The equation for regression line is ŷ = -0.0192X + 39.288,
The correlation coefficient is -0.9817,
The population of Detroit in 2008 is 0.73 millions.
What is a regression line?A line that, using the bivariate data gathered, summarises the linear relationship (or linear trend) between the two variables in a linear regression study.
An estimate of the line that depicts the actual, but the unidentified, linear relationship between the two variables is called a regression line. When the value of the explanatory variable is known, the regression line's equation is used to predict (or estimate) the value of the response variable.
Given table showing the population of Detroit each decade.
year 1960 1970 1980 1990 2000
Population (millions) 1.67 1.51 1.20 1.03 0.95
A. equation for regression line,
X - Mx Y - My (X - Mx)² (X - Mx)² (X - Mx)(Y - My)
-20 -20 400 0.158 -7.96
-10 -10 100 0.057 -2.38
0 0 0 0.005 0
10 10 100 0.059 -2.42
20 20 400 0.104 -6.44
Sum: 1000.00 Sum: 0.382 Sum: -19.200
Sum of X = 9900
Sum of Y = 6.36 millions
Mean X = 1980
Mean Y = 1.272
Sum of squares (SSX) = 1000
Sum of products (SP) = -19.2
Regression Equation = ŷ = bX + a
b = SP/SSX = -19.2/1000 = -0.0192
a = MY - bMX = 1.27 - (-0.02*1980) = 39.288
ŷ = -0.0192X + 39.288
B. correlation coefficient,
X Values
∑ = 9900
Mean = 1980
∑(X - Mx)² = SSx = 1000
Y Values
∑ = 6.36
Mean = 1.272
∑(Y - My)² = SSy = 0.382
X and Y Combined
N = 5
∑(X - Mx)(Y - My) = -19.2
r Calculation
r = ∑((X - My)(Y - Mx)) / √((SSx)(SSy))
r = -19.2 /√((1000)(0.382)) = -0.9817
Meta Numerics
r = -0.9817
The value of R is -0.9817.
High X variable scores correlate negatively with low Y variable scores because of this strong negative connection (and vice versa).
C. population in 2008
y = -0.0192X + 39.288
substitute x = 2008
y = -0.0192(2008) + 39.288
y = 0.7344
population in 2008 is 0.73 millons.
Hence the equation is ŷ = -0.0192X + 39.288,
the correlation coefficient is r = -0.9817
and population of Detroit in 2008 is 0.73 millions.
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PLEASE HELP ME SUBJECT MATH
Answer:
11) y = -x + 9
12) y = 4x - 16
13) y = x - 5
14) y = -2x + 4
15)y = 0.5x - 3
Step-by-step explanation:
In all these equations isolate y by moving the other terms to the left side and dividing by the coefficient of x to get the slope intercept form
11)
x + y = 9
y = -x + 9 by moving x to the right side
12)
4x - y = 16
-y = -4x + 16
Multiply by -1 to get y = 4x - 16
13)
2x - 2y = 10
-2y = -2x + 10
Divide by -2 to get y = x - 5
14)
4x + 2y = 8
2y = -4x + 8
Divide by 2 to get y = -2x + 4
15)
x - 2y = 6
-2y = -x + 6
Divide by -2 to get y = x/2 - 6 = 0.5x -3
Isabel is going to rent a truck for one day. there are two companies she can choose from, and they have the following prices. company a charges $90 and allows unlimited mileage. company b has an initial fee of $75 and charges an additional $0.60 for every mile driven. for what mileages will company a charge less than company b? use m for the number of miles driven, and solve your inequality for m .
Company A charges $90 for unlimited mileages, while company B charges $75 initial fee and #0.6 per mile driven. Company A will charge less than company B if the number of miles driven is greater than 25 miles or m > 25.
To solve the problem, we need to translate the word problem into equations.
Let C(A) and C(B) represent the cost charged by company A and B respectively. Let m = the number of mileages.
Company A charges $90 and allows unlimited mileage, it means the charge is a constant and it is not a function of mileage.
Hence,
C(A) = 90
Company B has an initial fee of $75 and charges an additional $0.60 for every mile driven. Hence,
C(B) = 75 + 0.6 m
The inequality that translate: for what mileages will company A charge less than company B is:
C(A) < C(B)
90 < 75 + 0.6 m
To solve the above inequality, subtract 75 from both sides:
90 - 75 < 75 + 0.6 m - 75
15 < 0.6 m
m > 15/0.6
m > 25
Hence, if the mileages > 25 miles, company A charges less than company B.
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nate has a grid made of shaded and unshaded 2 cm by 2 cm squares, as shown. he randomly places a circle with a diameter of 3 cm on the board so that the centre of the circle is at the meeting point of four squares. the probability that he places the disk so that it is touching an equal number of shaded and unshaded squares is ab. what is a b ?
The value of a and b is 1.
THE PROBABILITY OF A AND BThe probability that Nate places the disk so that it is touching an equal number of shaded and unshaded squares is ab, where a and b are integers.
To find the value of a and b, we need to determine the total number of ways Nate can place the disk (the denominator of the probability fraction) and the number of ways he can place the disk so that it touches an equal number of shaded and unshaded squares (the numerator of the probability fraction).
Since the center of the circle must be at the meeting point of four squares, the only possible places for the center are the points where four squares meet. Since the grid is made of 2 cm x 2 cm squares, there are 4 shaded squares and 4 unshaded squares. So, there are 4 centers that could be placed on a shaded square and 4 centers that could be placed on an unshaded square.
So the denominator of the probability fraction is 8.
Now, to calculate the numerator, we need to determine the number of ways Nate can place the disk so that it touches an equal number of shaded and unshaded squares.
As the center of the circle is at the meeting point of four squares, the center of the circle is placed at the intersection of 2 shaded and 2 unshaded squares.
So, the numerator of the probability fraction is 8.
Therefore, the probability that Nate places the disk so that it is touching an equal number of shaded and unshaded squares is 8 ÷ 8 =1.
So the value of a and b is 1.
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The formula for area of a triangle is A = b*h/2. What is the area of the triangle?
Answer:
63
Step-by-step explanation:
b*h/2
b= 18
h=7
(7*18)/2 = 63
julie mistakenly calculated the conditional relative frequency for college students who like comedy as being 70% what did julie actually calculate and what is the correct answer
Therefore, correct response is percentage C. "For comedies that college students enjoy, she estimated the conditional relative frequency. The right response is 28%.
Define a percentage.A number or figure that is expressed as a fraction of 100 is known as a percentage in mathematics. There are also sporadic uses of the acronyms "pct.," "pct," and "pc." However, the "%" symbol used to represent it is often employed. No dimensions exist; the % amount is flat. Percentages are essentially fractions because their numerator is 100. A percent symbol (%) should be placed in front of a number to indicate that it is a percentage. For instance, if you answered correctly 75 out of questions in total on a test, you'd get a 75%.
Here,
Given :
She determined the combined relative frequency for humor and college. For college students who enjoy comedy, the appropriate conditional relative frequency value is 28%.
For comedies that college students enjoy, she determined the conditional relative frequency. For college students who enjoy comedy, the appropriate conditional relative frequency value is 16%.
For comedies that college students enjoy, she determined the conditional relative frequency. The right response is 28%.
She determined the combined relative frequency for humor and college. The right response is 16%.
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a vacant lot measures 50' x 102'. if the lot sold for $108,250, what was the price per square foot...?
The price per square foot of a vacant lot that measures 50' x 102' and sold for $108,250 is $21.23.
To find the price per square foot of the vacant lot, we need to divide the total price by the total area of the lot.
We can find the area of the lot by multiplying the length by the width:
Area = 50' x 102' = 5100 sq.ft
Then, we can divide the total price by the total area to find the price per square foot:
Price per sq.ft = Total Price / Total Area
Price per sq.ft = 108,250 / 5100
Price per sq.ft = 21.23
Therefore, the price per square foot of the vacant lot is $21.23.
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What is the range of the function f?
f(x) = 3x² + 18x
O A. (-00,00)
O B. (-00, 18]
O C.
-6,00)
OD.
[-27,00)
A
The range for the function f(x) = 3x² + 18x is option d: [-27 , ∞).
What is the range of a function?
A function's range includes all conceivable values for y. Y = f(x) is the formula to determine a function's range . It is only a function in a relation if each x value has exactly one y value.
The given function is -
f(x) = 3x² + 18x
The set of values of the dependent variable for which a function is defined is a function's range.
For a parabola ax^2+bx+c with vertex (xv,yv) -
If a<0 the range is f(x) ≤ yv.
If a>0 the range is f(x) ≥ yv.
Here a=3, and vertex (xv,yv) = (-3,-27)
So, f(x) ≥ -27.
Therefore, the range is [-27 , ∞).
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Write the equation of this line in slope-intercept form.
Answer:
Step-by-step explanation:
The line passes through points (2,1) and (0,-5)
Using this, we can find the slope, which is
change in y/change in x = -6/-2 = 3
Therefore the slop of this line is 3.
Next, the y-intercept of this line is -5.
So we can find the equation of this line in slope-intercept form which is:
y=3x-5
when you refer to the meer-kitty survey feedback tab, you are pleased to find that the available data is aligned to the business objective. however, you do some research about confidence level for this type of survey and learn that you need at least 120 unique responses for the survey results to be useful. therefore, the dataset has two limitations: first, there are only 40 responses; second, a meer-kitty superfan, user 588, completed the survey 11 times. as the survey has too few responses and numerous duplicates that are skewing results, what are your options? select all that apply.
Conduct additional surveys to increase the total number of responses.
Remove duplicates from the dataset to eliminate skewing of results
Use caution when interpreting the results and consider them exploratory rather than conclusive
Consider using a different methodology for gathering data, such as focus groups or interviews
Adjust the confidence level for the survey results to account for the smaller sample size
Use a different data analysis technique, such as bootstrapping, to account for the limitations of the dataset
Consider using a sample survey method, like stratified sampling or cluster sampling.
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Look at the line graphed below.
Which equation can be used to graph all the points on the line?
�
=
2
�
y=2x
�
=
�
+
1
y=x+1
�
=
�
−
1
y=x−1
�
=
2
�
−
1
y=2x−1
Answer:
y = x + 1
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (1, 2) and (x₂, y₂ ) = (8, 9) ← 2 points on the line
m = [tex]\frac{9-2}{8-1}[/tex] = [tex]\frac{7}{7}[/tex] = 1
the line crosses the y- axis at (0, 1 ) ⇒ c = 1
y = x + 1 ← equation of line
Match each of the descriptions with the correct rule for the transformation.
Question 1 options:
Translation 2 left and 2 up
Rotation 90° counterclockwise
Translation 2 right and 2 down
Reflection over the x-axis
1.
(x, y) → (-y, x)
2.
(x, y) → (x + 2, y – 2)
3.
(x, y) → (x, -y)
4.
(x, y) → (x – 2, y + 2)
Answer:
1. Rotation 90° counterclockwise
(x, y) → (-y, x)
2. Translation 2 right and 2 down
(x, y) → (x + 2, y – 2)
3. Reflection over the x-axis
(x, y) → (x, -y)
4. Translation 2 left and 2 up
(x, y) → (x – 2, y + 2)
Step-by-step explanation:
Translation 2 left and 2 up
To translate (move) a point two units to the left, we subtract 2 from its x-value. Similarly, to translate (move) a point two units up, we add 2 to its y-value.
(x, y) → (x – 2, y + 2)Rotation 90° counterclockwise
When rotating a point 90° counterclockwise, the y-value becomes negative, and the x and y switch:
(x, y) → (-y, x)Translation 2 right and 2 down
To translate (move) a point two units to the right, we add 2 to its x-value. Similarly, to translate (move) a point two units down, we subtract 2 from its y-value.
(x, y) → (x + 2, y – 2)Reflection over the x-axis
When a point is reflected over the x-axis, the y-value is negated but the x-value stays the same:
(x, y) → (x, -y)
find the percentage error if 3,750 is used as an approximation to 3,754.
give the answer rounded to four decimal places.
a.1066 %
b. -0.1066 %
c.0011 %
d. 0.1067 %
The percentage error if 3,750 is used as an approximation to 3,754 as calculated is found out to be as , 0.1066%.
We calculate the percentage of error as ,
| Vobs – Vtrue |/ Vtrue× 100%
Therefore the percentage error in this case will be ,
= 3754 - 3750/3750
= 4/3750
=0.1066%
Therefore, the required POE is found out to be as , 0.1066%.
Percent error tells us about the magnitude of our errors while measuring anything , this concept is used in approximation. Lower percentage errors suggest that we are getting close to the original number. A 1% inaccuracy, for example, implies that we were extremely close to the approved number, whereas a 48% error indicates that we were rather far from the genuine value.
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Please help me! Show me the solution cause thats all I need! Please dont do it wrong I know the answer but need the solution! Thank you!
Solution for the given expression is x = 16y^2 -5.
What is an algebraic Expression?Any mathematical statement that includes numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression. In the phrase 4m + 5, for instance, the terms 4m and 5 are separated from the variable m by the arithmetic sign +.
Given an expression in terms of x where y and x both are variables
To make x the subject we need to calculate the value of x in terms of y
Thus,
√(x +5) / 4 = y
multiply by 4 both sides
√(x + 5 ) = 4y
take square
x + 5 = 16 y²
x = 16y² - 5
therefore, given expression in terms of y is x = 16y² - 5.
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Consider each distribution. Determine if it is a valid probability distribution or not, and explain your answer. (a) X 0 1 2 . P(X) 0.22 0.62 0.16 Yes. The probabilities sum to 1. No. The probabilities do not sum to 1. No. The probabilities sum to 1. Yes. The probabilities do not sum to 1.
Yes, the above mentioned is a valid probability distribution because the probabilities add up to give you 1.
Probability distribution gives you the probability of different variations of the event happening. It gives the chances of the occurrence of random events like rolling a die, tossing a coin, etc. To check whether your probability distribution is right, you have to sum up your probabilities. If it adds up to 1, it is right. If it does not, it is not. Only if the sum is 1, the table shows the real probability of the event happening. In this question, 0.22 + 0.62 + 0.16 = 1. Therefore, the probability distribution is valid.
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A plastic container has 264 yellow marbles. The rest of the marbles are blue. The number of yellow marbles is 60% of the total number of marbles. How many total marbles are blue?
Answer: 176 BLUE marbles
Explanation:
First --> Total marbles ==> 264 / 0.60 = 440
Second --> Hence, the total number of BLUE marbles is 440 - 264 = 176
and there is 176 BLUE marbles
Answer:
660
Step-by-step explanation:
first, 264 yellow marbles.
the percentage of yellow is 60.
If total percentage is 100 then, blue is 100-(yellow percentage)
that is: 40 percent
the next sentence.
total marbles of blue is:
40x/100 = 264.0.4x = 264.divide both sides by 0.4
x = 264/0.4x= 660.
Joshua is driving to the store. the average distance din miles, he travels over minutes is given by the function (1) - 0.57. what is the
75 miles
7.5 minutes
7.5 miles
15 minutes
Driving to the supermarket is Joshua. He covers 7.5 miles since he goes an average of 0.56 miles per minute.
Why is mean called the average?By dividing the entire specific number by sum of all the values, the average can be obtained. A mean may indeed be calculated by adding all of the values in a sample of data. In other terms, a means is also known as the arithmetic mean. The average is referred to as having a mean.
The provided function is
d(t) = 0.5t
Simply substitute it to get the figure set t = 15
7.5 miles are equal to d (15) 0.5 (15).
To get the distance, use the range equations d = st, which says "distance equals force times time." Rate and speed are equivalent because they both indicate a specific length of distance per unit time, such like km/h or kilometers per hour. R = s = d/t is true if clip r and mobility s are equal.
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Given the circle of Arc RO=125.83 and Arc QO=22.17 what is m/_P? Round answer to the nearest hundredth
The angle formed by the intersection of secant and tangent is as follows:
m∠P = 51.83 degrees.
How to find angles when tangent and secant intersect?A line that touches the circle at a single point is known as a tangent to a circle. Secant is straight line that intersects a curve at two or more points.
Therefore, the measure of the angle formed by the intersection of a tangent and a secant is equals to half the difference of the intercepted arcs.
Hence,
m∠P = 1 / 2 (125.83 - 22.17)
m∠P = 1 / 2 (103.66)
m∠P = 1 / 2 × 103.66
m∠P = 51.83 degrees
Therefore, the angle formed by the intersected secant and tangent is 51.83 degrees.
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Which is bigger 2 ^845 or 5 ^362?
Answer:
2^845 is greater than 5^362.
Step-by-step explanation:
To compare the two numbers, we can evaluate them using the logarithm function with base 2 and base 5 respectively.
2^845 = 2^(845 * log2(2)) = 2^(845 * 1) = 2^845
5^362 = 5^(362 * log5(5)) = 5^(362 * 1) = 5^362
The logarithm of a number is the exponent to which the base must be raised to give that number. Since logarithm function is a monotonically increasing function, if we compare log base a of x to log base a of y, logarithm of x is greater than y if x is greater than y.
So 2^845 > 5^362 if 845 > 362 * log5(2)
We can calculate log5(2) = log5(2)/log5(2) = 0.6309
so 845 > 362 * 0.6309
845 > 229.8198
so 845 is greater than 229.8198, therefore 2^845 is greater than 5^362.
Answer:
Step-by-step explanation:
2^845 = 2^5(2^7)^120 = 32(128)^120,
5^362 = 5^2(5^3)^120 = 25(125)^120,
2^845 is bigger.
The diameter of a vase is now 4 cm. If the diameter increases by a factor of 7/3, what will be the diameter then?
Answer:
9 [tex]\frac{1}{3}[/tex]
Step-by-step explanation:
[tex]\frac{4}{1}[/tex] x [tex]\frac{7}{3}[/tex] = [tex]\frac{28}{3}[/tex] = 9 [tex]\frac{1}{3}[/tex]
Factor out the greatest common factor ?
Find the class with the least number of data values. a. 55-65 b. 75-85 c. 65-75 d. 85-95
As per the given bar graph, the class with the least number of data values is 85 - 95.
The term bar graph in math is defined as a graphical representation of data, quantities, or numbers using bars or strips and they are used to compare and contrast different types of data, frequencies, or other measures of distinct categories of data.
Here we have the following bar graph with the values are plotted on it.
By looking into the given graph we have idetintified the value of the interval as follows:
35 - 45 = 3
45 - 55 = 5
55 - 65 = 8
65 - 75 = 6
75 - 85 = 4
85 - 95 = 2
As we looking into the value we know that the option (d) has the lowest value among them.
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Find the slope of the line graphed below.
Answer: 0.8? i'm not sure lol check explaination
Step-by-step explanation:
slope formula: y2-y1/x2-x1
5-1/3-(-2)=4/5=0.8
a $129 product is marked up 20%. how much is the markup?
Answer:
$25.80
Step-by-step explanation:
Since we need to mark up the price of something, we need to find what 20% of 129 is, then add it to 129. To find our 20%, we put 129 in a fraction like this and get:
[tex]\frac{129}{5} = 25.8[/tex]
So, the markup is $25.80.
Hope this helped!
The vertices of triangle FGH has vertices F(-3, 0), G(6, -1) and H (5, -3). Name the vertices of the image reflected across the line y = x.
a. F' (0, -3), G' (-1, 6), H' (-3,5)
b. F' (3, 0), G' (-6, -1), H' (-5, -3)
c. F' (-3, 0), G' (6, 1), H' (5, 3)
d. F' (0, 3), G' (-1, -6), H' (-3, -5)
Answer:
b. F' (3, 0), G' (-6, -1), H' (-5, -3)
Classify The Variable As Nominal Level, Ordinal-Level, Interv Al-Level, Or Ratio-Level Measurement. А Нь Historical Dates From 800 BC to 1800 AD.
Interval
Nominal
Ordinal
Ratio
The given historical date have time difference. So the Historical Dates From 800 BC to 1800 AD is a interval data. So the option a is correct.
In the given question we have to classify the historical dates from 800 BC to 1800 AD.
All real numbers that fall inside any two of the set's numbers are known as members of an interval, which is a set of real numbers.
Data that may be labelled or categorized into groups that are mutually exclusive within a variable is known as nominal data. There is no logical order in which to place these categories.
Ordinal data is a categorical statistical data type when the distances between the categories are unknown and the variables have naturally occurring, ordered categories.
A type of numerical data is ratio data. It evaluates variables on a continuous scale, with equal distance between neighbouring values.
As we can see that the given historical date have time difference. So the Historical Dates From 800 BC to 1800 AD is a interval data. So the option a is correct.
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Find the length of side xx in simplest radical form with a rational denominator.
well, the triangle is an equilateral, so all sides are equal, we know that the segment "x" stems out of the vertex and drops perpendicular to the other side, now, the vertex "x" stems from has two equal sides.
what the hell all that means? well it means that "x" is an altitude and is also an angle bisector and likewise is also cutting the opposite side into two equal halves, meaning that one side is really 8 + 8 = 16, so then
[tex]\stackrel{altitude}{height}\textit{ of an equilateral triangle}\\\\ h=\cfrac{s\sqrt{3}}{2} ~~ \begin{cases} s=\stackrel{length~of}{a~side}\\[-0.5em] \hrulefill\\ s=16 \end{cases}\implies h=\cfrac{16\sqrt{3}}{2}\implies h=8\sqrt{3}[/tex]
Show all work to identify the asymptotes and state the end behavior of the function f of x is equal to 4x divided by the quantity of x minus 16 end quantity.
Answer:
Step-by-step explanation:
The function f(x) = 4x/(x-16) has two vertical asymptotes at x = 16. This can be seen by taking the limit of the function as x approaches 16 from the left and right sides.
On the left side, as x approaches 16 from the left, the denominator, (x-16), will approach 0, while the numerator, 4x, will approach -∞. This results in a limit of -∞, indicating a vertical asymptote at x = 16.
On the right side, as x approaches 16 from the right, the denominator, (x-16), will approach 0, while the numerator, 4x, will approach +∞. This results in a limit of +∞, also indicating a vertical asymptote at x = 16.
The end behavior of the function is that as x approaches +∞, the function will approach +∞, and as x approaches -∞, the function will approach -∞.
Explain what the slope and y-intercept of the linear model represent in the context of the situation.
The slope and y-intercept can provide important information about the relationship between the variables being modeled.
What are the slope and y-intercept?
The slope and y-intercept are both elements of a linear equation of the form y = mx + b, where m represents the slope of the line and b represents the y-intercept of the line.
The slope (m) represents the rate of change of the dependent variable (y) with respect to the independent variable (x). It tells us how much the y-value changes for a given change in the x-value. The slope can be positive, negative, or zero, and it is often represented as a ratio, such as "rise over run" or "rise/run". A positive slope indicates that the line rises as x increases and a negative slope indicates that the line falls as x increases.
The y-intercept (b) represents the point at which the line crosses the y-axis. It tells us the value of y when x = 0. In other words, the y-intercept is the value of the dependent variable when the independent variable is zero.
Hence, the slope and y-intercept can provide important information about the relationship between the variables being modeled.
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the sum of bill and ted's age is 60. in two years, bill will be three times as old as ted. how old are bill and ted now?
That bill age is currently 46 years old, and the ted age is currently 14 years old, according the provided statement.
You ancient soul, how are you?Frequently, having an ancient soul only means you see things differently. There is nothing improper about that. In fact, most individuals would contend that having a distinct outlook on life may be advantageous to both you and those in your life. Depending on how you do it with your understanding, the wider world may be a possibility.
Equations:
B+2 = 3(t+2), B+t = 60, B-t = 4, and B+t = 60
Solve for "t" by subtracting: 4t = 56 t Equals 14 (Ted's current age).
Calculate "b" as follows: b + t = 60 b + 14 = 60 b Equals 46 (Bill's current age).
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Ditribute to create an equivalent expreion with the fewet ymbol poible. 1/3(3j6)
To find the equivalent expression with the fewest symbols possible for 1/3(3j6),One third of three times the value of six, which is equal to one times the value of two.
1/3(3j6)
= 1/3(3*6)
= 1/3(18)
= 18/3
= 6
= 1j2
To find the equivalent expression with the fewest symbols possible for 1/3(3j6), we need to start by multiplying 3 and 6 together. This gives us the result of 18. Next, we divide 18 by 3, which gives us the result of 6. Finally, we express the result as 1j2, which is the equivalent of 1/3(3j6) with the fewest possible symbols. By following these steps, we can easily calculate the equivalent expression with the fewest symbols. In this case, it is 1j2. The process of calculating the equivalent expression with the fewest symbols is relatively straightforward, but it is important to remember to use the correct order of operations when performing calculations. To ensure accuracy, it is best to work step by step, multiplying 3 and 6 together first and then dividing 18 by 3 to get the final result of 1j2.
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