i ready grade 8 math classroom

please help asap!!!!

Answer:

$0.42

Step-by-step explanation:

Given data

Dimension

Length=4m

Width=2m

Cost=  $1.75

Area= 4*2= 8m^2

Cost per area=1.75/8

Cost per area=$0.21 per m^2

The new poster's dimension

Lenght =2m

Width= 1m

Area= 2*1= 2m^2

Hence if a square meter cost $0.21

Then 2 square meter  will cost x

cross multiply

2*0.21=x

x=$0.42

Hence the new poster will cost $0.42

Answer: I believe yes, as it is simply a multi-variable equation.

Step-by-step explanation: if im wrong, tell me

Answer:

The answer would be B. 12 + 6n is greater than or equal to 30, so n is less than or equal to 3.

explanation:

I'm bad with explaining things, but I'll try my best to explain why this is the right answer.

12 + 6n ≥ 30, so n ≤ 3

let's start with the 12 at the beginning of the inequality, Annie already has $12, so the 12 in the inequality shows the amount of money she already has being added to the $6 per hour of babysitting she needs to do (n).

Now for the + 6n, the plus is there to show that the $12 Annie already has is being added to the 6n. The 6n then represents the $6 Annie makes each hour and the n represents how many hours she needs to babysit in order to get $30. The 6 is being multiplied by the amount of hours she needs to babysit to show how much money Annie would make. Then you add on the $12 she already has.

Annie then needs at least $30, but if she makes more than $30 then she will simply have more money than needed, therefore you use the greater than or equal to sign to show that she can have more money than just $30 after working.

I hope this helps, and sorry if my explanation is hard to understand lol.

Answer:yes it is a triangle

Step-by-step explanation:

let's assume this triangle's sides are a,b and c.

we know this equation: \(a+b > c > |a-b|\\c+b > a > |c-b|\\a+c > b > |a-c|\\a=6\\b=7\\c=9\\13 > 9 > 1--- > which is true\\16 > 6 > 2----- > which is true as well\\15 > 7 > 3------ > it is true,too\\all of this equations are true so, this is a triangle\)

A z-score of 2.14 indicates that Katie's score on the test is quite high and unusual, and places her in the top 2% of the scores in the population.

Katie scored a 93 on a test and her calculated z score was 2.14, that means that her score is 2.14 standard deviations above the mean of the test scores.

A z score represents the number of standard deviations a data point is from the mean of the data set.

A positive z score means that the data point is above the mean, while a negative z score means that the data point is below the mean.

The mean of the test scores was, 80 with a standard deviation of 5, then Katie's z score would be calculated as:

z = (x - μ) / σ

= (93 - 80) / 5

= 2.6

Z scores are useful for comparing data points from different data sets or for comparing data points within the same data set that are measured on different scales.

Katie's score is 2.6 standard deviations above the mean.

A z score of 2.14 would mean that Katie's score is slightly below this value, but still significantly above the mean.

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Answer:

30 + 2x = 5x  i hope this helps

give me your gradma adress imma go there i have milk here

Lol

In a right triangle with side opposite angle β having a length of 16.4 cm and the hypotenuse having a length of 25.1, the approximate value of sin(β) is 0.653.

Approximate value of sin(β) be calculated using the sine formula:

sin(β) = (opposite side) / hypotenuse

1. Identify the opposite side and hypotenuse.
Opposite side = 16.4 cm
Hypotenuse = 25.1 cm

2. Plug in the values into the sine formula.
sin(β) = (16.4 cm) / (25.1 cm)

3. Calculate sin(β).
sin(β) ≈ 0.653

Therefore, the approximate value of sin(β) is 0.653.

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9514 1404 393

Answer:

  CEFA

Step-by-step explanation:

The perimeter is twice the sum of the side lengths.

  P = 2(L+W)

__

1) P = 2(2x +(3x+2)) = 2(5x +2) = 10x +4 . . . . . letter C

2) P = 2((4x+1) +x) = 2(5x +1) = 10x +2 . . . . . . . letter E

3) P = 2(7 +(x+5)) = 2(x +12) = 2x +24 . . . . . . . letter F

4) P = 2(5 +(4x-3)) = 2(4x +2) = 8x +4 . . . . . . . letter A

The code word is CEFA.

Answer:

what's the ratio?

Step-by-step explanation:

Answer:

whats the ratio

Step-by-step explanation:

====================================================

Explanation:

Focus on triangles SVT and UVT.

They are congruent triangles due to the fact that SV = VU and VT = VT. From there we can use the LL (leg leg) theorem for right triangles to prove them congruent.

Since the triangles are the same, just mirrored, this means ST = UT = 23.

-----------------------

Following similar reasoning as the previous section, we can prove triangle RVU = triangle RVS.

Therefore, RS = RU = 8

-----------------------

SV = VU = 5 because RT bisects SU.

Bisect means to cut in half. The two smaller pieces are equal.

-----------------------

SU = SV + VU = 5+5 = 10

Refer to the segment addition postulate.

Answer:

ST=23

RU=8

SV=5

SU=10

Step-by-step explanation:

RT bisects the whole quadrilateral, so a line on one side will be the same length as the line on the opposite side of RT. So:

1. ST=UT, UT=23, so ST=23

2. RU=RS, RS=8, so RU=8

3. SV=VU, VU=5, so SV=5

4. SU=2*SV, 5*2=10, so SU=10

If you still have no clue, just imagine the points R, S, T, and the lines connecting them (this will make a triangle). Then reflect the triangle across line RT, and name the new S point U (the new triangle still has the same line measures) . Make a line from S to U and make a point V from where RT and SU meet. This will make the figure in the picture.

Have a nice day! :)

True. The 3px, 3py, and 3pz orbitals are similar in shape but differ in their orientation or direction.

The p orbitals are one type of orbital that corresponds to the angular momentum number l = 1. These p orbitals are designated as 3px, 3py, and 3pz to indicate their orientations along the x, y, and z axes, respectively.

The p orbitals have a  shape with a node at the nucleus. They consist of two lobes of electron density, one on either side of the nucleus, separated by a region of zero electron density. The lobes are oriented along the designated axes. The 3px orbital points along the x-axis, the 3py orbital points along the y-axis, and the 3pz orbital points along the z-axis. Although they have different orientations, their shapes and sizes are the same.

So, while the 3px, 3py, and 3pz orbitals differ in their orientation in space, they share the same overall shape and size.

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Answer:

1) \(y-6=-\frac{2}{3} (x-1)\) and 2) \(y=-\frac{2}{3} x+\frac{20}{3}\)

Step-by-step explanation:

Ikr the bots are annoying.

Point-slope form is written as: \(y-y_1=m(x-x_1)\)

Slope intercept form is written as: \(y=mx+b\)

We also need to find the slope before putting it in this form, which can be done by \(m=\frac{y_2-y_1}{x_2-x_1}\)

1) Points given are (1,6) and (-2,8)

Slope: \(m=\frac{8-6}{-2-1} =-\frac{2}{3}\)

You can choose either of the two points to put into the formula. I just chose (1,6)

Answer: \(y-6=-\frac{2}{3} (x-1)\)

2) Same points as before and we have the same slope as before. All we need is to find the y intercept which is our b in the equation. You can easily do this by plugging in a point and solving for b. I will choose point (1,6) again.

\(6=-\frac{2}{3} (1)+b\)

\(6=-\frac{2}{3} +b\)

\(6+\frac{2}{3}=-\frac{2}{3} +\frac{2}{3} +b\)

\(b=6+\frac{2}{3}=\frac{20}{3}\)

Answer: \(y=-\frac{2}{3} x+\frac{20}{3}\)

39 subjects were tested in this simple one-way ANOVA.

The df for F distribution is (treatment df, error df)

Using given information

Treatment df = 7

Error df = 31

Total df= 7+31 = 38

Again, total df = N-1, N= number of subjects tested

Then, N-1 = 38

=> N= 39

One-way ANOVA is typically used when there is a single independent variable or factor and the goal is to see whether variation or different levels of that factor have a measurable effect on the dependent variable.

The t-test is a method of determining whether two populations are statistically different from each other, and ANOVA determines whether three or more populations are statistically different from each other.

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Answer:

---------------------

Solve the equation for p by taking the square root:

Answer:

\(p=\±\dfrac{1}{2}\)

Step-by-step explanation:

\(\sf p^2=\dfrac{9}{36}\)

First, divide both sides by 9 to write the fractions in their simplest form.

\(\sf p^2=\dfrac{1}{4}\)

To find the value of p, put the square root on both sides.

\(\sf p=\±\sqrt{\dfrac{1}{4}}\\\\p=\±\dfrac{1}{2}\)

The time series component that exhibits a repeating pattern over successive periods, often one-year intervals, is called the seasonal component. It represents the regular and predictable variations in the data that occur due to seasonal factors, such as weather patterns, holidays, or annual events.

The seasonal component typically follows a consistent pattern, where the values tend to rise and fall in a similar manner within each season. For example, retail sales may experience higher values during the holiday season each year and lower values during other times.

Identifying and analyzing the seasonal component is crucial in many fields, including economics, finance, marketing, and forecasting. By understanding and accounting for the seasonal patterns, analysts and decision-makers can make more accurate predictions, adjust for seasonality in data, and develop strategies to optimize operations or sales during specific periods.

Methods such as seasonal decomposition or seasonal adjustment techniques are used to separate the seasonal component from other components, such as trend and irregular fluctuations, in order to better understand the underlying patterns and make informed decisions based on the data.

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Answer:

5x(5-2y)

Step-by-step explanation:

If this helped hen consider making my answer brainliest

Answer:

r≈1.78

Step-by-step explanation:

Answer:

A.32.10

Step-by-step explanation:

You have to remember to subtract the $35 then start to figure out how much he paid every month for a year.

Answer:

The answer is 8

Step-by-step explanation:

As you can see each time we add we add 1

1+0=1

1+1=2

1+2=3

1+3=4

1+4=5

1+5=6

1+6=7

1+7=8

Answer:

2, 5, 10, 50, 55, 275, 280

Step-by-step explanation:

hope this heled you.. :)

Step-by-step explanation:

1.)

a(5 x 7)

a(35)

35a

2.)

c + ( 17 + 8)

c + (25)

c + 25

Answer:

C

Step-by-step explanation:

1x5=5

3x6=18

and you can't simplify 5/18.

Answer:

5/18

Step-by-step explanation:

1 times 5 equals 5.  3 times 6 equals 18.

Answer:

how many floors the elevator goes down per unit of time

Step-by-step explanation:

not sure what the unit of time is but its seconds or minutes im pretty sure it doesnt say

Answer:

The elevator started at floor 7

Step-by-step explanation:

The y-intercept is when x is 0

In this situation x represents time, so when no time has passes yet y is at 7

This means that the elevator was at floor before any time passed (before it started moving)

hope this helps, lmk if it doesnt :)

12 cm, 35 cm, 37 cm measurements could not represent the side lengths of a right triangle. So the option C is correct.

The Pythagorean Theorem states that the sum of the squares of the two shorter sides of a right triangle must equal the square of the longest side.

The Pythagorean Theorem states that in a right triangle, the sum of the squares of the two legs (the sides that make the right angle) is equal to the square of the hypotenuse (the side opposite the right angle). Mathematically, this can be written as a² + b² = c².

So the sides of option C "12 cm, 35 cm, 37 cm" could not represent the side lengths of a right triangle because 12 cm² + 35 cm² ≠ 37 cm², these side lengths could not represent a right triangle.

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Answer:

look at the screenshot

Step-by-step explanation:

The coordinates of an undefined slope are points that are either the same or have no x-value. In both cases, the slope of a line between these points would be undefined because it would involve dividing by 0, which is not allowed in mathematics. This is because the slope of a line is calculated by dividing the difference in y-coordinates by the difference in x-coordinates, and if the x-coordinates are the same or do not exist, this division would result in an undefined value.

The length, width, and height of the box using appropriate units (e.g., centimeters, inches) and then multiply these measurements together to calculate the volume of the box.

Since there is no specific diagram or equation mentioned in the question, I am unable to determine the exact equation Kylie used to find the volume of her box of hair clips. However, I can provide a general equation for finding the volume of a rectangular prism, which is commonly used to represent a box shape.

The equation for finding the volume of a rectangular prism is:

Volume = Length × Width × Height

In the context of Kylie's box of hair clips, she would need to measure the length, width, and height of the box using appropriate units (e.g., centimeters, inches) and then multiply these measurements together to calculate the volume of the box.

It is important to note that without specific dimensions or additional information about the box's shape or size, we cannot determine the exact equation Kylie used.

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Using a gamma distribution calculator, we find that P(1.8 < X < 2.4) ≈ 0.332.

Gamma distribution:

A gamma distribution is a family of continuous probability distributions characterized by two parameters: a shape parameter (α) and a rate parameter (β).

The gamma distribution is a two-parameter family of continuous probability distributions. The gamma distribution is a two-parameter family of continuous probability distributions. It can be used to model the waiting time for a given number of radioactive decays to occur in a fixed amount of time or the amount of time it takes for a queue to empty out.

Solving for the probability of a given interval for a gamma distribution requires the use of the cumulative distribution function, which cannot be expressed as an elementary function.

Thus, we need to use a mathematical software or calculator with the capability to calculate the gamma distribution to solve this problem.

Using a gamma distribution calculator with the parameters α = 2 and β = 1, we can find that P(1.8 < X < 2.4) ≈ 0.332.

This means that the probability of X being between 1.8 and 2.4 is approximately 0.332 or 33.2%. Therefore, the answer is option (D) 0.33.

The gamma distribution is a two-parameter family of continuous probability distributions. It can be used to model the waiting time for a given number of radioactive decays to occur in a fixed amount of time or the amount of time it takes for a queue to empty out.

It is a versatile distribution that has been used in a wide range of applications, including finance, physics, and engineering.

In summary, to find the probability of a given interval for a gamma distribution, we need to use the cumulative distribution function.

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