + 41(0 - 0.59)²

= 24.19

You can know do a test for significance

t = (Xa - Xb) / √(sA /nA) +(sB/nB)

and derive the conclusion from there

Here, Null and alternative hypothesis are generally,

Alternative hypothesis

Here, there are three samples are assumed. They are:

i) Samples are taken independently

ii) Samples must be selected randomly

iii) n₁p₁ ≥ 5 , n₁q₁ ≥ 5, n₂p₂ ≥ 5, n₂q₂ ≥ 5

i.e., p₁ = 0.65 ; p₂ = 0.58 , n₁= 100

q₁ = 0.35 ; q₂ = 0.42 , n₂=100

Corresponding p-value at Z = 1.01722

p-value = 0.15625 > 0.05

Hence, the pValue is 0.15625 > 0.05 when  brand1 killed all ants in 65 of 100 containers within two hours, and brand 2 killed all ants in 58 of 100 containers within two hours in hypothesis.

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Answer:

-1/2

Step-by-step explanation:

y2-y1/x2-x1

-10-(-3)/9-(-5)=-7/14=-1/2

The correct answer is b that is the probability that the mean of their test scores is greater than 78 is 0.0008.

The field of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number that lies between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty. The probability is calculated on dividing the total number of possible outcomes by the number of possible ways the event could occur. Probability and odds are two distinct ideas where odds are calculated by dividing the likelihood of an event by the likelihood that it won't.

mean, μ = 73
standard deviation σ =7.8

η = 24

P (X*=78)

P( Z>3.1403)

Hence, the probability that the mean of their test scores is greater than 78 is 0.0008.

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Answer: I calculated the value after 5 years to be 5,734.40 or 5,734

Step-by-step explanation:

t-distribution in the bank or restaurant to get the customer arrival time is a b) normal distribution.

The t-distribution is defined by degrees of freedom. These are related to sample size. The t distribution is most useful when the sample size is small, the population standard deviation is unknown, or both. As the sample size increases, the t-distribution will become more normal.

The t distribution is the continuous probability distribution of z scores when the estimated standard deviation is used in the denominator instead of the true standard deviation. The purpose of the t-test is to compare a specific characteristic that describes the groups, and the means will be representative of the populations that are normally distributed.

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Answer:

Step-by-step explanation:

You want the statements that describe the function f(x) = 2(x -4)⁴.

The degree of the function is the exponent: 4. This means the function has 4 zeros.

The maximum number of relative extrema is 1 less than the degree. The function has at most 3 relative maximums or minimums.

The even degree means both ends of the graph go in the same direction.

The leading coefficient of 2 is positive, so the ends of the function will go up.

In the parent function f(x) = x⁴, the value of x has been replaced by (x-4). This causes the graph to be translated 4 units to the right.

__

Additional comment

This function has a zero at (4, 0) with multiplicity 4. There is a flat spot where the graph touches, but does not cross, the x-axis. As a consequence, there is only one minimum and no relative maximums.

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