Answer:
Step-by-step explanation:
To solve this system of two equations with two variables (x and y), we'll use the substitution method. Here's how:
Solve one of the equations for either x or y, in terms of the other variable. Let's solve the first equation, 2x - 5y = 4, for x:
x = (4 + 5y)/2
Substitute the expression for x from step 1 into the second equation, 4x = 8 + 10y:
4(4 + 5y)/2 = 8 + 10y
Simplify the equation from step 2:
8 + 10y = 8 + 10y
Solve for y by subtracting 8 from both sides:
10y = 10y
Divide both sides by 10 to find the value of y:
y = y
Now that we have the value of y, we can substitute it back into the expression for x from step 1:
x = (4 + 5 *y)/2
So the solution to the system of equations is (x, y) = ((4 + 5 *y)/2, y=y).
A true-false quiz contains six questions. In how many ways can a student answer the questions if the student answers two of the questions with "false" and the other four with "true"?
Answer: In each question you have two options, T and F. Then in 6 questions you have 2 options for the first, two for the second, two for the third... At the end you get 2·2·2·2·2·2 = 26 options and 26 = 64.
Step-by-step explanation:
Oliver and Chen both write down a number. Oliver says, my number has 8 hundreds and Chen's number only has 3 hundreds my number must be bigger. Oliver is not correct. explain why
Oliver's number is bigger than that of Chen.
What are hundreds in a number?It is a number equal to 10 times 10.
Given is that Oliver and Chen both write down a number. Oliver says, my number has 8 hundreds and Chen's number only has 3 hundreds, my number must be bigger.
Oliver number can be written as follows -
8 x 10 x 10
Chens number can be written as follows -
3 x 10 x 10
It can be concluded that Oliver's number is bigger than that of Chen.
Therefore, Oliver's number is bigger than that of Chen.
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f(x) = (x-7)³, find f¯¹(x).
The inverse function f-¹(x) as required to be determined from the given function; f(x) = (x-7)³ is; f¯¹(x) = ³√x + 7.
What is the inverse function f-¹(x)?It follows from the task content that the inverse function of the given function; f(x) = (x-7)³ is to be determined.
Therefore, let f(x) = y; so that we have;
y = (x - 7)³
make x the subject so that we have;
³√y = x - 7
x = ³√y + 7
By switching the variables; we have;
y = ³√x + 7
Therefore, the required inverse function; f-¹ as required is; f¯¹(x) = ³√x + 7.
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Find HP
Round to the nearest whole meter
Check the picture below.
Make sure your calculator is in Degree mode.
For his birthday, Tyler's parents gave him $7,000.00 which they put into a savings account that earns 15% interest compounded quarterly. When Tyler started college, he withdrew the entire balance of $26,725.00 and used it to pay for tuition. How long was the money in the account?
The number of years the interest was compounded quarterly is given by the equation b = 9.098 years
What is Compound Interest?Compound interest is interest based on the initial principle plus all prior periods' accumulated interest. The power of compound interest is the ability to generate "interest on interest." Interest can be added at any time, from continuously to daily to annually.
The formula for calculating Compound Interest is
A = P ( 1 + r/n )ⁿᵇ
where A = Final Amount
P = Principal
r = rate of interest
n = number of times interest is applied
b = number of time periods elapsed
Given data ,
Let the amount after b years be A = $ 26,725.00
The number of years be = b
The number of times the interest is applies n = 4 ( quarterly )
Let the principal amount be P = $ 7,000
A = P ( 1 + r/n )ⁿᵇ
Substituting the values in the equation , we get
t = ln ( A/P ) / n [ ln ( 1 + r/n ) ]
t = b = n ( 26,725.00 / 7,000.00 ) / ( 4 × [ ln ( 1 + 0.15/4 ) ] )
On simplifying the equation , we get
b = ln ( 26,725.00 / 7,000.00 ) / ( 4 × [ ln ( 1 + 0.0375 ) ] )
b = ln ( 3.81785714 ) / 4 [ ln ( 1.0375 ) ]
On further simplification , we get
b = 9.098 years
Hence , the number of years the interest was applied is 9 years 1 months
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Determine the value for m in the equation 1.4m = 0.42. HELP ASAP
Answer:
Below
Step-by-step explanation:
1.4 m = .42 divide both sides of the equation by 1.4 to get
m = .3 Done.
Unions, intersections, and complements involving 2 sets
Part A:
[tex]B\cap D[/tex] is asking for what the sets B and D have in common:
[tex]B\cap D = \{4\}[/tex]
since B and D only have 4 in common.
Now [tex](B \cap D)'[/tex] is asking for all of the things in the universal set [tex]U[/tex] that are not in [tex]B\cap D[/tex]. That's what the little tick mark on the right side means.
[tex](B \cap D)' = \{2, 3, 6, 7\}[/tex]
Part B:
[tex]B' = \{2, 3, 7\}[/tex] since those are the things not in B.
[tex]D=\{3, 4\}[/tex]
[tex]B'\cup D[/tex] is asking for all the things in either [tex]B'[/tex] or [tex]D[/tex].
[tex]B'\cup D = \{2, 3, 4, 7\}[/tex]
(We don't need to list 3 twice, even though it was in both sets. )
I will give brainliest and ratings if you get this correct
The derivative formula for the division of two functions is equal to d [θ(x)] / dx = [g(x) · f'(x) - f(x) · g'(x)] / [g(x)]², where θ(x) = f(x) / g(x).
How to proof the derivative of the division of two function
In this problem we need to derive the formula for the derivative of the division of two functions, that is, the expression θ(x) = f(x) / g(x). First, we write the definition of the derivative for the given expression:
[tex]\frac{d}{dx} [\theta (x)] = \lim_{h \to 0} \frac{\theta(x + h) - \theta (x)}{h}[/tex]
Second, substitute and expand the expression by algebra properties:
[tex]\frac{d}{dx} [\theta (x)] = \lim_{h \to 0} \frac{\frac{f(x + h)}{g(x + h)} - \frac{f(x)}{g(x)} }{h}[/tex]
[tex]\frac{d}{dx}[\theta (x)] = \lim_{h \to 0} \frac{f(x + h) \cdot g(x) - f(x) \cdot g(x + h)}{h\cdot g(x + h)\cdot g(x)}[/tex]
Third, expand and simplify the expression one more time by algebra properties and limit properties:
[tex]\frac{d}{dx} [\theta (x)] = \lim_{h \to 0} \frac{f(x + h) \cdot g(x) - f(x) \cdot g(x) + g(x) \cdot f(x) -f(x) \cdot g(x + h)}{h \cdot g(x + h) \cdot g(x)}[/tex]
[tex]\frac{d}{dx}[\theta (x)] = \lim_{h \to 0} g(x) \cdot \frac{f(x + h) - f(x)}{h\cdot g(x+h)\cdot g(x)} - \lim_{h \to 0} f(x) \cdot \frac{g(x + h) - g(x)}{h\cdot g(x+h)\cdot g(x)}[/tex]
[tex]\frac{d}{dx}[\theta (x)] = \lim_{h \to 0} \frac{g(x)}{g(x + h) \cdot g(x)} \cdot \lim_{h \to 0} \frac{f(x + h) - f(x)}{h} - \lim_{h \to 0} \frac{f(x)}{g(x+ h) \cdot g(x)} \cdot \lim_{h \to 0} \cdot \frac{g(x + h) - g(x)}{h}[/tex]
Fourth, simplify the resulting expression by evaluating the limits:
d [θ(x)] / dx = [g(x) / [g(x)]²] · f'(x) - [f(x) / [g(x)]²] · g'(x)
d [θ(x)] / dx = [g(x) · f'(x) - f(x) · g'(x)] / [g(x)]²
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The Tasty as Pi Bakery sells circular pies with a $9$ inch diameter. The bakery offers two different sizes of pie slices: small and large.
Cutting a pie into $5$ equal pieces produces $5$ large slices. The small slices measure $27$ degrees fewer than the large slice.
How many equal pieces should they cut a whole pie into so that each piece is a small slice?
A pie has 360 degrees, so a pie cut into 5 equal pieces produces 5 slices that each measure 360 / 5 = 72 degrees.
A small slice measures 27 degrees fewer than a large slice, so it measures 72 - 27 = 45 degrees.
To find the number of pieces a pie should be cut into so that each piece is a small slice, we need to determine how many degrees each slice measures. To do this, we divide 360 by the number of pieces:
360 / n = 45
Solving for n, we get:
n = 360 / 45 = 8
So, the Tasty as Pi Bakery should cut a whole pie into 8 equal pieces so that each piece is a small slice.
The world population is 2000 was approximately 6.08 billion (6,080,000,000). The annual rate of increase is 1.26%.
a. What is the world population in 2010?
b. What is the population in 2023?
Answer:
6.89 billion for year 2010
7.15 billion for year 2023
Step-by-step explanation:
f(x) = [tex]a(1 + r) ^{x}[/tex]
f(x) = [tex]6.08(1+ .0126)^{10}[/tex]
f(x) = 6.89 Rounded to 2 places
f(x) = [tex]6.08(1+ .0126)^{13}[/tex]
f(x) = 7.15 Rounded to 2 places
David's phone has about 10,000 songs. The distribution of play time for these songs is heavily skewed to the right with a mean of 225 seconds and a standard deviation of 60 seconds. Suppose we choose an SRS of 10 songs from this population and calculate the mean play time i of these songs.
a) Calculate the mean and standard deviation of the sampling distribution.
b) Interpret the standard deviation from part (a)
On solving the provided question, we can say that The following are the mean and standard deviation of the sample distribution of x: Average: 225 sec. 19 second standard deviation.
What is standard deviation?Standard deviation is a statistic that expresses the variability οr variance of a grοup of numbers. While a high standard deviation suggests that the values are mοre dispersed, a low standard deviation suggests that the values tend tο be closer to the established mean.
A measure of hοw dispersed the data are frοm the mean is the standard deviation (οr ). When the standard deviation is lοw, the data tend to be grouped around the mean, and when it is large, the data are mοre dispersed. The average variability of the data set is measured as standard deviation. It reveals the average deviation of each scοre from the mean.
The median matches the median οf the population.
The pοpulation standard deviation is divided by the square root of the sample size tο produce the standard deviation.
The following are the criteria fοr this issue:
average population of 225 seconds.
60 second population standard deviatiοn.
10 second sample size.
Consequently, the following is the standard deviation fοr the sample distributiοn of x:
19 seconds are equal to 60/√(10).
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Write out all functions ????:{1,2,3,4}→{????,????} (using two-line notation). How many functions are there? How many are surjective? How many are injective? How many are bijective?
Since the domain has 4 elements and the range has 2 elements, each element in the domain can be mapped to one of the two elements in the range. Thus, there are a total of [tex]$2^4 = 16$[/tex] functions from the domain to the range.
What is functions ?
In mathematics, a function is a relation between a set of inputs (called the domain) and a set of possible outputs (called the codomain or range) with the property that each input is related to exactly one output. Functions can be represented in many ways, including algebraic expressions, graphs, tables, or verbal descriptions.
Functions are widely used in various fields of mathematics, science, and engineering to model and analyse real-world phenomena, and to make predictions or decisions based on data.
There are 4 elements in the domain and an empty set in the codomain.
Using two-line notation, the functions are:
{1→∅, 2→∅, 3→∅, 4→∅}{1→∅, 2→∅, 3→∅, 4→∅}{1→∅, 2→∅, 3→∅, 4→∅}{1→∅, 2→∅, 3→∅, 4→∅}There is only one possible image for each element in the domain, which means that there is only one function.
Since there is only one function, it is both surjective and injective. Therefore, there is only one bijective function.
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A plane leaves the ground with an elevation angle of 6 degrees. The plane travels 10 miles horizontally. How high the plane is at that time?
Responses
A. 1.05
B 5.10
C 9.95
D 10.06
E 95.14
F 95.67
Answer:
Below
Step-by-step explanation:
If you draw this diagram you will see a right triangle with legs = height
and 10 miles
for the 6 degree angle ( in the right triangle)
tan ( 6) = opposite leg / adjacent leg
tan (6) = height / 10
or 10 * tan 6 = height ( in miles)
1.05 miles high
Put a decimal point in the number 26583 so that the 5 has a value of
100
50
The number as decimal is 26583.0
How to rewrite the number as decimalFrom the question, we have the following parameters that can be used in our computation:
Number = 26583
Also, we have the required value of 5 to be
Required = 100
Using the above as a guide, we have the following:
The number 5 must have a value of 100 in the new number i.e. 500
So, we have
Number = 26583
Rewrite as
Number = 26500 + 83
This means that we add 5 at the end
So, we have
Number = 26583.0
Hence, the new number is 26583.0
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Line CD passes through points (0, 2) and (4, 6). Which equation represents line CD?
Oy=2x-2
Oy = 2x + 2
Oy=x+2
Oy=x-2
The required equation of the line representing line CD is y = x + 2. Option C is correct.
The equation of the line passing through two points is given by the equation,
y - y₁ = (y₂ - y₁) / (x₂ - x₁) (x - x₁) - - - -- -(1)
Here,
Line CD passes through points (0, 2) and (4, 6)
Let (0, 2) and (4, 6) equal to (x₁, y₁) and (x₂, y₂) respectively.
Substitute this point in equation 1 to get the equation of the line representing CD,
So,
y - 2 = (6 - 2)/(4-0) (x - 0)
y = x + 2
Thus, the required equation of the line representing line CD is y = x + 2. Option C is correct.
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What is 7/8 of sixteen times a half of 30
7/8 of sixteen times a half of 30 is 210.
What is a PEMDAS rule?
PEMDAS is an acronym that stands for the order of operations in mathematics: Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
To calculate this, we can follow the order of operations, which is also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction):
Start with the expression inside the parentheses: half of 30 is 15.
Multiply 16 by 15: 16 times 15 is 240.
Find 7/8 of 240:
7/8 of 240 = (7/8) x 240
= 210
Hence, 7/8 of sixteen times a half of 30 is 210.
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Find all real numbers z for which the equation (z-5)x^2-zx+5=0 has exactly one real solution.
By making the discriminant equal to zero, we can see that the quadratic equation has one real solution only for z = 10.
For which values of z the quadratic equation has only one real solution?For a general quadratic equation:
a*x^2 + b*x + c = 0
We define the discriminant as:
D = b^2 - 4ac
The quadratic equation will have only one real solution only if the discriminant is equal to zero.
Here the quadratic is:
(z - 5)*x^2 - z*x + 5 = 0
Then the discriminant is:
(-z)^2 - 4*5*(z - 5)
And that must be equal to zero, then we need to solve:
z^2 - 20*(z - 5) = 0
z^2 - 20z + 100 = 0
Using the quadratic formula we will get:
[tex]z = \frac{20 \pm \sqrt{(-20)^2 - 4*1*100} }{2} \\\\z = \frac{20 \pm 0}{2} \\\\z = 10[/tex]
So the quadratic equation has one real solution only for z = 10.
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what does the term 52s represents?
52s represents the cost for the snowboard times s days.
What is an expression ?
An expression consists of one or more numbers or variables along with one more operation.
Given :
expression : 52s + 10
Since it represents , total cost to rent a snow board for s days plus the fee for the helmet
Therefore , 52 is the cost of the snowboard rental per day.
s represents the day(s) that the equipment is rented out.
Hence , 52s represents the cost for the snowboard times s days.
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Given question is incomplete , the complete question is given below:
At the ski shack customers can rent skis snowboards boots and poles by the day. josh rents a snowboard and a helmet. The expression 52s + 10 represents the toatak cost to rent a snow board for s days plus the fee for the helmet what dose the term 52s represent
-0.2x+3 / 2 = -0.6 ??
Answer:
Step-by-step explanation:
-0.2x+3 / 2 = -0.6 =>
-0.2x = -(3/2) - 0.6 => (facotorize out -1)
x = ((3/2)-0.6)/0.2 =>
x = 4.5
what happend if you do rise over run
PLEASE GIVE BRAINLIEST
thank you and have a good day :)
Answer:
You figure out the slope
Step-by-step explanation:
Rise/Run is a formula that calculates the slope. This determines the direction of the line and how steep it is.
Answer:
its a math term yw my boy
Step-by-step explanation:
Joseph selects a card from a standard deck of 52 cards and then replaces it afterwards. He decides to record the total number of red cards that he selects and calculates the proportion of red cards that he has selected so far after each pick. He then constructs a graph to visualize his results. Which of the following statements is FALSE?O The theoretical probability for selecting a red card in each pick is 0.5. O For a given number of selections, we can use Joseph's graph to find the number of diamonds that he has picked so far. O This is an example of the law of large numbers. O The relative frequency of selecting a red card changes with the increase in number of selections.
He then constructs a graph to visualize his results, For a given number of selections, we can use Joseph's graph to find the number of diamonds that he has picked so far is FALSE.
Probability refers to potential. A arbitrary event's circumstance is the subject of this area of mathematics. The range of the value is 0 to 1. Mathematics has incorporated probability to read the liability of colorful events. The degree to which commodity is likely to be is principally what probability means.
You will understand the potential outcomes for a random experiment using this fundamental theory of probability, which is also applied to the probability distribution.
We are only interested in finding red card so we can't differentiate between diamond or hearts at any time. Hence,
The false statement is:
For a given number of selections, we can use Josephs graph to find the number of diamonds that he has picked so far.
Option B is correct.
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Analyze the function f(x) = - tan 4x. Include:
- Domain and range
- Period
- Two Vertical Asymptotes
For the function f(x) = -tan 4x,
Domain = π[(2n+1)/8] < x < π[(2n+3)/8] Range = set of all real numbers The period = π /4Two vertical asymptotes = π/8 and -π/8Given the function
f(x) = -tan 4x
The domain of the function is the set of all possible inputs of the function
The range is set of all possible outputs of the function
Here the function is
f(x) = -tan 4x
Domain of the function will be
π[(2n+1)/8] < x < π[(2n+3)/8]
The range of the given function is set of all real numbers
The period = π /4
Two vertical asymptotes are π/8 and -π/8
Therefore, the domain, range period and the two vertical asymptotes of the function has been found
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A newspaper advertisement contains the following information. Busy Body Fitness Center Inventory Reduction Blowout! Sale prices is 20% off original price! Sale Price Upright bike $720. In dollars, what was the original price of the upright bike? Write your answer on the line below.
The original price of the upright bike is $3,600.
What is the original price of the upright bike?
Percentage is the fraction of an amount that is usually expressed as a number out of hundred. The sign that is used to represent percentages is %. Percentage is a measure of frequency.
Original price of the upright bike = sales price / percent discount
= $720 / (20/100)
$720 / 0.2
= $3,600
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A
B
C
D
Pick a letter
Answer: D
Step-by-step explanation:
1 in.=1488 milesx5=7440 miles.
Area= pi x r^2
=pi x (7440)^2 or option D.
Hope this helps :)
Which is stronger? 3 scoops of coffee for 4 cups of water, or 4 scoops of coffee for 6 cups of water? Show Your Work.
The stronger one is 4 scoops of coffee for 6 cups of water.
How strong coffee is made?Strong coffee is prepared by employing a greater coffee grounds-to-water ratio. Typically, 2 teaspoons of coffee grinds are used for every 6 ounces of water in a strong cup of coffee. To make a truly strong cup of coffee, use 3 teaspoons of ground coffee for every 6 ounces of water. If you use a French press, you need also increase the steeping time.
In the given question, it is stronger to use 4 scoops of coffee for 6 glasses of water. This is due to the fact that there are more coffee grounds in relation to the amount of water, resulting in a higher concentration of coffee in the combination.
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Consider the two triangles. How can the triangles be proven similar by the SSS similarity theorem?
To prove that ΔUVW and ΔXYZ are similar by the SSS Similarity Theorem: a. show that the ratios UV/XY, WU/ZX, and WV/ZY are equivalent.
What is the SSS Similarity Theorem?
The SSS Similarity Theorem states that two triangles are similar if the ratio of all three pairs of corresponding sides of two triangles are equivalent.
Given ΔUVW and ΔXYZ, where:
UV corresponds with XY, thus UV/XY = 50/40 = 1.25
WU corresponds with ZX, thus WU/ZX = 40/32 = 1.25
WV corresponds with ZY, thus WV/ZY = 60/48 = 1.25
Since all the ratio of all three corresponding sides of both triangles are equivalent, therefore both triangles can be proven to be similar by the SSS Similarity Theorem.
Therefore, to prove that ΔUVW and ΔXYZ are similar by the SSS Similarity Theorem: a. show that the ratios UV/XY, WU/ZX, and WV/ZY are equivalent.
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The number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate parameter of 5.8% per hour. How many hours does it take for the size of the sample to double?
It will take 5.189 hours to get doubled the size of Sample.
What is Exponential Function?A relation of the form y = [tex]a^x[/tex], with the independent variable x ranging over the entire real number line as the exponent of a positive number a.
Given:
Growth rate = 5.8%
The continuous exponential growth model for populations is given by:
P(t)= [tex]P_0 e^{rt[/tex]
So, r= 5.8%
r = 0.058
Now, the time taken to double the sample then P(t) = 2P(0).
So, P(t)= [tex]P_0 e^{0.058t[/tex]
2P(0) = [tex]P_0 e^{0.058t[/tex]
[tex]e^{0.058t[/tex] = 2
Taking log on both side
log [tex]e^{0.058t[/tex] = log 2
0.058 t = 0.301
t= 0.301/ 0.058
t = 5.189
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An investment of $65,000 is increasing at a rate of 3.2% per year. Which function represents how to find the value of the investment after t years?
Answer:
I honestly don't know I just need points
LITTLE BIT Confuse i tried area formula which is x/360 pi (r)squred but wont work
The side length of the square with the same area as the circle is given as follows:
9.75 cm.
What is the area of a circle?The area of a circle of radius r is given by π multiplied by the radius squared, as follows:
A = πr²
The radius for this problem is of 5.5 cm, hence the area of the circle is given as follows:
A = π x 5.5²
A = 95.03 cm².
For a square of side length s, the area is given by the side length squared, that is:
A = s².
Hence the desired side length is obtained as follows:
s² = 95.03
s = sqrt(95.03)
s = 9.75 cm.
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Determine three distinct points on the line 2 x+2 y=32. Enter your points as ordered pairs (x, y)(x,y) separated by commas.
Graph the line 2 x+2 y=32x by plotting two of the points you found on the line.
What is the slope of the line 2 x+2 y=32
What does the slope say about the relationship between the lengths and widths of rectangles with perimeter 32?
The distinct points are (1, 15), (2, 14) and (3, 13)
The slope implies that as the length increases by 1, the width decreases by 1
How to determine the distinct pointsFrom the question, we have the following parameters that can be used in our computation:
2x + 2y = 32
Divide by 2
So, we have the following representation
x + y = 16
Make y the subject
y = 16 - x
Set x = 1, 2 and 3
So, we have
y = 16 - 1 = 15
y = 16 - 2 = 14
y = 16 - 3 = 13
So, the points are (1, 15), (2, 14) and (3, 13)
The slope is calculated as
y = mx + c
Where m = slope
When compared, we have
slope = -1
This means that as x increases, y decreases
The graph is attached
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