Let ​f(x)=8-2x. Find f(-4)

The mark-up, as a percentage =80%

What is Markup?

The term "markup" describes the discrepancy between a product's selling price and its actual cost. It is specified as a percentage over the price. In other words, the seller makes a profit when the price of the commodity.

A unit's gross profit, which is the sales price less the cost to create or buy it for resale, is divided by its cost to determine the markup %. The markup percentage is computed as (12 - 8) / 8 and is equal to 50% if an item costs the business $8 to produce but is sold for $12.

Markup percentage = [(selling price - unit cost)/unit cost]*100

                                 = [(900-500)/500]*100

                                 =  [ 400/500] *100

                                 = 80%

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The proportion of the output that is unacceptable is; 0.32

The empirical rule of statistics is also called the 68 - 95 - 99.7 rule, and it states that states that for normal distributions, 68% of observed data points will lie inside one standard deviation of the mean, 95% will fall within two standard deviations of the mean, and 99.7% will occur within three standard deviations of the mean.

We are told that the target diameter is 50 mm.

Mean; μ = 50 mm

Standard deviation; σ = 0.07 mm

An acceptable diameter is one within the range 49.93 mm to 50.07 mm. Thus;

50 ± x(0.07) = (49.93, 50.07)

Thus;

50 - 0.07x = 49.93

0.07x = 50 - 49.93

x = 0.07/0.07

x = 1

Thus, the proportion that is acceptable is 68% or 0.68.

Proportion unacceptable = 1 - 0.68 = 0.32

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Answer:

we know that

XY+YZ=XZ

solve for YZ

YZ=XZ-XY

XZ=21

XY=8

so

YZ=21-8

YZ=13

therefore

the answer is

YZ=13

Step-by-step explanation:

The probability is 0.2005.

What is a probability distribution?

A probability distribution is a function that describes the probabilities of different outcomes in a random event or experiment. It is used to represent the likelihood of different outcomes occurring in a given situation.

Mean = 650 * 200 = 130000

[tex]\sigma \bar x = \sqrt{n}\times\sigma\\\\=\sqrt{200}*420\\=5939.6970\\\\\\P(X < 125000)=P[Z < \frac{125000-130000}{5939.6970}]\\\\P(X < 125000)=P[Z < \frac{-5000}{5939.6970}]\\\\P(X < 125000)=P[Z < -0.84]\\\\P(X < 125000)=0.2005[/tex]

Hence, the probability is 0.2005.

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the height of a binary tree is the number of edges in the longest path from the root to a leaf.The best-case height of a binary tree with seven nodes is 3.

A binary tree is a type of tree structure consisting of nodes that are connected by edges. The number of edges in the longest path from a binary tree's root to a leaf determines the tree's height.In the best-case scenario, the binary tree is perfectly balanced and each node has exactly two children. With seven nodes, the best-case height is three because each node has two children and three edges connect the root node to the leaves. This means that the longest path from the root to a leaf is three edges, resulting in a height of three.

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The value of x will be;

⇒ x = 6

A linear expression is an algebraic statement where each term is either a constant or a variable raised to the first power.

Given that;

The expression is,

⇒ 5 1/2x + 2/3x = 37

Now,

Since, The expression is,

⇒ 5 1/2x + 2/3x = 37

Solve for x as;

⇒ 11/2x + 2/3x = 37

⇒ (33 + 4)x/6 = 37

⇒ 37x = 37 × 6

⇒ x = 6

Thus, The value of x = 6

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The weight of the baseball equipment will be 39/5 pounds.

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Given that;

A container that weighs 23 2/5pounds holds sports equipment.

And, Of the equipment in the container, of the 1/3 weight is baseball equipment.

Now,

Since, A container that weighs 23 2/5pounds holds sports equipment.

And, Of the equipment in the container, of the 1/3 weight is baseball equipment.

Hence, The weight of the baseball equipment = 23 2/5 × 1/3

                                                                         = 117/5 × 1/3

                                                                         = 39/5 pounds

Thus, The weight of the baseball equipment =  39/5 pounds

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False.It represents that a is parallel to b.

Using the null hypothesis test we calculate that variance is less than 6.25 .

Data sample is 0.05.

20 people make up the sample.

And ,

The theories are:

H₀ : μ² = 6.25

H₁ : μ² < 6.25

The critical value = 10.117.

If the test statistic is less than this number, the null hypothesis will be rejected. When the p-value is less than or equal to your significance level, we reject the null hypothesis. The alternative theory, which contends that the effect is widespread, is supported by your sample data. The null must be removed when the p-value is low, as a mnemonic device.

This is the test statistic:

2.976 × 19 / 6.25 = 9.047.

Therefore, we disregard the null hypothesis. The difference is less than 6.25 since it is not 6.25.

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Using ratio and scale factor, the value of x is 31 mm

The ratio is defined as the comparison of two quantities of the same units that indicates how much of one quantity is present in the other quantity.

This is a term that is used to compare two or more numbers. It is used to indicate how big or small a quantity is when compared to another. In a ratio, two quantities are compared using division.

The value of x that will make the figure similar can be calculated by multiplying the smaller figure by the scale factor.

To determine the scale factor, let's find the ratio between two similar sides

scale factor = 29 / 14.5

scale factor = 2

The value of x will be 2 * 15.5 = 31 mm

The value must be 31mm

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The equation to represent money spend and the quantity of salad and pizza is E = $5.00*x + $2.00*y

where x represent the quantity of bowl of salad and y represent the quantity of slice of pizza.

What is equation in mathematics?

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.

Equations come in two varieties: identities and conditional equations. All possible values of the variables result in an identity. Only certain combinations of the variables' values make a conditional equation true.

According to the given question:

The equation to represent money spend and the quantity of salad and pizza is E = $5.00*x + $2.00*y

where x represent the quantity of bowl of salad and y represent the quantity of slice of pizza.

The table to represent the result of above equation is

Budget (in $)             Salad (bowl)         Pizza (slices)

 40.00                              0                            20

 40.00                              2                            15

 40.00                              4                            10

 40.00                              6                             5

 40.00                              8                             0

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The value of the variable 'x' in the given isosceles right angle triangle is 2√2. By applying the Pythagoras theorem, we get the required value.

An isosceles right angle triangle has a right angle and equal lengths of two sides. (the other two angles are also the same in measure for an isosceles triangle).

Given triangle has two angles of 45° and one angle of 90°, then the triangle is "an isosceles right angle triangle.

It is also given that, hypotenuse h = 4 and the opposite side is given by x.

Since it is an isosceles right triangle, the two sides are also equal in measure.

I.e., opposite side length = adjacent side length = x

Then, applying the Pythagoras theorem, we get

h² = (opp)² + (adj)²

⇒ (4)² = x² + x²

⇒ 16 = 2x²

⇒ x² = 8

∴ x = 2√2

Thus, the value of the length x = 2√2.

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the vector function represents the curve of the intersection between a cylinder and a plane in 3-dimensional space.r(t) = (cos(t), sin(t), 2t)

The vector function represents the curve of the intersection between a cylinder and a plane. The function is given by r(t) = (cos(t), sin(t), 2t). This means that the x-coordinate of the point on the curve is given by cos(t), the y-coordinate of the point on the curve is given by sin(t), and the z-coordinate of the point on the curve is given by 2t.

The parameter t is defined as t [tex]$\in$[/tex] [tex][0, $\pi$/2],[/tex] which means that the domain of t is from 0 to [tex]$\pi$[/tex]/2. Therefore, the vector function represents the curve of the intersection between a cylinder and a plane in 3-dimensional space.

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The parallelogram with the parametric equations 1 + 2u + v is the surface integral.

The surface element is

dS is equal to || r/u x r/dv || du dv.

where

r (u, v) is equal to x (u, v) I plus y (u, v) j plus z (u, v) k

r (u, v) = (u + v) I plus (u -v) j plus (1 + 2u + v) k

is the surface S's vector parameterization.

The surface's normal vector is

R / u x R / d

= I + j + k + 2) x I - j + k)

= 3 I + j - 2 k

as well as norm

|| r/dv x u r/u || = √(3² + 1² + (-2)²) = √(14) (14)

Calculate the integral now:

∫∫ (x + y + z) dS = √(14) ∫₀¹ ∫₀² (1 + 2u + v) = ((u + v) + (u - v)) du dv

= (14)... 01... 02 (3u + v + 1) du dv

= (14), 01 (3/2 u2, uv, and u), |02 dv

= √(14) ∫₀¹ (8 + 2v) dv

= √(14) (8v + 2v²) |₀¹

= 10 √(14) (14).

The parallelogram with the parametric equations x = u + v, y = u â' v, and z = 1 + 2u + v is the surface integral.

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By solving the mean value theorem, the value of c in the interval (1,2) is 0.75.

Explanation:

The mean value theorem states that if a function f(x) is continuous on a closed interval [a,b] and differentiable on the open interval (a,b), then there exists at least one point c in (a,b) where the equation f'(c) = (f(b) - f(a))/(b - a) is satisfied.

For the specified interval (1,2) and given equation 1.2/x - 1.6, we can rearrange the equation to solve for c:

1.2/c - 1.6 = 0

1.2/c = 1.6

c = 1.2/1.6

c = 0.75

Therefore, the value of c in the interval (1,2) is 0.75.

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The function f(x) in slope-intercept form is Y= −3X−10.

In the given question, linear function f, f(2)=0 and f(4)=-6.

We have to write function f(x) in slope-intercept form.

We have to find equation for f(x)

f(2)=0, and f(4)=−6,

Now we have to find slope

Slope(m)=−6−0/4−2

m = −6/2

m=−3

Now the general equation of line is

Y=MX+C

where M = slope of the line, C is the Y intercept value, X is independent variable and Y is dependent variable.

At point (2,4)

4 = (−3)×(2)+C

4 = −6+C

Add 6 on both side, we get

C = 10

Equation for f(x) is.

Y=(−3)X−(10)

Y= −3X−10

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Answer:

Answer:

its the

Step-by-step explanation:

Each of the three choices has a 12.25 standard deviation average returns during a 4-year timeframe.

In order to find standard deviation on a mutual fund, add up the rates of return for the period you want to measure and divide by the total number of rate data points to find the average return and take each individual data point and subtract your average to find the difference between reality and the average finally we have to square each of this numbers and then add them up.

Here, we had provided the predicted return on the asset, the standard deviation,

s x 10% 5%

y 15    8

Here we need to calculate the standard deviation of returns over the 4-year period for each of the three alternatives.

As per the definition of the standard deviation, we have identified that the values,

Count, N: 2

Sum, Σx: 23

Mean, μ: 11.5

Variance, σ2:  12.25

Here, we must embrace the alternative hypothesis that seems to be rejected hypothesis. The rejection zone is indicated by the z score of -0.40.

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By using addition, it can be calculated that, Sum of [tex]9x^2 + 6[/tex] and [tex]2x^2 - x - 10[/tex] is [tex]11x^2 - x -4[/tex]

What is addition?

Addition is a basic math operation that combines two or more numbers to create a new total. It is the process of combining two or more values to get a single sum. Addition is one of the four basic operations in math, alongside subtraction, multiplication, and division. It is a fundamental part of arithmetic and is widely used in everyday life for tasks such as counting, budgeting, and measuring. Addition can be performed with any type of number, including whole numbers, fractions, decimals, and even negative numbers. Addition is an incredibly useful tool for solving a variety of math problems.

Sum of [tex]9x^2 + 6[/tex] and [tex]2x^2 - x - 10[/tex]

[tex]9x^2 + 6 + 2x^2 - x - 10\\= 11x^2 -x - 4[/tex]

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Mathematics is a discipline that has a long and rich history. It has evolved over time from simple counting and measuring to a broad and complex subject that is used in many fields. The development of mathematics has been driven by the need to solve practical problems, as well as the desire to understand the underlying patterns and structures of the world around us.

Early forms of mathematics, such as counting and measuring, were developed by ancient civilizations to solve practical problems such as trade, construction, and agriculture. These early forms of mathematics were based on empirical observations and were often tied to the physical world.

As mathematics developed, it began to include more abstract concepts such as numbers, geometry, and algebra. These abstract concepts allowed for the development of more complex mathematical techniques and the ability to solve a wider range of problems.

Today, mathematics is used in a wide range of fields including science, engineering, economics, and even art. It is an essential tool for understanding and solving problems in the world around us.

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let P as the amount of tripod

12(32 + P) = 552

384 + 12P = 552

12P + 384 - 384 = 552 - 384     (subtract 384 from both sides)

12P = 168

P = 14

12(32 + 14) = 552

12(46) = 552

552 = 552

Therefore, the amount of one tripod is $14.

Step-by-step explanation:

The true statement regarding the equation x² + y² - 3x + 6y = 7x + 2 is that it has a area of 36π sq. unit ,  correct option is (b) .

In the question ,

it is given that ,

the equation is x² + y² - 3x + 6y = 7x + 2 ,

On simplifying and rewriting the equation ,

we get ,

x² - 10x + 25 + y² + 6y + 9 = 36

further it can be written as ;

(x - 5)² [tex]+[/tex] (y [tex]+[/tex] 3)² [tex]=[/tex] 36

(x - 5)² + (y + 3)² = 6²

the equation represents a circle .

So , the from the above equation we can conclude that :

the center of the circle will be  = (5,-3) .

the radius is = 6 units .

the diameter will be = 12 units , and

the area of the circle will be = πr² = 36π square units .

So , the statement that matches with the information is that the area is 36π square units .  

Therefore , the True statement is (b) it has a area of 36π sq. units  .

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Answer:

[tex]-1 < x < 0\\0 < x < 1[/tex]

Step-by-step explanation:

At those range, the slope is negative. As the line is going right, it is going down.

The total cost of chocolate sprinkles is $800

Place value charts

This is an implementation of the numeral system that shows the value of each digit in a number using their positions

WHAT IS IMPLENTATION?

What do you mean implementation?

Implementation is the execution or practice of a plan, a method or any design, idea, model, specification, standard or policy for doing something. As such, implementation is the action that must follow any preliminary thinking for something to actually happen.

From the complete question, we have the following parameters:

Unit rate = $8.00

Total pounds = 100

Total cost of chocolate sprinkles

So, the total cost of chocolate sprinkles is calculated using the following formula

Multiply both sides of the equations by 100

Hence, the total cost of chocolate sprinkles is $800

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standard form: 6x+y=-40

Answer:

y= -6x-40

Step-by-step explanation:

standard form is y=mx+b

y+4= -6(x+6)

y+4= -6(x) -6(6)

y+4= -6x-36

-4.        -4

y= -6x-40

hopes this helps have a great day

Based on the given information , the proof of triangle PQR ≅ triangle PSR is shown below .

In the question ,

two triangles PQR and PSR are given where ;

it is given that side  QR ≅ SR

and  PQ ≅ PS .

we have to prove that ΔPQR congruent to ΔPSR .

In triangle PQR and triangle PSR .

side QR = side SR              .....given that QR ≅ SR ;

side PQ = side PS              .....given that PQ ≅ PS ;

side PR = side PR              .....because PR is the common side ;

Hence by SSS congruence , triangle PQR ≅ triangle PSR .

Therefore , it is proved that  triangle PQR ≅ triangle PSR  .

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Answer:

I think the answer is B

Step-by-step explanation:

1.2 * 10^6 is 1,200,000

1.38 * 10^7 is 13,800,000

you just have to divide 13,800,000 by the numbers until you get to 1,200,000. So, 13,800,000 / 11.5 is 1,200,000

Hope this helps! Have an amazing day :)

Answer:

11.5

Step-by-step explanation:

we will need to divide both of them

1.38 × 10^7 ÷ 1.2 × 10^6

1.38÷1.2 × 10^7-6

= 1.15 × 10¹

= 11.5