Can u help me with number 7 I

Answer:

5x^2(5x^2 - 1) = 0

Step-by-step explanation:

25x^4 = 5x^2

25x^4 - 5x^2 = 0

5x^2(5x^2 - 1) = 0

Answer:

keep the model answer photo

If the three postal workers sort the mail together or work in parallel, it will take them 15 minutes.

Parallel working refers to the system that can process a common task simultaneously by many workers communicating with one another.

When workers perform the same task together, they tend to achieve greater speed, unlike when they work individually without communicating.

Time to sort a stack of mail by A = 45 minutes or 1/45

Time to sort a stack of mail by B = 25 minutes or 1/25

Time to sort a stack of mail by C = 1/225

Time for the three workers to sort the stack together = 1/45 + 1/25 + 1/225

= 15 minutes (5 + 9 + 1)

Thus, if the three postal workers sort the mail together or work in parallel, it will take them 15 minutes.

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The point EEE represent option b is correct: Marcelina spends the intended amount of money but she bought more than she did intended amount of corn.

She  buy 50kg of corn in total

White corn costs = $0.30 per kilogram,

Yellow corn costs = $0.15 per kilogram,

She wants to spend $12 total.

So the equation will be:

C= (20, 50) = 20 white, 50 yellow

But 30 while and 20 yellow is needed.

Since  C = 20 +50

= 70 corns

While: 30 + 20

= 50 corns.

This therefore tells that Marcelina  spends the intended amount of money but she bought more than she did intended amount of corn and therefore, option b is correct.

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Answer:

Marcelina spends less than the intended amount of money and buys less than enough corn.

Step-by-step explanation:

The equation of line

Khan

Answer:

Step-by-step explanation:

It would be better to purchase onions at 1.99 per pound

Answer:

170

Step-by-step explanation:1/4 is just like dividing 4 so 680 divided by 4 equals 170

Answer:

$0.3 or 30 cents

Step-by-step explanation:

if 12 pack=$360,

1 pack = ?

therefore,$360×1pack ÷ 12 packs=$30

=$30

Using the normal distribution, it is found that there was a 0.9579 = 95.79% probability of a month having a PCE between $575 and $790.

The z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The mean and the standard deviation are given, respectively, by:

[tex]\mu = 700, \sigma = 50[/tex].

The probability of a month having a PCE between $575 and $790 is the p-value of Z when X = 790 subtracted by the p-value of Z when X = 575, hence:

X = 790:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{790 - 700}{50}[/tex]

Z = 1.8

Z = 1.8 has a p-value of 0.9641.

X = 575:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{575 - 700}{50}[/tex]

Z = -2.5

Z = -2.5 has a p-value of 0.0062.

0.9641 - 0.0062 = 0.9579.

0.9579 = 95.79% probability of a month having a PCE between $575 and $790.

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The required probability of giving class period run between 51.5 and 51.75 is 0.125.

The lengths of her classes are uniformly distributed between 50 and 52 minutes.

Probability, can be define as the ratio of favorable events to the n number of total events.

since,

[tex]p(r) = \frac{51.75-51.5}{52-50}[/tex]

p(r) = 0.125

Thus, the required probability of class period runs between 51.5 and 51.75 is given by 0.125

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Determining a car's depreciation over a ten year period is considered a bivariate.

A Bivariate data is made up of two variables that are observed against each other. In determining the deprecation of a car, the cost of the car is observed against the passage of time and the depreciation factor.  

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The characteristics of a population that a random variable represents are 1. As many as you wish and 4. Two or more.

A random variable is a variable with unknown outcomes.

A random variable can have either discrete or continuous values.

It is discrete when it has specific values.  It is continuous when it assumes some continuous values.

Thus, the characteristics of a population that a random variable represents are 1. As many as you wish and 4. Two or more.

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Answer:

(1,2)

Step-by-step explanation:

first, make the equations equal each other so you can solve for x

8x-6=2x

this gives you 1

then, use what you got for x and plug it in for one of the original questions. I am gonna use 2x since its the easiest to plug in and solve

2(1)=2, so y is 2

so then x=1 and y=2

then put that into (x,y) which is (1,2)

The required equation of line BD is option d.)  [tex]y=\frac{2b}{2a-c} x-\frac{2b}{2a-c} c[/tex]

Equation of the line is given be in standard form is
[tex]y-y_{1} =\frac{y_2-y_1}{x_2-x_1} (x-x_1)[/tex]

Line,  curve of  the shortest distance between two points.

The questions seem to be incomplete the question,  the complete question could be  
a)[tex]y=\frac{2b}{2a-c} (x-c)\\[/tex]
b)[tex]y=\frac{b}{-c} x-\frac{2b}{2a-c}[/tex]
c)[tex]y=\frac{2b}{2a-c} x-\frac{bc}{2a-2c}[/tex]
d)[tex]y=\frac{2b}{2a-c} x-\frac{2b}{2a-c} c[/tex]
e)[tex]y=\frac{2b}{a-c} x-\frac{2b}{a-c}[/tex]

Now all the Equation in option represents the triangle with coordinates A(0, 0), B (2a, 2b),  C(2c,0) and D(c, 0).

For equation of line BD we have coordinates, (2a, 2b) and (c, 0).
putting these coordinates in the standard form of equation  of line i.e.
[tex]y-y_{1} =\frac{y_2-y_1}{x_2-x_1} (x-x_1)[/tex]
⇒   [tex]y=\frac{2b}{2a-c} x-\frac{2b}{2a-c} c[/tex]

Thus the required equation of the line is  [tex]y=\frac{2b}{2a-c} x-\frac{2b}{2a-c} c[/tex].

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Answer:

C

Step-by-step explanation:

Edg

The correlation coefficient for two sets of numbers that are perfectly negatively correlated is -1.

Correlation is a statistical measure used to measure the relationship that exists between two variables.  Negative correlation is when two variables move in different direction. If one variable increases, the other variable decreases.

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The price per roll for Lidal and Oldi shop is 0.35 and 0.36 respectively.

Therefore Lidal shop is the best value for money.

Given,

Lidal shop:

8 rolls costs  2.80

∴ one roll costs = 2.80/8

                        = 0.35

Oldi shop:

9 rolls costs 3.24

∴ one roll costs = 3.24/9

                        = 0.36

Hence we get the per price for the shops as 0.35 and 0.36

we can see that for lidal shop if per roll it is 0.35 then if a person wants to buy 9 rolls then it will cost him 3.15, whereas in the case of oldi shop the price for 9 rolls is 3.24.Therefore, lidal shop is the best value for money.

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The required polynomial is [tex]x^{3}-7x^{2} -20x+96[/tex]

Polynomial : If in an expression all of variables, constants and exponents are present with mathematical operations like addition, multiplication, subtraction & division, then it is called polynomial.

If a polynomial has degree 3 as a highest degree, then the polynomial is called degree 3 polynomial or cubic polynomial.

A degree 3 polynomial having zeros α, β, γ and the coefficient of x³ equal a is,  a(x- α)(x- β)(x- γ)

Given, Zeros of the polynomial are -4, 3, 8 & coefficient of x³ equal 1.

Hence, the required polynomial is,

[tex]1(x-(-4))(x-3)(x-8)[/tex]

[tex](x+4)(x-3)(x-8)[/tex]

[tex]=(x+4)(x^{2} -11x+24)[/tex]

[tex]=x^{3}-11x^{2} +24x+4x^{2} -44x+96[/tex]

[tex]=x^{3}-7x^{2} -20x+96[/tex]

This is a degree 3 polynomial.

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Answer:

  ending balance = $623.02

Step-by-step explanation:

Amounts you spend get subtracted from your bank balance. Amounts you earn get added.

Your ending balance is ...

  ending balance = beginning balance - expenses + earnings

  ending balance = $1250.33 -(184.59 +654.50 +112.11) +323.89

  ending balance = $623.02

Answer:

56.26

Step-by-step explanation:

An isosceles triangle has two sides that are the same length, and one side that is the same length. We have two sizes, so two find the greatest possible perimeter we must assume that the greater size is the value for the two sides, and the smaller size the value for the single side. In other words:

[tex]x = 15.6 + 2(20.33)[/tex]

[tex]x = 56.26[/tex]

The net benefit to The Knot if it adopts JIT production at the Spartanburg plant is $200000.

Based on the information given, the net benefit will be:

= $1,000,000 × (1 - 80%)

= $1,000,000 × 0.2

= $200,000

The nonfinancial and qualatative factors that The Knot should consider when making the decision to adopt JIT production are:

The benefit of The Knot implementing an enterprise resource planning (ERP) system is that it gives access to operating information in response to the supply.

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m∠ A = 60°, m∠ A = 60°, m∠ A = 60° and the sum of the angles in the triangle is 180°

It is important to note that the sum of angles in a triangle equals 180°

The given structure is a triangle, thus, the angles sum up to 180°

m ∠ A + m ∠ B + m ∠ C = 180°

m∠ A = 60°

m ∠ B = 60°

m ∠ C = 60°

The sum of the angle in the triangle = 60° + 60° + 60° = 180°

Thus, m∠ A = 60°, m∠ A = 60°, m∠ A = 60° and the sum of the angles in the triangle is 180°

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Based on the calculations, the number of books that were bought by Hugh are 4 books.

In order to determine the number of books that were bought by Hugh, we would substitute the value of the number of magazines into the given equation and then evaluate as follows:

3.95m + 8.95b = 47.65

3.95(3) + 8.95b = 47.65

11.85 + 8.95b = 47.65

8.95b = 47.65 - 11.85

8.95b = 35.8

b = 35.8/8.95

b = 4.

In conclusion, the number of books that were bought by Hugh are 4 books.

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Complete Question:

Hugh bought some magazines that cost $3.95 each and some books that cost $8.95 each. He spent a total of $47.65. If Hugh bought 3 magazines, how many books did he buy? The equation that models the problem is 3.95m + 8.95b = 47.65, where m is the number of magazines and b is the number of books.

The number of ways that the coach can assign the 4 positions to his 16 players would be 43, 680 ways

The formula for permutation is given as;

Permutation = [tex]\frac{n!}{(n - r)!}[/tex]

n = 16

r =4

Permutation = [tex]\frac{16!}{12!}[/tex]

Permutation = [tex]\frac{16 *15*14*13*12*11*10*9*8*7*6*5*4*3*2*1}{12*11*10*9*8*7*6*5*4*3*2*1}[/tex]

Permutation = 43, 680 ways

Thus, the number of ways that the coach can assign the 4 positions to his 16 players would be 43, 680 ways

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The value of F(g(1)) will be equal to 0.

A function is defined as the expression that set up the relationship between the dependent variable and independent variable.

From the given table we can see that the value of f(x) at 1 is 3 and the value of g(x) at 1 is 0.

The value of  f(xg(x) at x = 1 will be:-

f(xg(x) = f(x) x g(x)

           = 3 x 0

           = 0

Therefore the value of F(g(1)) will be equal to 0.

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Answer:

D

Step-by-step explanation:

The population size after 6 years and after 8 years are 147 and 169 population respectively

The standard exponential function is expressed as y = ab^x

where

a is the base

x is the exponent

Given the function that represents the population size P (t) of the species as shown;

[tex]p(t)=\frac{550}{1+5e^{-0.1t}} \\[/tex]

For the population size after 6 years

[tex]p(t)=\frac{550}{1+5e^{-0.1(6)}} \\P(6)=\frac{550}{3.744}\\ P(6)=147 population[/tex]

For the population after 8 years

[tex]p(t)=\frac{550}{1+5e^{-0.1(8)}} \\P(8)=\frac{550}{3.2466}\\ P(8)=169 population[/tex]

Hence the population size after 6 years and after 8 years are 147 and 169 population respectively

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Answer:

Step-by-step explanation:

Answer:

2xy/ ( ab)

Step-by-step explanation:

xy/ ( 3ab) + 5xy/(3ab)

Since the denominator is the same, we can add the numerators

xy+5xy = 6xy

6xy/ (3ab)

We can simplify 6/3 = 2

2xy/ ( ab)

The length of line CD is 20. 9

Note that triangle CDY is an isosceles triangle

Using the Pythagoras theorem

Hypotenuse square = opposite square + adjacent square

Hypotenuse = line CD

opposite = 20

Adjacent = 6

Substitute into equation

[tex]Line CD^2 = 20^2 + 6^2[/tex]

[tex]Line CD^2 = 400 + 36[/tex]

[tex]Line CD^2 = 436[/tex]

Make line CD^2 subject by find the square root of the other side

[tex]Line CD = \sqrt{436}[/tex]

[tex]Line CD = 20.9[/tex]

Therefore, the length of line CD is 20. 9

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Answer:

a) 1 + 3 = 4

b) 2 + 3 = 5

(all prime)

hope this helps! :)

The meaning of this problem is that with 7 nurses they can only hire D=13.25

Generally, the equation for the model is  mathematically given as

[tex]P=1000D^{0.6}N^{0.3}[/tex]

Therefore,

[tex]dv/dD=0.6*1000*D^{0.4}N)^{0.3}[/tex]

[tex]dv/dD=600* \frac{N6.1}{D6.1}=0[/tex]

Also

[tex]dv/dN=300* \frac{N6.8}{N6.7}=0[/tex]

Equations 1 and 2

[tex]300* \frac{D6.8}{N6.7}=600* \frac{N6.1}{D6.1}[/tex]

.sub D=(60N)/4

[tex]300* \frac{((60N)/4)6.8}{N6.7}=600* \frac{N6.1}{((60N)/4)6.1}[/tex]

N=6.67

N=7

solve for D

D=(60(7))/4

D=13.25

In conclusion, with 7 nurses they can only hire D=13.25

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