A) The second equation is 2x - 4y +20=0, this system has no solutions.
B) The second equation is x-2y-11=0, this system has infinite number of solutions.
What is meant by an equation?An equation is a mathematical formula that expresses the equality of two expressions by connecting them with the equals sign =. The term equation and its cognates in various languages may have subtle changes in meaning.
Solving an equation with variables includes determining which variables' values result in equality. The variables for which the equation must be solved are also known as unknowns, and the unknown values that satisfy the equality are known as equation solutions. There are two sorts of equations: identities and conditional equations. An identity holds true for all variable values.
Given equation is,
2x - 4y = 22
A) Let the second equation be
2x - 4y +20=0
∴a₁/a₂=1
b₁/b₂=1
c₁/c₂=-11/10
Therefore, a₁/a₂=b₁/b₂≠c₁/c₂
Hence, the system has no solution.
B) Let the second equation be,
x-2y-11-0
Therefore, a₁/a₂=b₁/b₂=c₁/c₂=2/1
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What is the answer to this question?
7x - 3 > 24 can be described as an inequality.
What is an expression and inequality?An algebraic expression consists of unknown variables, numbers and arithmetic operators. It does not contain any equality or inequality symbols.
Variables are number represented with a letter in an expression. Numbers includes 1, 2, 3 etc. Basic operators are addition, subtraction, multiplication and division.
An inequality compares two values, showing if one is less than, greater than, or simply not equal to another value.
For example x > y.
Therefore, we can denote 15x -10 as an expression and 7x - 3 > 24 is denoted as an inequality.
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graph the circle (x-3)^2+(y+3)^2=36
The center of the circle is (3,-3) and the radius is 6 , the graph is drawn below .
In the question ,
the equation of the circle is given as
(x-3)²+(y+3)² = 36 ,
we know that the general equation of the circle is
(x - h)² + (y - k)² = r²
where , the center is (h,k) and the radius is r .
So , on comparing the given equation with general equation of the circle , we get
h = 3 and k = -3
and r² = 36
So, r = 6 .
the center is (h,k) = (3,-3)
and the radius is 6 .
the graph of the circle (x-3)²+(y+3)² = 36 is shown below .
Therefore , The center of the circle is (3,-3) and the radius is 6 .
The given question is incomplete , the complete question is
Graph the circle (x-3)²+(y+3)² = 36 and find the radius and center of the circle ?
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At TechMasters Inc., 80% of employees’ computers have been updated to a new operating system. The company plans to update an additional 25 computers, at which point 85% of employees’ computers will have been updated. After this point, how many employees’ computers remain to be updated to the new operating system? (Note: assume each employee uses only a single computer, and that no computer belongs to more than one employee.)
The percentage is the measure of the portion of a quantity present in the whole. The remaining computers are 75.
What is Percentage ?
Percentage of quantity is proportional to its portion or fraction in a whole.
To convert the percentage into fraction divide the percentage value by 100.
Suppose the total number of employee's computer be x.
Then, as per the question after adding 25 more computers, the following equation can be written,
85% of x = 80% of x + 25
=> 85x/100 = 80x/100 + 25
=> 85x/100 - 80x/100 = 25
=> 5x/100 = 25
=> x = 500.
The remaining computers are given as
15% of x = 15/100 × 500
= 75
Hence, the number of remaining employee's computer after adding 25 more computers are 750.
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what is the y intercept of this graph?
please help me out y'all I need this quick
Write an equation of the line that pass though the point (-3,-7) and has a slope of 2
Answer: 2 abd the answer is that
Step-by-step explanation:
8k^4 -3k^2 multiplied by 5k^2
Answer: 40k⁶-15k⁴
Step-by-step explanation:
[tex](8k^4-3k^2)(5k^2)=\\\\8k^4(5k^2)-3k^2(5k^2)=\\\\8(5)(k^{4+2})-3(5)(k^{2+2})=\\\\40k^6-15k^4[/tex]
Result of [tex]8k^{4} -3k^{2}[/tex] multiplied by [tex]5k^{2}[/tex] is [tex]40k^{6}-15 k^{4}[/tex]
Algebra and Exponent
To answer this question you need to know about algebra and exponent rule.
[tex]8k^{4} -3k^{2}[/tex] multiplied by [tex]5k^{2}[/tex]
It means the operation will become:
[tex]5k^{2} (8k^{4} -3k^{2} )=[/tex]
First, [tex]8k^{4} -3k^{2}[/tex] can't be calculate because of different variable. Even though they both use the letters '[tex]k[/tex]', [tex]k^{4}[/tex] dan [tex]k^{2}[/tex] cannot be added because they have different powers. In algebraic addition, addition can only be done on the same variables and which have the same power.Because [tex]8k^{4} -3k^{2}[/tex] can not be calculated, then we directly calculate the multiplication [tex]5k^{2} (8k^{4} -3k^{2} )[/tex]The way to calculate algebraic multiplication with 2 or more variables is the way I call 'rainbow'.
[tex]5k^{2} (8k^{4} -3k^{2} )=[/tex]
[tex]5k^{2}[/tex] multiplied by [tex]8k^{4}[/tex], [tex]5k^{2}[/tex] multiplied by [tex]-3k^{2}[/tex] first, then the two are added.
Let's multiply one by one first[tex](5k^{2}) (8k^{4} )=[/tex]
The way to multiply this is by: numbers multiplied by numbers and letters multiplied by letters
[tex]=5k^{2} (8k^{4} -3k^{2} )\\=((5)(8))((k^{2} )(k^{4} ))\\=40((k^{2} )(k^{4} )[/tex]
Then how to multiply the letters, this uses the rule of exponents. If there are 2 same variables are multiplied, then the result is a variable with the power of the sum of the two powers.
[tex]a^{m} a^{n} =a^{m+n}[/tex]
Which means,
[tex]k^{2}k^{4} =k^{6}[/tex]
Then,
[tex]=5k^{2} (8k^{4} -3k^{2} )\\=((5)(8))((k^{2} )(k^{4} ))\\=40((k^{2} )(k^{4} )\\=40k^{6}[/tex]
Also same with above,
[tex]=(5k^{2} )(-3k^{2} )\\=((5)(-3))((k^{2} )(k^{2} )\\=-15k^{4}[/tex]
Add the result of two operation above[tex]=5k^{2} (8k^{4} -3k^{2} )\\=((5k^{2})(8k^{4})+((5k^{2})(-3k^{2})\\=(40k^{6})+(-15k^{4} )\\=40k^{6}-15k^{4}[/tex]
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I NEED THIS ASAP PLEASE
A chess board is made using the ratio of square length to king's height, 2.5 inches to 4.5 inches. If a chess board is made with a king's height of 2.25 inches, what is the length of the square?
A: 0.75 inch
B: 1.25 inches
C: 2.25 inches
D: 4.75 inches
Answer: B
Step-by-step explanation:
2.5/4.5 = x/2.25
x = 1.25 in
∠A and \angle B∠B are upplementary angle. If \text{m}\angle A=(7x-12)^{\circ}m∠A=(7x−12)
∘
and \text{m}\angle B=(7x-18)^{\circ}m∠B=(7x−18)
∘
, then find the meaure of \angle A∠A
If the angle A and angle B are supplementary then the measure of angle A is = 93° .
In the question ,
it is given that
the two angles A and B are supplementary ,
we know that when two angles are supplementary their sum is 180° .
So , the sum of measure of angle A and angle B will be 180° ,
that is ,
given that measure of angle A = (7x - 12)°
measure of angle B = (7x - 18)°
So , according to the question ,
(7x - 12) + (7x - 18) = 180°
7x + 7x - 12 - 18 = 180
14x - 30 = 180
14x = 180 + 30
14x = 210
x = 210/14
x = 15
So , the measure of angle A = (7*15 - 12) = 105 - 12 = 93°
Therefore , If the angle A and angle B are supplementary then the measure of angle A is = 93° .
The given question is incomplete , the complete question is
Angle A and angle B are supplementary angle. If angle A = (7x - 12)° and angle B = (7x - 18)° , then find the measure of angle A ?
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Enter the polynomial function with the least degree and a leading coefficient of 1 that has the given
zeros.
3(multiplicity 2), and 3i
The polynomial function with the lowest degree with a leading coefficient of 1 and zeros is 1, -1(multiplicity 3), and 3i is [x³+(2-3i)x²-(3+6i)x+9i].
What is a polynomial function?In an equation such as the quadratic equation, cubic equation, etc., a polynomial function is a function that only uses non-negative integer powers or only positive integer exponents of a variable. For instance, the polynomial 2x+5 has an exponent of 1.So, the equation of the curve with a leading coefficient of 1 or the polynomial function with a leading coefficient of 1 f(x) can be expressed as (x-a)* (x-b)* if a, b, and c are the zeros of a polynomial (x-c).
Here, the zeros are as follows: 1, -3, and 3i.The polynomial function f(x) is therefore (x-1)* (x-(-3))* (x-3i).Now, calculate as follows:
= (x-1) × (x+3) × (x-3i)(x² + 2x - 3) × (x - 3i)= x³ + 2x² - 3x - 3ix² - 6ix + 9i= x³ + (2 - 3i)x² - (3 + 6i)x + 9iTherefore, the polynomial function with the lowest degree with a leading coefficient of 1 and zeros is 1, -1(multiplicity 3), and 3i is [x³+(2-3i)x²-(3+6i)x+9i].
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What is the solution of 9|2x – 1| + 4 < 49?
x < –2 or x > 3
x < –3 or x > –2
–2 < x < 3
–3 < x < –2
please help me
Answer:
-2<x<3
Step-by-step explanation:
I have attached the work required to solve this problem as well as a pretty good explanation to each step.
Area of a Triangle Practice Find the area of each
Select ALL the correct answers.
Which equations could be used to find the value of 9,360 + 15?
(9,000 + 300+60) ÷ 15 = 624
(9,300 15) + (60 ÷ 5) = 624
(9,000 + 10) + (360 ÷ 5) = 642
(9,000 15) + (300 ÷ 5) + (60 = 10)
(9,000 15) + (300÷10) + (60 ÷ 5)
÷
(9,000 15) + (360 = 15)
÷
624
-
642
= 642
Answer:
the first, second and last option
Step-by-step explanation:
help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The amount owed by the debtor is $10865
How to determine the amount owed in six years?The given parameters about the compound interest are
Principal Amount, P = $5300
Interest Rate, R = 8%
Time, t = 6 years
To calculate the amount owed, we make use of the following formula
A = P + CI
Where
Compound interest, CI = P(1 + R)^t - P
So, the equation becomes
A = P + P(1 + R)^t - P
Evaluate the like terms
A = P(1 + R)^t
In this question, the formula is given as
A = P(1 + r/n)^nt
Where
n = 12, i.e compounded monthly
Substitute the known values in the above equation
A = 5300 * (1 + 8%/12)^(6*12)
Express 8% as decimal
A = 5300 * (1 + 0.08/12)^(6*12)
Evaluate the sum
A = 5300 * (1.01)^(6*12)
Evaluate the exponent
A = 5300 * 2.05
Evaluate the product
A = 10865
Hence, the value of the amount after 6 years is $10865
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Solve the following equation by completing the square.
4x²-16x + 8 = 0
A. x = 2 + √2 or x = -2 + √2
B. x = 2 + √2 or x = 2-√2
C. x = -2 + √2 or x = -2-√2
D. x = 4 or x = 0
Answer:
B ) x = 2 + √2 or x = 2-√2
Step-by-step explanation:
See attachment...
Hope this helps! :)
-26 + 15
Integers and rational numbers
The value of the expression given as 26 + 15 is -11.
What is an expression?Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations.
As an illustration, the expression x + y has the terms x and y with an addition operator between them.
In this case, the value of -26 + 15 will be:
= -26 + 15
= -11
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a landscaper is designing a rectangular garden. the length of the garden is to be 555 feet longer than the width. if the area of the garden will be 104104104 square feet, what will be the length, in feet, of the garden?
Area of rectangle is the product of Length and Width, so by using this the length of garden will be 13 feet.
What exactly is a rectangle?The parallel sides of a rectangle are equal to one another, and each of its four vertices is 90 degrees, making it a type of quadrilateral. As a result, it is also referred to as an equiangular quadrilateral. The term "parallelogram" can also be used to describe a rectangle because the opposing sides are equal and parallel.
suppose x = width of rectangular garden.
length of the garden is 5 feet longer than width.
now, x+5 = Length
Area of rectangle L X B = [tex]x X(x+5)[/tex]
Garden's area is = 104 square feet
Then,
[tex]x X (x +5) = 104\\x^{2} + 5x - 104=0\\(x-8)(x+13)=0\\x=8,-13[/tex]
Now, width ==8
Therefore, Length = x+5= 13
13feet is the length of the garden.
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(-3,0) reflected over the y a-xis
Answer:
( 3 , 0 )
Step-by-step explanation:
When the reflection is over the y-axis , the y-coordinate is the same
and x-coordinate changes its Sign
So for ( -3 , 0) is reflected over y-axis
Then x-coordinate = 3
Then y-coordinate =0
So the new point = ( 3 , 0 )
A manufacturing company has designed a new test of mechanical aptitude for its machinists. Scores on this test approximate a Normal distribution with p=400 and 60. What score would a machinist need in order to be in the top 10% of all machinists who would take this test?
The machinist would score 476.92 in order to be in the top 10% of all machinists who would take this test using the normal distribution.
What is Normal Distribution?
The Normal Distribution, often known as the Gaussian Distribution, is the most important continuous probability distribution in probability theory and statistics. It is also referred to as a bell curve on occasion. In every physical science and in economics, a huge number of random variables are either closely or precisely described by the normal distribution. Additionally, it may be used to roughly represent various probability distributions, reinforcing the notion that the term "normal" refers to the most common distribution.
Let X denotes the scores.
In the question, It is given that:
Normal distribution with p=400 and 60.
[tex]X \sim N(\mu=400, \sigma=60)\\$$$\frac{X-\mu}{\sigma}(=Z) \sim N(0,1)$\\i.e. $P(Z \leq z)=\Phi(z)$[/tex]
Let 'a' be the score to be in the top 10% of all machinists.
[tex]\begin{aligned}&P(X \leq a)=1-0.10=0.90 \\&\text { or, } P\left(\frac{X-\mu}{\sigma} \leq \frac{a-400}{60}\right)=0.90 \\&\text { or, } \Phi\left(\frac{a-400}{60}\right)=0.90=\Phi(1.282) \\&\text { or, } \frac{a-400}{60}=1.282 \\&\text { or, } \mathbf{a}=\mathbf{4 7 6 . 9 2}\end{aligned}[/tex]
So,
The score a machinist need in order to be in the top 10% is 476.92.
Hence,
a machinist would score 476.92 in order to be in the top 10% of all machinists who would take this test.
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help me please i cant today with anything (my ADHD partying in my body taking brain cells)
Answer: [tex]\frac{8.1}{5}[/tex]
Step-by-step explanation:
First of all, I multiplied both sides by 5.
8 x 5 is 40, and 13 x 5 is 65.
This gives 65/40
Now, I divide 65 and 40 by 8.
65/8 is 8.1
and 40 divided by 8 is 5.
So the answer is 8.1/5
(04.04 MC)
Which of the following is a linear function? (1 point)
O y = 3x²
Oy
y =
1
3x
Oy=x³+5
○ 3x-y-1
3
The linear function is 2/3 x=y-1. Therefore, option D is the correct answer.
What is linear function?A linear function is a function that represents a straight line on the coordinate plane. The standard form of a linear function is y = mx + b.
Here, 'm' is the slope of the line, 'b' is the y-intercept of the line, 'x' is the independent variable and 'y' (or f(x)) is the dependent variable.
Option A:
In the function y=3x², the highest degree is 2, so it is quadratic function.
Option B:
The function y=1/3x is not a linear function.
Option C:
In the function y=x³+5, the highest degree is 3, so it is cubic function.
Option D:
In the function 2/3 x=y-1, the highest degree is 1, so it is linear function.
The linear function is 2/3 x=y-1. Therefore, option D is the correct answer.
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Write an expression to describe the sequence below. Use n to represent the position of a term in the sequence, where n = 1 for the first term.
–80, –79, –78, –77, ...
The expression is an arithmetic progression and the solution is
aₙ = a + ( n - 1 ) d
where a = 1
d = -1
n = 82
What is Arithmetic Progression?
An arithmetic progression is a sequence of numbers in which each term is derived from the preceding term by adding or subtracting a fixed number called the common difference "d"
The general form of an Arithmetic Progression is a, a + d, a + 2d, a + 3d and so on. Thus nth term of an AP series is Tn = a + (n - 1) d, where Tₙ = nth term and a = first term. Here d = common difference = Tₙ - Tₙ₋₁
Sum of first n terms of an AP: Sₙ = ( n/2 ) [ 2a + ( n- 1 ) d ]
Given data ,
Let the number of terms n = 82
Let the first term of the arithmetic progression be a = 1
Now , the common difference is d = -80 - ( -79 )
= -1
So , the expression for arithmetic progression is :
aₙ = a + ( n - 1 ) d
Substituting the values , we get
a₈₂ = 1 + ( 82 - 1 ) ( -1 )
a₈₂ = 1 + ( -81 )
a₈₂ = -80
And ,
a₈₁ = 1 + ( 81 -1 ) ( -1 )
a₈₁ = 1 + ( - 80 )
a₈₁ = -79
And so on ,
so , the expression is
aₙ = a + ( n - 1 ) d
where n = 82
d = -1
And the first term is a = 1
Hence , The expression is an arithmetic progression and the solution is
aₙ = a + ( n - 1 ) d
where a = 1
d = -1
n = 82
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PLEASE HELP, ill giev brainliest
Write a two-column proof.
Given: Line AB ∥ Line DC, ∠B ≅ ∠D
Prove: Line BC ≅ Line DA
Here is the proof:
1. Length AB = Length DC
2. Angle BAC = Angle ACD (AB is parallel to CD, so the opposite interior angles are equal)
3. AC length = AC length (2 lines coincide)
Principle of Side - Angle - Side
then the two triangles are said to be congruent
So Length BC = Length DA
Congruence is a condition where two flat shapes have the same size and are said to be congruent.
The characteristics of two triangles that are said to be congruent are:
1. When the pairs of corresponding sides are equal in length. Usually called the side-by-side criterion.
2. Two pairs of corresponding sides are equal in length and the angles between them are equal. Commonly referred to as the side-angle-side criterion.
3. Two pairs of congruent angles and the same side lengths. Also known as angle-side-angle
1. If y is directly proportional to x and y = 6 when
x = 2,
(i) express y in terms of x,
(ii) find the value of y when x = 11,
(iii) calculate the value of x when y = 12,
(iv) draw the graph of y against x
After doing proportional we will get:
i) Express y in terms of x : y = kx
ii) The value of y when x = 11 is 33
iii) the value of x when y = 12 is 4
What is proportional?
If the corresponding elements of two sequences of numbers, frequently experimental data, have a constant ratio, known as the coefficient of proportionality as well as proportionality constant, then the two sequences of numbers are proportional as well as directly proportional. If corresponding elements in two sequences have a constant product, also known as the coefficient of proportionality, then the two sequences seem to be inversely proportional. This definition is frequently expanded to include connected variable quantities, also known as variables. Variable has a different meaning in mathematics than it does in everyday language (see variable (mathematics)); such two concepts share the same name due to a shared etymology.
i) y ∝ x
y = kx
when y = 6, x = 2
6 = 2k
k = 3
y = kx
ii) y = 3x
y = 3(11)
y = 33
iii) y = 3x
12 = 3x
x = 4
iv) For the graph:
x 0 1 2
y 0 3 6
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Henry was given a following equation: y=7-2x. He says the rate of change is 7 and the initial value is -2. Is he correct PLEASE HELP
In the given function the rate of change is -2 and the initial value is 7. Therefore, Harry is incorrect.
The given function is y=7-2x.
What is rate of change and initial value of a function?The rate of change, or the slope, is calculated as Δy/Δx , or (y2−y1)/(x2−x1). The slope-intercept equation of a line is y=mx+b , where m is the slope and b is the initial value.
Given that, the rate of change is 7 and the initial value is -2.
In the given function y=7-2x
Here, slope or the rate of change is -2 and the y-intercept or initial value is 7.
In the given function the rate of change is -2 and the initial value is 7. Therefore, Harry is incorrect.
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Which expression can you use that is
equivalent to 5x -2(15-x)?
3x - 30 4x - 30
6x-30 7x-30
(7x-30) is the expression which you can use that is equivalent to 5x -2(15-x).
What is a mathematical equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
For example, 3x – 5 = 16 is an equation. Solving this equation, we get the value of the variable x as x = 7.
Given: [tex]5x-2(15-x)[/tex]
On solving the above equation we get ,
⇒ 5x - 2 (15) + 2 (x)
⇒ 5x - 30 + 2x
⇒ (5x + 2x) - 30
⇒(7x - 30)
Hence, we can say that (7x-30) is the expression which we can use and that is equivalent to 5x -2(15-x).
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Here is a child's wooden block. Calculate the area and perimeter of the shape. Use 3.14 for .
\
a. What is the perimeter of this figure, to the nearest centimeter?
b. What is the area of this figure, to the nearest square centimeter
Answer:
Step-by-step explanation:
a; i
b; i
Question at position 1
Roya paid $48.00 for 8 cartons of orange juice. What is the unit rate per carton of orange juice that Roya paid?
Step-by-step explanation:
The unit rate per carton is 2
Bushels of apples cost $7.95 at farmer's market. How much would 8 bushels of apples cost? Use mental math.
A. $63.60
B. $56.20
C. $63.20
D. $56.60
The 8 bushels of apples cost is $63.60 i.e, option(A.)
What do you mean by Cost ?
The amount or equivalent paid or charged for something.The relation between cost, rate and numberCost (c) : is the total cost of the purchase.
Rate (r) : is the cost of each individual item.
Number (n) : is the number of items you want to purchase.
These are related in the following way:
c = n * r
Given,
Bushels of apples cost = $7.95
8 bushels of apples cost will be = $7.95 * 8
= $63.6 or $63.60
Hence, the 8 bushels of apples cost is $63.60 i.e, option(A.)
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find the value of x and y
Answer:
∴ x = 10.7 (to 3sf), y = 18
Step-by-step explanation:
(3x)° + (4x-15)° = 90° (right angle given) ------ equation (1)
(3x)° + (4x-15)° + (5y)° = 180° (adjacent angles on a straight line) ------ equation (2)
From equation (1),
3x + 4x - 15 = 90
7x = 75
∴ x = 10.7 (to 3sf)
Subtract equation (1) from equation (2):
(3x+4x-15+5y) - (3x+4x-15) = 180 - 90
5y = 90
∴ y = 18
a car manufacturer crash tests a certain model of car and measures the impact force. the test and model in question produce impact forces that are normally distributed with a mean of 303030 metric tons and a standard deviation of 1.51.51, point, 5 metric tons. suppose that the manufacturer tests a random sample of 333 cars and calculates the sample mean impact force. assume that the cars in the sample are independent. what will be the shape of the sampling distribution of the sample mean impact force?
Shape of the distribution of the mean is appropriately normal.
What is sampling distribution ?The sampling distribution for a given population is the frequency distribution of the different outcomes that can occur for a population statistic.
In statistics, the population is the entire pool from which statistical samples are drawn. Population can refer to an entire group of people, things, events, visits, or measurements. Populations can therefore be described as aggregated observations from subjects grouped according to common characteristics.
CalculationFrom the given information
X:- impact force produced
X follows normal distribution with mean 30 and standard deviation of 3
n=3
As we know that when random sample is drawn from normal population then sample mean always follows normal distribution irrespective with sample size.
Shape of the distribution of the mean is appropriately normal.
learn more about sampling distribution here :
brainly.com/question/13501743
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