Please help an 8th grader in needdddddddddddd!!!!!!!!

Considering the given scatter plot, it is found that:

a. The line of best fit is: y = -0.245x + 5.59.

b. The correlation coefficient is: r = -0.57.

c. The interpretation of the correlation coefficient is of: There is a negative association between y and x.

d. The estimate of y when x = 12 is of: 2.65

A scatter plot is a set of points of a data-set, and these points are used to calculate both the correlation coefficient and the line of best fit.

For this problem, the points are given as follows:

(0,5), (1,7), (2, 6), (3, 4), (4, 3), (5,5), (6,4), (7,2), (8,5), (9,3), (10,4).

Inserting these points into a linear regression calculator, the line of best fit is given as follows:

y = -0.245x + 5.59.

Hence the estimate of y when x = 12 is obtained as follows:

y = -0.245(12) + 5.59 = 2.65.

Inserting these points into a correlation coefficient calculator, the correlation coefficient is given as follows:

r = -0.57.

The interpretation is that there is a negative association between y and x, which is neither strong neither weak, as the absolute value of the coefficient is close to the threshold of 0.6.

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Answer:

320,000.00

Step-by-step explanation:

Answer: b ≈ 74.605 meters

Step-by-step explanation:

    Let b be the length of the blue rope, r be the length of the red rope, and g be the length of the green rope. We will write different equations to show the situation given.

         b =  2r

         g = 8b

         b + r + g = 708.75 meters

    Next, we will substitute expressions into the last equation for the variables r and g so we can solve for b.

b + r + g = 708.75 meters

b + ([tex]\frac{b}{2}[/tex]) + (8b) = 708.75 meters

9.5b = 708.75 meters

b ≈ 74.61 meters

    b ≈ 74.605 meters

The probability that a truck drives at least 63 miles in a day is 0.9649

The probability is solved using z scores, this measures the amount of standard deviation sample X is from mean.

the formula is below

z = (X - μ) / σ

Definition of variables

mean, μ = 130 miles per day

standard deviation, σ = 37 miles per day

X = 63 miles per day

score, z

substituting into the formula

=  (X - μ) / σ

= (63 - 130) / 37

= -1.81081 the p value for = 0.035085

the probability is calculated to be 1 - 0.035085 = 0.9649

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The number of gallons of gas which Mrs. Josey and her family would need is; 17.5 gallons of gas.

It follows from the task content that the quantity of gas in gallons needed by Mrs. Josey and her family to make it to Dallas is to be determined.

Therefore, since one gallon of gas is enough for 20 miles, It follows that the amount of gas required for 350 miles can be determined by proportion as follows;

20/1 = 350/x

x = 350 / 20

x = 17.5 gallons of gas.

Ultimately, the amount of gas needed for Mrs. Josey and her family to make it to Dallas is; 17.5 gallons of gas.

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The sinusoidal equation for the graph in terms of Y, the temperature in degrees Celsius) and the time, T in hours is; Y = 3·sin((π/12)·(T + 6)) + 15

A sinusoidal equation or function is an oscillating and periodic function that is based on the sine of an angle.

The function of the graph is a sinusoidal function with the parts;

a = The amplitude

b = The frequency = 1/T

T = The period of the function

k = The vertical shift of the function

h = The horizontal shift of the function

From the graph, we have;

The minimum  point on the graph of the function = (1, 12)

The maximum point on the graph of the function = (13, 18)

The amplitude of the graph a is therefore; a = (18 - 12)÷2 = 3

The period of the graph = 1/b

1 cycle is completed in 24 hours, which indicates that the frequency of the function is; f = 2·π/24 = π/12 = b

The vertical shift, k from the parent function, y = sin(x) which is the distance the midline of the graph is raised above the x-axis is; k = 15

sin((π/12)·(0 - h)) = -1

((π/12)·(0 - h)) = -π/2

-h = 6

h = -6

The function, y = a·sin(b·(t - h)) + k, is therefore;

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Answer:2

Step-by-step explanation: I don’t have a explanation

Answer: 2

Step-by-step explanation:

You should be able to do this...

Check the picture below.

so in the parallelogram, the two triangles split by the side AC are congruents as you can see there by AAS, that means their sides and angles are congruent, that also includes the exterior angles.

since the exterior angles are also congruent, we can extend lines BC and AD as you see there in green and run an exterior angle at vertices A and C, since those two exterior angles are congruent and are also alternate interior ones, voila! it must be that BC || AD.

Answer:

Slope intercept form is achieved by isolating y to one side. 3x-6y=18: given. -6y=-3x+18: algebra. y=3/6x-3: simplifying.

The present age of Tom is 12 years old

Jan is five years older than Tom

The age of Tom = x

The age of Jan = x + 5

After 3 years

The age of Tom = x + 3

The age of Jan = x + 5 + 3

= x + 8

The Tom's age is 3/4 of Jan's age

Then the equation will be

x + 3 = 3/4(x + 8)

Apply distributive property

x + 3 = (3/4)x + 6

x - (3/4)x = 6 - 3

Subtract the terms

1/4 x = 3

Move 1/4 to the right hand side of the equation

x = 3 ÷ 1/4

x = 3 × 4

Multiply the terms

x = 12 years old

Hence, the present age of Tom is 12 years old

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The key features of the exponential function modeled in terms of this situation and how can they be interpreted are;

1) The y-intercept is 15,000.

2) The y-intercept represents the number of bacteria when treatment began.

3) The asymptote indicates that as time increases, the number of bacteria approaches 0.

The general formula for an exponential function is;

y = aˣ

Now, an asymptote of a curve is defined as a line that exists in a way that the distance that exists between the curve and the line approaches zero as either one or both of the x or y coordinates approaches to infinity.

From the given graph, we can say that the y-intercept which is where the curve intersects the y-axis is 15,000 and this indicates the number of bacteria that existed prior to treatment.

The asymptote of the graph would likely be around x = 1 and it indicates that as time increases, the number of bacteria approaches 0.

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In the given ΔDEF x is 17 units and y is 2 units.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

Given, GH is the midpoint of ΔDEF and EF is the base of the ΔDEF with a length of 28 units.

We know the midpoint of ΔDEF is (1/2) EF.

∴ GH = (28/2) = 14 units.

Now GH = x - 3.

14 = x - 3.

x = 17.

Given DH and FH are equal.

∴ y + 8 = x - 7.

y + 8 = 17 - 7.

y + 8 = 10.

y = 2.

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Answer:

5/4

Step-by-step explanation:  

(2/3)/(8/15)

= (2/3)(15/8)

= (2*15)/(3*8)

= 30/24

= 5/4

The correct answer is:  " [tex]\frac{5}{4}[/tex] " ; {written as an improper fraction} ;

                                 or:  " 1.25 " ; {written as a decimal value} ;
                                 or:  " [tex]1\frac{1}{4}[/tex] " ;  {written as a mixed number fraction}.
__________________

Step-by-step explanation:

Given:   [tex]\frac{2}{3}[/tex] ÷ [tex]\frac{8}{15}[/tex] = ? {for which we shall solve}.

Note:  'Dividing by' a value; results in the same value as 'multiplying by' its reciprocal value [that is: 'multiplying by its inverted form'].

This is especially noteworthy in problems that involve 'dividing by fractions'.

So, to solve and simply our given problem:
[tex]\frac{2}{3} * \frac{15}{8}[/tex]  =  ? ;
Note:  The 2 cancels out to 1 ; and the 8 cancels out to 4 ;
         The 3 cancels out to 1 ; and the 15 cancels out to 5 ;
→ since:  {8 ÷ 4 =  2 } ;  &  {2 ÷ 2 = 1} ;
        and :

→ since:   {15 ÷ 3 = 5 } ;  & {3 ÷ 3 = 1 } .
______
We can rewrite our "further simplified" expression as:
→   [tex]\frac{1}{1}[/tex] * [tex]\frac{5}{4}[/tex]  ;

=  "  1 *   [tex]\frac{5}{4}[/tex]  " ;

=  "  [tex]\frac{5}{4}[/tex] " .

Further explanations:
1)  Note:  Re:  the "commutative property" of multiplication:
         " a * b = b * a " ;  or, write as:   " ab = ba " ;    
As such:      "  1  *   \frac{5}{4}  " ;  is the same as:
              ↔  "   [tex]\frac{5}{4}[/tex]  * 1 " .

2)  Note:  Re:  the identity property of multiplication:
 Any value, multiplied by "1", results in/ retains its same value}.  
As such;  our calculated value:
        "   [tex]\frac{5}{4}[/tex]   *  1  "   =    \frac{5}{4}  " .

3)  Note:  Re: the division of one (1) property of division:
Any value, divided by "1" ; results in that same initial value.
As such:  our calculated value:  " [tex]\frac{1}{1}[/tex]  = (1 ÷ 1) = 1 " ;

4)  Note:  Re:  the division by itself property of division:
Any value (except "0"), divided by itself, is equal to "1 " ;
As such:  our calculated value:  " [tex]\frac{1}{1}[/tex]  = (1 ÷ 1) = 1 " ;
______  

So, this answer—which is the most simplified, improper fraction—
is: " [tex]\frac{5}{4}[/tex] " .

Or, to write as a mixed fraction:
   Use the mnemonic:

     [tex]\frac{n}{d}[/tex]  = M [tex]\frac{a}{d}[/tex] ;

That is: "numerator/denominator =  M( [tex]\frac{a}{d}[/tex] )"  ; {"M a/d" !} l

⇒ in which M is the [calculated singular whole number portion within the mixed number equivalent] ;
⇒ followed by " [tex]\frac{a}{d}[/tex] "  ; in which d is the same denominator as that of the improper fraction ;
⇒ & in which a is the calculated numerator value for the fraction portion for this number ;

So:  " \frac{5}{4}} "  =  (5 ÷ 4)  = 1.25 =   1 [tex]\frac{1}{4}[/tex]  " .
______

Long division method:
__________________________________________
              1 R 1 ; ⇒    1 + (1/4) ;  that is;  " 1 + (remainder) / (divisor)";
          4⟌5                                           →  1  +  ( 1 / 4)  ;
          −  4                                           =   "  1 [tex]\frac{1}{4}[/tex]  ".            
               1       ;               So, " [tex]1\frac{1}{4}[/tex]  " ;  as a mixed number fraction.

or:  Use a fraction calculator to convert improper fractions into mixed number fractions.

________________________
or:  Use a calculator:  " {5 ÷ 4} = 1.25 " .

____
The correct answer is:  " [tex]\frac{5}{4}[/tex] " ; {written as an improper fraction} ;

                                 or:  " 1.25 " ; {written as a decimal value} ;
                                 or:  "  [tex]1\frac{1}{4}[/tex]  " ;  {written as a mixed number fraction}.
____

Hope this answer is helpful!

Wishing you the best!

____

Answer:

infinite

Step-by-step explanation:

(i) The value of x is equal to 30 and the equation has one solution and it is neither identity nor contradiction.

(ii) This equation has infinite number of solutions and it is an identity.

(iii) This equation has no solutions and it is a contradiction.

What is identity and contradiction?

An identity is an equation that can be solved using any integer that can replace the variable in the equation in a meaningful way. A conditional equation is one that is met by some numbers but not by others, such as 2x = 4. A contradiction is an equation, such as x = x + 1, that cannot be solved.

We know that,

An equation having infinitely many solutions is called an identity equation.

An equation that having no solution is called a contradiction.

(i) 6x + 4x - 6 + 24 + 9x

Combining like terms

x = 30

Therefore, The value of x is equal to 30 and the equation has one solution and it is neither identity nor contradiction.

(ii) 25 - 4x = 15 - 3x +10 - x

Combining like terms

0 = 0

It means, The equation is true for all values of x.

Therefore, This equation has infinite number of solutions and it is an identity.

(iii) 4x + 8 = 2x + 7 + 2x - 20

Combining like terms

8 = -13

It means, The equation is not true for any value of x.

Therefore,  This equation has no solutions and it is a contradiction.

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Answer: The minimum is 13.5

Step-by-step explanation:

But if I got to multiply the 12 also it will be 162

Answer:0.0013

Step-by-step explanation:

Answer: the answer is on  the calclulator

Step-by-step explanation:

Answer:

Step-by-step explanation:

300 grams-24 hour= 276 so i think u just need to keep doing this till it gets to 206.4

The equation which represents the number of hours will be ln(206.4) = 1200ln(0.014).

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that a candle weighs 300 grams (g). Each hour the candle is lit, it burns 4 g of its wax. a. Leth be the number of hours the candle burns.

The equation for the number of hours will be calculated as,
[tex]h=300\times (0.014)^h[/tex]

lnh= 300 x ln(0.014)

Therefore, the equation which represents the number of hours will be ln(206.4) = 1200ln(0.014).

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According to the law of exponent, the value of positive exponent is greater than the negative exponent, this defines that they are not equal.

Exponent

Exponent refers the number of times a number is multiplied by itself.

Given,

Here we need to verify that, if  two expressions with exponents are a perfect match except one has a negative exponent and the other has a positive exponent, like 5³ and 5⁻³, then how does the exponent change the meaning of the expression.

According to the following law of the exponent, the positive exponent can be written as,

5³ = 5 x 5 x 5 = 125

Similarly, the negative exponent is written as,

5⁻³ = 1/5³

Which can be simplified as,

1/125 = 0.008

Therefore, when we compare these values, the value of positive exponent is greater than the negative exponent.

Thus, defines that the value of positive and negative exponent are not same.

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Answer: .01 fluid ounces.

Step-by-step explanation:

1,000 drops is 1 FL

100 drops is .1 FL

10 drops is .01 FL

Answer: 60 pages

Step-by-step explanation: 24 pages time 2 would be 48 pages, which is 80% of the pages. Since 12 pages is 20%, you would add 12 pages, which equals 60 pages.

The solution with a pH of 3.3 has a hydronium ion of 0.000501

The pH of a solution is a measure of hydrogen ion concentration, which in turn is a measure of its acidity. Pure water dissociates slightly into equal concentrations of hydrogen and hydroxyl (OH−) ions.

Applying the formula of pH which is given as

pH = -log[H₃O⁺]

But the fruit juice has a pH = 3.3

3.3 = -log[H₃O⁺]

This becomes 10⁻³.³

[H₃O⁺] = 0.000501

The concentration of hydronium ion is 0.000501

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Answer:

EDC = 56 degrees

Step-by-step explanation:

triangle OED is isosceles : base angles are congruent

2 * EDC + 68 = 180

2 * EDC = 180 - 68

2 * EDC = 112

2/2 EDC = 112/2

EDC = 56 degrees

Step-by-step explanation:

Triangle DOE is isosceles. So OED and ODE has same angle.

Total angle for isosceles triangle is 180.

ODE + OED = 180 - 68 = 112

OED = ODE = 112 /2 = 56

Answer: PEMDAS

Parenthesis exponents multiplication Division addition subtraction

Step-by-step explanation:

solve (x+1) first then after just follow pemdas  

Answer:

9

Step-by-step explanation:

5 - 4 + 7 + 1 = 9/1 = 9

Answer:

Step-by-step explanation:

This is about the LCM of the numbers 20 and 36.

First find the prime factors of both numbers:

Now find the LCM:

They will both inspect every 180 cartons.

Answer:

They will both inspect every 180 cartons.

Step-by-step explanation:

Firstly you could find the LCM of 20 and 36.

Multiples of 20 are: 20, 40, 60, 80, 100, 120, 140, 180, etc...

Multiples of 36 are: 36, 72, 108, 144, 180, 216, 252, 288, etc...

Therefore 180 is the answer, all they were asking was what was the LCM. Hope this helped you !!

The compound inequality is $176.40 ≤ t ≤ $352.80 if a construction worker earns an average bi-weekly net pay of $1,764.00 option (A) Is correct.

It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.

It is given that:

A construction worker earns an average bi-weekly net pay of $1,764.00.

= 10% of 1764

= (10/100)1764

= $176.4

= 20% of 1764

= (20/100)1764

= $352.8

Inequality will be: $176.40 ≤ t ≤ $352.80

Thus, the compound inequality is $176.40 ≤ t ≤ $352.80 if a construction worker earns an average bi-weekly net pay of $1,764.00 option (A) Is correct.

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Answer:

$382.20 ≤ t ≤ $764.40

Step-by-step explanation:

Hello, so first we would need to convert bi-weekly pay to monthly income.

First we would times $1,764.00 by 26

1764.00 × 26 = 45864

Then we would divide 45864 by 12

45864 ÷ 12 = 3822.

Then we calculate how much the worker can spend  if their monthly budget for food is in between 10% and 20%

3822 ×  10% = 382.20

3822 × 20% = 764.40

So, we can see the correct answer is $382.20 ≤ t ≤ $764.40.

The coordinates of the vertices of the points A and B are;

A(9, 7), B(15, 9)

A point on the coordinate plane is described by a pair of points known as an ordered pair.

The coordinates of the vertices of the identical rectangles are; (3, 5), (9, 5), (9, 9)

The length of (9 5) from A is the same as the length from (9, 9) to A.

The coordinate of the point A is therefore;

x-coordinate = 9

y-coordinate = 5 + (9 - 5)/2 = 7

The coordinate of point A is (9, 7)

The length of the sides of the rectangle are;

Length = 9 - 3 = 6

Width = 9 - 7 = 2

The coordinates of the point B are;

x-coordinate = 9 + 6 = 15

y-coordinate = 9

The coordinates of the point B is (15, 9)

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