The regular price is $22.5 if everything in a store is 20% off, and the discounted price of an item is $18.00
What is the percentage?It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.
We have:
If everything in a store is 20% off, and the discounted price of an item is $18.00
Let's suppose the regular price is x
(100-20)% of x = 18
80x/100 = 18
x = $22.5
Thus, the regular price is $22.5 if everything in a store is 20% off, and the discounted price of an item is $18.00
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Hamish and Harry work as plumbers. harry earns a dollar more than 5/4 the amount Hamish earns per hour. the amount Harry earns per hour is 2$ less than 7/5 the amount Hamish earns per hour. how much to both of them earn per hour?
Answer:
Hamish earns $20 per hour, and Harry earns $26 per hour.
Step-by-step explanation:
Harry earns
$1+(5/4)•x and also (7/5)•x-$2
$1+(5/4)•x = (7/5)•x-$2
$1+$2= (7/5)•x-(5/4)•x
3=(7•4•x-5•5•x)/20
3=3x/20
3•20=3x
X=20, Hamish earns $20
Substitute x in one of the expressions
1+(5/4)•20=1+25=26, Harry earns $26
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(J) 80 • 125
(K) (80+65) • 125
(L) (65 • 80) + (80 • 60)
M (65•80)+(80•60)
N (65•80)+ 1/2 (125 • 100)
Answer:
option N is the correct option, apply Formula of area of rectangle and triangle by splitting figure into 2 parts
Evergreen Landscaping bought 4 tons of topsoil and 3 tons of mulch for $1460. The next week the
firm bought 5 tons of topsoil and 2 tons of mulch for $1391. Find the price per ton for each item.
Answer: The price per ton of topsoil is $179
and price per ton of mulch is $248.
Step-by-step explanation:
Let price of 1 ton of topsoil be x
and price 1 ton of mulch be y
According to question
4x + 3y = $1460 -(i)
and 5x + 2y = $1391 -(ii)
Now solving these linear equations
By multiply (i) equation with 5 and divide it by 4
we get 5x + [tex]\frac{15}{4}[/tex]y = $1825 -(iii)
Subtract equation (ii) from equation (iii)
5x +[tex]\frac{15}{4}[/tex] y - 5x - 2y = $1825-$1391
[tex]\frac{7}{4}[/tex]y=$434
y = $434х[tex]\frac{4}{7}[/tex] = $248
put value of y in equation (i)
4x + 3($248) = $1460
4x - $744 =$1460
4x = $716
x = $179
The price per ton of topsoil is $179
the price per ton of mulch is $248.
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In the 30-60-90 triangle below, side s has a length of.
length of
30
90⁰
S
10
60"
A. 5.2: 5.2
B. 5,10,3
and side q has a
Answer: C, 5, 5√3
Step-by-step explanation:
The short leg of a 30-60-90 triangle equal half the hypotenuse, 10/2 = 5. The long leg equals √3 times the short leg, 5*√3 = 5√3.
The high temperature on Friday was 8 degrees above zero. The low temperature was 3 degrees below zero. Which expression gives the average of the low and high temperatures?
Negative (3 + 8) divided by 2
(negative 3 + 8) divided by 2
(negative 3 + 8) divided by (negative 2)
Left-bracket negative 3 + (negative 8) right-bracket divided by (2) Right-bracket
Using the mean concept, the expression that gives the average of the low and high temperatures is:
(-3 + 8)/2.
What is the mean?The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.
In this problem, the two observations are -3 and 8, hence their average is given by:
(-3 + 8)/2.
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The account balance of each of three children at the end of a month is shown below:
Daniel has −$1.25
Libby has −$2.00
Sandra has as much savings in her account as the amount Daniel owes the bank.
Part A: On a blank paper, draw a number line from −4 to +4. Plot points on the number line to show the account balances of the three children. Label the points using the name of each child. Describe in detail how you created and labeled this number line, and what it looks like in detail. (5 points)
Part B: Determine whether Daniel or Libby owes the bank more. Use absolute values and inequalities to write statements that justify your conclusion. (5 points)
Answer:
Using the concept of number line, we find that Libby owes more than Daniel.
Step-by-step explanation:
Given that the account balance of Daniel is -$1.25 and of Libby is -$2.00. Sandra has as much savings in her account as the amount Daniel owes the bank. So, her account balance is +$1.25.
The numbers to be plotted on the number line are -2.00, -1.25 and 1.25.
The number line is in the attachment.
These numbers are related as: -2 < -1.25 < 1.25.
From the number line, all the names that come left to the origin owe some amount to the bank while all the names that come right to the origin have some money as savings in their account.
Clearly, Daniel and Libby owe the bank.
But since Libby comes before Daniel, Libby owes more than Daniel.
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NO LINKS!! Please help me with this problem
Answer:
23.1 years (nearest tenth)
Step-by-step explanation:
Compound Interest Formula
[tex]\large \text{$ \sf A=P\left(1+\frac{r}{n}\right)^{nt} $}[/tex]
where:
A = final amountP = principal amountr = interest rate (in decimal form)n = number of times interest applied per time periodt = number of time periods elapsedGiven:
A = $1200P = $600r = 3% = 0.03n = 12 (as compounded monthly)t = yearsSubstitute the given values into the formula and solve for t:
[tex]\implies \sf 1200=600\left(1+\dfrac{0.03}{12}\right)^{12t}[/tex]
[tex]\implies \sf 1200=600\left(1.0025\right)^{12t}[/tex]
[tex]\implies \sf \dfrac{1200}{600}=\left(1.0025\right)^{12t}[/tex]
[tex]\implies \sf 2=\left(1.0025\right)^{12t}[/tex]
Take natural logs:
[tex]\implies \sf \ln 2=\ln \left(1.0025\right)^{12t}[/tex]
[tex]\implies \sf \ln 2=12t\ln \left(1.0025\right)[/tex]
[tex]\implies t=\dfrac{ \ln 2}{12 \ln (1.0025)}[/tex]
[tex]\implies t=23.13377513...[/tex]
[tex]\implies t=23.1\: \sf years \:\:(nearest\:tenth)[/tex]
The money will double in value in approximately [tex]\boxed{\sf 23.1}[/tex] years.
Used formula
[tex]\boxed{\sf A=P(1+\dfrac{r}{n})^{nt}}[/tex]
[tex]\\ \implies \sf 1200=600\left(1.0025\right)^{12t}[/tex]
[tex]\\ \implies \sf \dfrac{1200}{600}=\left(1.0025\right)^{12t}[/tex]
[tex]\\ \implies \sf 2=\left(1.0025\right)^{12t}[/tex]
Apply natural logarithm on both sides[tex]\implies \sf \ln 2=\ln \left(1.0025\right)^{12t}[/tex]
[tex]\\ \implies \sf \ln 2=12t\ln \left(1.0025\right)[/tex]
[tex]\\ \implies t=\dfrac{ \ln 2}{12 \ln (1.0025)}[/tex]
[tex]\\ \implies t=23.1years[/tex]
Use the property of real numbers to write the expression 2/5 x (-7)x 5/2
The simplified form of the expression 2/5 x (-7)x 5/2 would be -7.
How to solve the expression?When two fractions are multiplying each other, the numerator of both fractions multiplies each other, likewise the denominator of both fractions respectively.
Use the property of real numbers to write the expression
[tex]\dfrac{2}{5} \times (-7) \times \dfrac{ 5}{2}\\\\\dfrac{10}{10} \times (-7) \\\\-7 \times 1\\\\= -7[/tex]
Therefore, The simplified form of the expression would be -7.
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Pls help me with my math
Answer:
d.
Step-by-step explanation:
Left line is defined when x < 1 (x is less than 1). The point is not full and that means that x = 1 is not included.
Right line is defined when x is greater or equal to one x ≥ 1.
Options that have x < 1 and x ≥ 1 are b and d, so the answer is one of those.
Equations of the lines are in slope-intercept form y = mx + b, where m is slope and b is y-intercept.
Right line has steeper slope than left line, so the slope of right line will have bigger absolute value. That is the case with option d. (Left line has slope -1 and right one has slope -2, absolute value of right slope is bigger.)
You could also check with y-intercepts. Left line has y-intercept at y = 2 and left line is defined when x < 1. Only option d meets these conditions.
The law of cosines is a² + b² - 2abcosC = c². Find the value of 2abcosC.
A. 20
B. 40
C. 37
D. -40
Answer:
C
Step-by-step explanation:
a = 4
b = 5
c = 2
C = arccos((a² + b² - c²) / 2ab)
C = arccos((16 + 25 - 4) / 2(4)(5))
C = arccos(37 / 40)
C = 22.33°
2abcosC
2(4)(5)cos(22.33)
40(0.925)
37
Option C is correct, if the law of cosines is a² + b² - 2abcosC = c² then the value of 2abcosC is 37.
What is Trigonometry?Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.
We have from law of cosines that a² + b² - 2abcosC = c²
We have to find the value of 2abcosC.
Now let us find the value of C
C = arccos((a² + b² - c²) / 2ab)
C = arccos((16 + 25 - 4) / 2(4)(5))
C = arccos(37 / 40)
C = 22.33°
Now plug in the value of C in 2abcosC.
2abcosC
=2(4)(5)cos(22.33)
=40(0.925)
=37
Hence, option C is correct, if the law of cosines is a² + b² - 2abcosC = c² then the value of 2abcosC is 37.
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The slope of the line below is 0.8. Write the equation of the line in point-slope
form, using the coordinates of the labeled point. Do not use parenthesis on
the y side. Coordinates (-2,-3)
The equation of the line is y = 0.8x - 1.4 if the slope of the line is 0.8 and line passes through coordinates (-2,-3)
What is a straight line?A straight line is a combination of endless points joined on both sides of the point.
The slope 'm' of any straight line is given by:
[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]
The slope m = 0.8
The line passing through coordinates (-2,-3)
y = mx + c
y = 0.8x + c
Plug the point in the equation.
-3 = 0.8(-2) + c
c = -1.4
y = 0.8x - 1.4
Thus, the equation of the line is y = 0.8x - 1.4 if the slope of the line is 0.8 and line passes through coordinates (-2,-3)
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Help me and i'll help you earn more points if the question is right
At school B, 108 year 8 students study French.
This is 60% of the year group.
How many students do not study French in year 8 in school B?
Step-by-step explanation:
108 = 60%
1% = 60%/60 = 108/60 = 1.8
100% = 1%×100 = 1.8×100 = 180
how many do not study French ?
the remainder of the students. that is 40% (100% - 60%) or 72 students (40×1.8 or simply 180-108).
Answer:
72 students do not study French.
Step-by-step explanation:
60% = 108 students
1. 108 ÷ 60 = 1.8 ( this is to find 1% of the students)
2. 1.8(1%) × 40 = 72
To check the answer:
108 + 72 = 180
180 × 60% = 108
A geometric seqerence 1.5, -3, 6, -12 .... How many regative terms in the sequencs greater than
- 6000 ?
The total negative terms are 4 which are greater than -6000 if the geometric sequence 1.5, -3, 6, -12 ... with a common ratio -3.
What is a sequence?It is defined as the systematic way of representing the data that follows a certain rule of arithmetic.
We have:
A geometric sequence 1.5, -3, 6, -12 ....
The common ratio r = -3/1.5 = -2
1.5, -3.6, 6, -12, 36, -108, 324, -972, 2916, -8748
The total negative terms = 4
Thus, the total negative terms are 4 which are greater than -6000 if the geometric sequence 1.5, -3, 6, -12 ... with a common ratio -3.
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How many square feet of tile is needed for a room of 24 foot x 24 foot
Answer:576
Step-by-step explanation:
24 squared is 576
If a 103 pound man can have 1292 mg of a medicine in a day, how much can a 102 pound woman have? (round answer to one decimal place) She can have mg
Answer:
1279.5mg
Step-by-step explanation:
103 pound man takes -1292mg of medicines
102 pound woman will take -xmg of medicine
cross multiply
102x1292=103x
131784=103x
x=131784/103
x=1279.5mg
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Women will have 1279.5mg of medicine in a day.
How much can a 102-pound woman have?103-pound man takes -1292mg of medicines.
102-pound woman will take x mg of the medicine.
By cross multiply
102x1292=103x
131784=103x
x=131784/103
x=1279.5mg
What is an example of a word problem?Word problems normally include mathematical modeling questions, where records and information approximately a positive machine is given and a student is needed to expand a model. For example, Jane had $5.00, then spent $2.00. How much does she have now?
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What is the slope of the line that passes through the points (6, 2) and (4, 10)? −4 −14 14 4
Answer:
-4
Step-by-step explanation:
The equation for slope is:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
m: Slope
(6, 2) = [tex](x_1, y_1)[/tex]
(4, 10) = [tex](x_2, y_2)[/tex]
Substitute these values into the equation:
[tex]m=\frac{10-2}{4-6}=\frac{8}{-2}=-4[/tex]
Therefore the slope is -4.
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[tex]\Large\maltese\underline{\textsf{A. What is Asked}}[/tex]
What is the slope of the line that passes through the points? 2 points given
[tex]\Large\maltese\underline{\textsf{B. This problem has been solved!}}[/tex]
The formula used here, is [tex]\bf{\dfrac{y2-y1}{x2-x1}}[/tex].
[tex]\rule{300}{1.7}[/tex]
[tex]\bf{\dfrac{10-2}{4-6}}[/tex] | subtract
[tex]\bf{\dfrac{8}{-2}}[/tex] | evaluate
[tex]\bf{-4}[/tex]
[tex]\rule{300}{1.7}[/tex]
[tex]\bf{Result:}[/tex]
[tex]\bf{=Slope\;-4}[/tex]
[tex]\boxed{\bf{aesthetic\not101}}[/tex]
Find the domain and range of the function graphed below. Write your answers in interval notation.
Answer:
Domain: [tex][1, \infty)[/tex]Range: [tex](-\infty, -2][/tex]Step-by-step explanation:
The domain is the set of x-values and the range is the set of y-values.
The Rainbow Motor Motel is a 50-room facility with a restaurant to accommodate its guests. The motel is open 365 days a year, even on leap years; as Lurena Boucha, the proprietor, closes down the facility every February 29, her birthday, for an all day celebration of four years of successful operations. On the average, 98% of the rooms are available for sale. For the year just ended, the actual number of rooms sold totaled 15,000 and the number of guests for the year totaled 20,000. The projected occupancy rate for the next year is 82% of the available rooms based on past experience. The food information is as follows:
Sales $150,000, Beg Inventory 8,000, Purchases $70,000, Ending Inventory, $ 13,000 Consumption by employees (free of charge) $3,000, Number of checks 64,139. Cost of sales ?
From the information given, the cost of sales is $65,000. See the explanation below.
What is the definition of cost of sales?Add your initial inventory to the purchases made over the time period, remove that amount from your ending inventory, and that is your cost of sales.
Cost of Sales = (Bi + P) - Ei
Where Bi is Beginning Inventory
P is Purchases; and
Ei is Ending Inventory.
So the derivation of the solution above is?Beginning Inventory = 8,000
(add) Purchase = 70,000
Bi + P = 78,000
Ending Inventory = 13,000
Cost of sales = 78,000 - 13,000
= $65,000
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Simplify each expression and state whether each is a volume, an area, or neither.
a) n(4)2 x
b) lw+lw+wh+wh+lh+lh
c) 8y2(10y2)
a. 2n^4b, neither a volume nor an area
b. 2Iw + 2wh + 2Ih, It is an area
c. 80 y^4, neither a volume nor an area
How to simply the algebraic expressionsa. n(4) 2 x b
n * n * n* n* 2 * b
2n^4b
It is neither an area nor a volume
b. lw+lw+wh+wh+lh+lh
Collect like terms
2Iw + 2wh + 2Ih
It is an area
c. 8y2(10y2)
8y^2 * 10 * y^2
80 y^4
It is neither a volume nor an area
Thus, the expressions are simplified as a. 2n^4b, b. 2Iw + 2wh + 2Ih, c. 80 y^4
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How many gallons of a 60% antifreeze solution must be mixed with 70 gallons of 15% antifreeze to get a mixture that is 50% antifreeze?
There are 245 gallons of antifreeze solution required.
What is Percentage?Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.
Here, Let 60% antifreeze solution volume = x
15% antifreeze solution volume = 15%
Final concentration 50%
Process
0.6x + 0.15(70) = 0.5(70 + x)
Simplification
0.6x + 10.5 = 35 + 0.5x
0.6x - 0.5x = 35 - 10.5
0.1x = 24.5
x = 24.5/0.1
x = 245 gallons
Thus, There are 245 gallons of antifreeze solution required.
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Find the area of the shaded portion of the
figure. All angles are right angles.
Dimensions are in inches.
3
8
5
======================================================
Explanation:
The white rectangle is 3 by 6 with area of 3*6 = 18 square inches.
The larger rectangle is 8 by 5 with area of 8*5 = 40 square inches.
The difference of these will get us the shaded area:
40 - 18 = 22 square inches
distribute 5x(3x+7)
help asap
Answer:
The Answer is 50 or 50x
Answer: 15x^2+35x ✅
Step-by-step explanation:
Hii, do you need to distribute [tex]\boldsymbol{5x(3x+7)}[/tex]? No problem! (:
How to Distribute?We can solve problems like this one by using what is known as the "distributive property". What it says is: If you have a term that comes before the parentheses, you multiply it times every single term in the parentheses. Let me show you what I mean...
[tex]\twoheadrightarrow\sf 5x(3x+7)[/tex]
[tex]\bullet[/tex] Multiply 5x tmes 3x and 7 - you will obtain
[tex]\twoheadrightarrow\sf 15x^2+35x[/tex] (if we multiply x times x we obtain x²)
Voila! There's our solution, cheers! (:
--
Hope that this helped! Best wishes.
[tex]\it Reach\quad far.\:Aim\quad high. \,Dream\quad big.[/tex]
[tex]\bigstar\underbrace[/tex]
--
If you could please answer this that would be awesome!
Please graph it!
The graph is attached with the answer, This is looking like a horizontal staircase
What is a Step Function ?A step function is a piece wise function whose all pieces are horizontal line or a point.
It is given in the question to graph the interval
-2 ≤x≤2
for f(x) = |x+3|
-2 1
-1 2
0 3
1 4
2 5
The graph is attached with the answer.
This is looking like a horizontal staircase
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A motorboat moves across a lake at a constant speed. When it begins, it is 64 km from the shore. After 17 minutes, it is 30 km from the shore. Which function describes the motorboat's distance from the shore?
A. y=-17x+30
B. y=2x+64
C. y=-17x+64
D. y=-2x+64
Please solve fast!
I am giving a lot of points!
Answer:
y = -2x + 64
Explanation:
The x represents the time in minutes and y represents distance in km.
Determine coordinates: (0, 64), (17, 30)
Find slope:
[tex]\sf slope : \dfrac{y_2 - y_1}{x_2- x_1} = \dfrac{\triangle y}{\triangle x} \ \ \ where \ (x_1 , \ y_1), ( x_2 , \ y_2) \ are \ points[/tex]
[tex]\rightarrow \sf slope \ (m) : \dfrac{30-64}{17-0} = -2[/tex]
Find equation:
[tex]\sf y- y_1 = m(x - x_1)[/tex]
[tex]\sf y - 64 = -2(x - 0)[/tex]
[tex]\sf y = -2x + 64[/tex]
What are the rotations that will carry this equilateral triangle onto itself?
A
B
90° counterclockwise rotation about its center P
270° counterclockwise rotation about its center P
120° counterclockwise rotation about its center P
240° clockwise rotation about its center P
O225 clockwise rotation about its center P
O200 counterclockwise rotation about its center P
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The rotations that will carry the equilateral triangle in discuss onto itself are;
90° counterclockwise rotation about its center P.270° counterclockwise rotation about its center P.Which rotations will carry this equilateral triangle onto itself?It follows from the task content that the rotation which produces the desired output in which case, the rotation maps exactly unto the equilateral triangle is required.
On this note, when the rotation is 90° and 270° about the center P in which case, the rotation can be clockwise or anticlockwise, the desired result is obtained.
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Answer: 240 and 120
Step-by-step explanation:
Find the equation of the line parallel to y = 2x - 4 that runs through the point (-2, 4).
y = 1/2x + 4
y = 2x + 8
y = 2x + 4
y = -1/2x + 8
Answer:
y = 2x + 8
Explanation:
Equation: y = 2x - 4
Comparing it with slope intercept form "y = mx + b" where 'm' is slope and 'b' is y-intercept. This function has slope: 2 and y intercept of -4
Parallel lines has same slope.
Passes through (-2, 4)
[tex]\sf y - y_1 = m(x - x_1)[/tex]
[tex]\sf y - 4 = 2(x - (-2))[/tex]
[tex]\sf y - 4 = 2(x + 2)[/tex]
[tex]\sf y = 2x + 4 + 4[/tex]
[tex]\sf y = 2x + 8[/tex]
Answer: y = 2x + 8
Step-by-step explanation:
This is a fairly simple problem. I hope this helps!
So, to find a line parallel, it's simple, and it only requires that for the other line to have the same slope and a different y-intercept (or same "m" and different "b" in the equation y = mx + b).
To find a line parallel to a point is slightly harder, but don't worry, I'll teach you how.
To do this, we have to recognize the point. The point given is (-2, 4) where -2 is the x-value and 4 is the y-value. Remember, points always go by (x, y).
So, we set y to 4, and we set x to -2.
When testing out lines that are parallel to a point, you must always be careful that you end up with the same value. Such as 4 = 4 or 8 = 8, etcetera.
We get:
4 = 2 × (-2) + 8
Simplifying, we get:
4 = -4 + 8
Adding -4 to 8, we get 4:
4 = 4
Thus, y = 2x + 8 is parallel to the point (-2, 4)
find value o x 235 degree arc
The length of the arc given in the question is; 4.1r
How to find the length of an arc?We are given;
Angle at which arc is subtended; θ = 235°
Formula for arc length subtended at an angle θ is;
Arc Length = (θ/360) * 2πr
where r is radius of circle.
Thus;
Arc Length = (235/360) * 2πr
Arc Length = 4.1r
The complete question is;
Find the value of the length of an arc that subtends an angle of 235 degrees to the circle's center.
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The table shows the heights of three different plants.
Answer:
7/4 meters
Step-by-step explanation:
the tallest plant is 19/8
since they have all the same denominaters we can just compare the top numbers
so
the smallestp lant is 5/8
19/8 - 5/8 = 14/8
7/4 is your final answer after simplifying
Value of x or y so that the line through the points has the given slope:
(X,9) and (9,-3), slope is -6/7
Sorry if it’s not worded great.
If we want the slope to be -6/7, then the value of x must be -5.
How to find the value of x?Remember that if a linear equation passes through (x₁, y₁) and (x₂, y₂), then the slope is:
[tex]a = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
Here we have the points (x, 9) and (9, -3), and the slope must be -6/7, so we need to solve:
[tex]\frac{- 3 - 9}{9 - x} = \frac{-6}{7} \\\\\frac{-12}{9 - x} = \frac{-12}{14}[/tex]
Where on the second line we multiplied and divided the right fraction by 2.
Comparing the fractions, we see that we must have:
9 -x = 14
9 - 14 = x
-5 = x
So the value of x must be -5.
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