The average response time for the ambulance company is 13 minutes, with 95% of response times falling between 10 and 16 minutes.
The response times for a specific ambulance company follow a normal distribution with a mean of 13 minutes. This means that the majority of response times will cluster around the average of 13 minutes.
Furthermore, we know that 95% of the response times fall within the range of 10 to 16 minutes. This suggests that the response times are relatively consistent, with only a small percentage of outliers falling outside this range.
In summary, the average response time for this ambulance company is 13 minutes, and 95% of their response times fall between 10 and 16 minutes.
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Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to
the given statistics and confidence level. Round the margin of error to four decimal places
98% confidence; the sample size is 800. of which 40% are successes
The error E = ± 4.04 %
Sample data = ( p ).
success p = success percentage = 40 %
confidence interval CI = 98%
sample size n = 800
margin of error E:
The margin of error "E" for estimation of population proportion ( p ) is given by:
E = z - critical √(p(1-p)/n)
P ( Z < Z-critical ) = a/
a = 1 - CI
P ( Z < Z-critical ) = (1 - 0.98) / 2
P ( Z < Z-critical ) = 0.01
Z-critical = 2.33
The error E = ± 4.04 %
Thus, the correct answer is E=± 4.04 %
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In the figure, the angles are formed by a transversal and two parallel lines. Which angles seem to be congruent?
The angles are formed by a transversal and two parallel lines in the figure. By applying congruent angles and vertical opposite angle property, ∠1 ≅∠3 ≅ ∠5 ≅ ∠7; ∠2 ≅ ∠4 ≅ ∠6 ≅ ∠8. Therefore option B is correct.
Congruent angles are identical to each other and have the same measure. The angles formed by the transversal in corresponding corners are called corresponding angles and they are congruent.
Therefore, ∠1 ≅ ∠5, ∠3 ≅ ∠7----------(1)
At a vertex if two angles are opposite to each other, then they are vertically opposite angles, they are equal and congruent to each other.
Therefore, ∠1 ≅ ∠3, ∠5 ≅ ∠7----------(2)
Combining (1) and (2), we get:
∠1 ≅∠3 ≅ ∠5 ≅ ∠7
Similarly we can find,
∠2 ≅ ∠4 ≅ ∠6 ≅ ∠8.
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The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after 24
minutes of calls is $22.12, and the remaining credit after 63 minutes of calls is $17.44. What is the remaining credit after 91 minutes of calls?
The remaining credit after 91 minutes of calls is $16.76.
We are given that;
(24, 22.12) and (63, 17.44)
Now,
To find the slope and the y-intercept of the function. You can write your solution as:
Slope = (y2 - y1) / (x2 - x1) = (17.44 - 22.12) / (63 - 24) = -0.08 y-intercept = y - mx = 22.12 - (-0.08)(24) = 24.04 Equation: y = -0.08x + 24.04
To find the remaining credit after 91 minutes of calls, you need to substitute x = 91 in the equation and simplify. You can write your answer as:
y = -0.08(91) + 24.04 y = -7.28 + 24.04 y = 16.76
Therefore, by the intercept the answer will be $16.76.
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The table represents a quadratic function C(t).
t C(t)
−2 7
−1 4
0 3
1 4
2 7
What is the equation of C(t)?
C(t) = −(t − 3)2
C(t) = (t − 3)2
C(t) = −t2 + 3
C(t) = t2 + 3
The equation of the quadratic function C(t) is given as follows:
C(t) = t² + 3.
How to define the quadratic function given it's vertex?The quadratic function of vertex(h,k) is given by the rule presented as follows:
y = a(x - h)² + k
In which:
h is the x-coordinate of the vertex.k is the y-coordinate of the vertex.a is the leading coefficient.The vertex is the turning point of the function, where it changes from decreasing to increasing, or vice versa, hence:
(0,3).
Then:
y = at² + 3.
When x = 1, y = 4, hence the leading coefficient a is obtained as follows:
4 = a(1)² + 3
a = 1.
Hence the function is given as follows:
y = t² + 3.
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Select the correct answer.
Which expression is equivalent to the given expression?
(14x³y^-4) (4x^-5y^4)
OA. 56/x^2
OB. 56x^2y
OC. 56y/x^2
OD. 56x^2
please help i need the answer!!
Answer:
The correct answer is D. 56x^2.
find lim x approaches 3
f(x) = x^2 - 2
f(x) = -3x + 15. x> 3
The value of the limit of the function f(x) = x² - 2 is 7.
The value of the limit of the function f(x) = -3x + 15 is -6.
We have,
To evaluate the limit as x approaches 3, we need to find the limit of function f(x) as x approaches 3 from both sides of 3.
First, let's evaluate the limit from the left side of 3:
lim x → 3⁻ f(x) = lim x → 3⁻ (x^2 - 2)
Substituting x = 3 - h (where h approaches zero) gives:
lim h → 0⁺ [(3 - h)^2 - 2]
= lim h → 0⁺ [9 - 6h + h^2 - 2]
= lim h → 0⁺ [h^2 - 6h + 7]
= 7
(since the limit of a quadratic function as h approaches zero is the constant term)
Next, let's evaluate the limit from the right side of 3:
lim x → 3⁺ f(x)
= lim x → 3⁺ (-3x + 15)
= -6
Since the limit from the left side is not equal to the limit from the right side, the limit of f(x) as x approaches 3 does not exist.
Thus,
The value of the limit of the function f(x) = x² - 2 is 7.
The value of the limit of the function f(x) = -3x + 15 is -6.
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How to get the square root of a number?
Answer:
Step-by-step explanation:
What is the Formula for Calculating the Square Root of a Number? The square root of any number can be expressed using the formula: √y = y½. In other words, if a number has 1/2 as its exponent, it means we need to find the square root of the number.
In mathematics, the square root of a number is a value that, when multiplied by itself, gives the original number.
The square root of a number "a" is denoted by the symbol "√a" or "a^(1/2)." For example, the square root of 9 is 3 because 3 * 3 = 9.
If n‖m, find m∠1 + m∠2.
Answer:
80°
Step-by-step explanation:
You want the sum of angles 1 and 2 in the attached figure where line m ║ line n.
Vertical anglesVertical angles are congruent. This means angle 1 is 60°, and the unnumbered angle in triangle ABC at vertex A is 20°.
Alternate interior anglesWhere a transversal crosses parallel lines, alternate interior angles are congruent. This means angle 2 is congruent with the unnumbered interior angle at A, which we know is 20°.
Angle 1 is 60° and angle 2 is 20°. Their sum is ...
∠1 +∠2 = 60° +20° = 80°
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Please help!! I don’t understand trigonometric functions
The horizontal transformations are defined as follows:
cos(ax).
They are classified as follows:
Stretch if |a| < 1.Compression if |a| > 1.The vertical transformations are defined as follows:
acos(x).
They are classified as follows:
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PA HELP PO SA STATS TOPIC PO "RANDOM SAMPLING AND SAMPLING DISTRIBUTION" THANKYOU
1) Note that the population mean is 153.
2) there are 36 possible random samples of size two that can be selected from a population of nine.
How did we arrive at the above?1) Population Mean = (172 + 148 + 156 + 170 + 161 + 138 + 142 + 156 + 134) / 9
= 1377 / 9
Population Mean = 153
2) To get the number of possible random samples, we must use Combination whose equation is given as
nCr = n! / (r! (n-r)!)
nC2 = 9! / (2!(9-2)!)
= 9! / (2! 7!)
= (9 x 8 x 7!) / (2!7!)
= (9 x 8) / 2
= 36
Thus, the number of random samples that can be selected form a population of 9 is 36.
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Xavier drew a map of an island using a scale in which 2 inches represents 50 feet. The length of the island is 400 feet. What is the length of the island on the map in inches?
Answer:
16 in
Step-by-step explanation:
50 ft x 12 in/ft = 600 in
Scale factor: 2 : 600 = 1 : 300
x = length of island on the map
400 ft = 4800 in
1/300 = x/4800
x = 4800/300 = 16 in
Please someone help me 28th this, eleven people are entered in a race if there are no ties in how many ways can first and second place come?
The table describes the quadratic function h(x).
x h(x)
−3 −2
−2 −3
−1 −2
0 1
1 6
2 13
3 22
What is the equation of h(x) in vertex form?
h(x) = (x + 2)2 − 3
h(x) = (x + 1)2 − 2
h(x) = (x − 1)2 + 2
h(x) = (x − 2)2 + 3
The equation of h(x) in vertex form is given as follows:
h(x) = (x + 2)² - 3.
How to define the quadratic function given it's vertex?The quadratic function of vertex(h,k) is given by the rule presented as follows:
y = a(x - h)² + k
In which:
h is the x-coordinate of the vertex.k is the y-coordinate of the vertex.a is the leading coefficient.The vertex is the turning point of the function, where it changes from decreasing to increasing, or vice versa, hence it's coordinates are given as follows:
(-2,-3).
Then the equation is:
h(x) = a(x + 2)² - 3.
When x = 0, h(x) = 1, hence the leading coefficient a is obtained as follows:
1 = a(2)² - 3
4a = 4
a = 1.
Hence the equation is:
h(x) = (x + 2)² - 3.
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Given: Isosceles trapezoid ABCD with diagonals BD and AC Identify the missing reason in the proof.
The statement thet complete the proof of the congruent triangles is (a) SAS criterion
How to determine the statement thet complete the proof of the congruent trianglesFrom the question, we have the following parameters that can be used in our computation:
The incomplete proof
In the proof, we have
AD ≅ BC --- side length
DC ≅ DC --- side length
∠ADC ≅ ∠BCD -- angle
This means that the triangles are congruent by the SAS theorem
The SAS theorem is defined by "If two sides in one triangle are congruent to two sides in another triangle and the included angle in both are congruent, then the two triangles are congruent"
This means that they are congruent by the SAS congruent
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Answer: A. SAS criterion.
Step-by-step explanation: Angle : ∠ADC ≅ ∠BCD Side length : AD ≅ BC Side length : DC ≅ DC
Because of this △ADC ≅ △BCD by SAS criterion.
Solve A and B please
a. The standard deviation of the tuition is $150.
b. The shape of this distribution is a normal distribution, which is a bell-shaped curve.
How to calculate the value(a) The mean tuition is $100 per credit hour * 15 credit hours per semester + $150 lab fee = $1650 per semester.
The standard deviation of the tuition is l:
= ✓(100² + 150²) =
= ✓22500
= $150.
(b) The shape of this distribution is a normal distribution, which is a bell-shaped curve. The mean is the center of the distribution, and the standard deviation is the width of the distribution. The majority of the tuitions will be close to the mean, with fewer and fewer tuitions as you move further away from the mean.
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What do you know about the graphs of polynomials with positive end behavior compared to the graphs of polynomials with negative end behavior?
If "positive" end behavior:
1. The graph hits the x-axis
2. The arrows point in opposite directions
3. The arrows point in the same direction
4. The right arrow is up
5. The graph hits the y-axis
6. The right arrow is down
If "negative" end behavior:
1. The graph hits the x-axis
2. The right arrow is down
3. The graph hits the y-axis
4. The right arrow is up
5. The arrows point in the same direction
6. The arrows point in opposite directions
The correct statements are:
If "positive" end behaviour:
The arrows point in the same direction.
The right arrow is up.
The graph hits the y-axis.
If "negative" end behaviour:
The arrows point in opposite directions.
The right arrow is down.
The graph hits the X-axis.
In mathematics, a graph is a visual representation of a set of data, which consists of points, called vertices or nodes, and lines connecting them, called edges or arcs.
Graphs are often used to represent mathematical functions, data sets, or relationships between objects, and they can be used to model real-world phenomena.
Graphs can be drawn on a coordinate plane or in a more abstract form, and they can be used to analyze and understand complex systems and relationships.
The correct statements are:
If "positive" end behaviour:
The arrows point in the same direction.
The right arrow is up.
The graph hits the y-axis.
If "negative" end behaviour:
The arrows point in opposite directions.
The right arrow is down.
The graph hits the X-axis.
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Sam just bought a refrigerator for 1058. He paid 211.40 in a down payment and will pay the rest in 6 equal installments. How much does he need to pay for each installment?
The amount Sam needs to pay in each installment is $141.1
How much does he need to pay for each installment?From the question, we have the following parameters that can be used in our computation:
Cost of refrigerator = 1058
Down payment = 211.40
Number of equal installments = 6
Using the above as a guide, we have the following:
Each installment = (Cost of refrigerator - Down payment)/Number of equal installments
substitute the known values in the above equation, so, we have the following representation
Each installment = (1058 - 211.40)/6
Evaluate
Each installment = 141.1
Hence, the amount in each installment is $141.1
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I will give brainliest and ratings if you get this correct
1. The product of MG is as follows;
[tex]\left[\begin{array}{ccc}1&k_1+9&4k_2+36 \\2t_1&k_1t_1-17&3k_2-19t_1-11\\t_2+1&k_1-4t_2+5&k_2t_2-8\end{array}\right][/tex]
2. The values are k₁ = -9, k₂ = -9, t₁ = 0 and t₂ = -1 given that G = M⁻¹
How do we find the product MG?Matrix M and matrix G are given as
M = [1, 4, 5; t₁, 3, -1; 1, t₂, 1] and
G = [2, k₁, -19; 1, -4, k₂; -1, 5, 11]
MG becomes
1×2 + 4×1 + 5×-1 1k₁+4×-4+ 5×5 1×-19+4k₂+5×11
t₁×2+3×1+-1×-1 t₁k₁+3×-4+-1×5 t₁×-19+3k₂+-1×11
1×2+t₂×1+1×-1 1k₁+t₂×-4+-1×5 1×-19+t₂k₂+1×11
=
1 k₁+9 4k₂+36
2t₁ k₁t₁-17 3k₂-19t₁-11
t₂+1 k₁-4t₂+5 k₂t₂-8
To solve G = M⁻¹ we know it is an identity matrix
I = | 1 0 0 |
| 0 1 0 |
| 0 0 1 |
We can equate the elements of MG and I to find the values of t₁, t₂, k₁, and k₂:
1 = 1, k₁+9 = 0, 4k₂+36 = 0
2t₁ = 0 k₁t₁-17 = 1 3k₂-19t₁-11 = 0
t₂+1 = 0 k₁-4t₂+5 = 0 k₂t₂-8 = 1
k₁+9 = 0 4k₂+36 = 0 2t₁ = 0 t₂+1 = 0
k₁ = -9 k₂ = -9 t₁ = 0 t₂ = -1
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Theprofit(indollars)earnedbysellingwappletreesisrepresentedby w2 − 4w + 14. The profit (in dollars) earned by selling w pear trees is
represented by 2w + 10. Write a polynomial that represents how much more profit is earned by selling w apple trees than w pear trees.
[tex]w^2 - 6w + 4[/tex] is a polynomial that represents how much more profit is earned by selling w apple trees than w pear trees.
The profit earned by selling w pear trees is 2w + 10
To find the difference in profit, we need to subtract the profit earned by selling w pear trees from the profit earned by selling w apple trees:
[tex](w^2 - 4w + 14) - (2w + 10)[/tex]
Simplifying the expression:
[tex]w^2 - 6w + 4[/tex]
Therefore, the polynomial that represents how much more profit is earned by selling w apple trees than w pear trees is [tex]w^2 - 6w + 4[/tex].
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Calculator What is the area of a sector with a central angle of 40° and a radius of 16.7 ft? Use 3.14 for T and round your final answer to the nearest hundredth. Enter your answer as a decimal in the box. ft² B
The area of the sector is approximately 9.25 ft².
We have,
The formula for the area of a sector.
A = (θ/360°) × πr²
where A is the area of the sector, θ is the central angle in degrees, and r is the radius.
Substituting the given values.
A = (40°/360°) × 3.14 × (16.7 ft)²
A = 0.1111 × 3.14 × 278.89 ft²
A = 9.2465 ft²
Rounding to the nearest hundredth.
A ≈ 9.25 ft²
Therefore,
The area of the sector is approximately 9.25 ft².
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Dina draws marbles of the same size and shape out of a bag. The probability of randomly drawing a green marble is 30%. The probability of randomly drawing a yellow marble is 25%. What is the probability Dina will randomly draw a marble that is not green, replace it, then randomly draw a yellow marble? Enter your answer as a %.
After analysing the given data we conclude that the probability that Dina will randomly choose that is not green and change it and again randomly choose a marble that is yellow is 17.5%.
The given probability of Dina drawing a green marble is 30%. Then, the probability of her not drawing a green marble is 70%. It can be said that probability of her drawing a yellow marble is 25%. Hence, the probability of her not drawing a yellow marble is 75%.
The probability of Dina drawing a marble that is not green and then replacing it is
70% × 100% = 70%.
The probability of her then drawing a yellow marble is 25%. Therefore, the probability of Dina randomly drawing a marble that is not green, replace it, then randomly draw a yellow marble is
70% × 25% = 1750
1750× 100 = 17.5%.
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If sin 0 - cos 0 = 1, prove that sin 0 + cos 0=1.
The trigonometric value equation is solved and sin ( 0 )° + cos ( 0 )° = 1
Given data ,
Let the trigonometric relation be represented as A
Now , the value of A is
sin ( 0 )° - cos ( 0 )° = 1
From the trigonometric relation , we get
sin 0 = 0
cos 0 = 1
So , the equation is
sin ( 0 )° + cos ( 0 )° = 1
Hence , the equation is solved
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solve the following for x 2log a x- log a(x-1) =log a(x-2)
The solution to the equation [tex]2log_a(x) - log_a(x-1) = log_a(x-2)[/tex] is
x = 2/3.
To solve the equation [tex]2log_a(x) - log_a(x-1) = log_a(x-2)[/tex] for x, We can employ algebraic manipulation and logarithmic characteristics.
Apply logarithmic properties.
Using the logarithmic property[tex]log_a(b) - log_a(c) = log_a(b/c),[/tex] we can rewrite the equation as:
[tex]log_a(x^2) - log_a(x-1) = log_a(x-2).[/tex]
Combine the logarithms.
Applying the logarithmic property [tex]log_a(b) - log_a(c) = log_a(b/c),[/tex] we can combine the logarithms on the left-hand side:
[tex]log_a[(x^2)/(x-1)] = log_a(x-2).[/tex]
Take the logarithms out.
We can do away with the logarithms because the base of the equation is the same.
[tex](x^2)/(x-1) = x-2.[/tex]
Streamline the equation.
We can eliminate the denominator and simplify the equation by multiplying both sides by (x-1):
[tex]x^2 = (x-2)(x-1).[/tex]
Expand and simplify.
Expanding the right-hand side, we have:
[tex]x^2 = x^2 - 3x + 2[/tex]
Rearrange the equation.
Rearranging the equation, we get:
0 = -3x + 2.
Do the x math.
We must isolate x on one side of the equation in order to find its value. Taking 2 away from both sides:
3x = 2.
Finally, divide both sides by 3:
x = 2/3.
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Refer to the painting.
110°
7x
Write an equation that can be used to find the value of x.
An equation that can be used to find the value of x include the following: 110° + 7x = 180°.
What is a supplementary angle?In Mathematics and Geometry, a supplementary angle simply refers to two (2) angles or arc whose sum is equal to 180 degrees.
Additionally, the sum of all of the angles on a straight line is always equal to 180 degrees. In this scenario, we can reasonably infer and logically deduce that the sum of the given angles are supplementary angles:
110 + 7x = 180°
7x = 180° - 110°
7x = 70°
x = 70°/7
x = 10°
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
When the sun is at its highest point in the sky, Hong goes to fly a kite in a flat field. He lets out 42.9 feet of string, and the spool of string is 3.4 feet above the ground. The shadow that the kite makes (directly below the kite on the ground) is 16.5 feet away from Hong. How high is the kite off the ground? Round your answer to two decimal places.
The height of the kite off the ground is approximately 17.87 feet rounded to two decimal places.
To solve the problem can use similar triangles.
Let's draw a diagram:
A
|\
| \
h | \ x
| \
|____\
d B
Point A represents the kite, point B represents the tip of the kite's shadow on the ground and point D represents the point directly below the spool of string on the ground.
The height of the kite represented by h.
The length of the string is 42.9 feet so the distance from point A to point D is also 42.9 feet.
The distance from point B to point D is 16.5 feet.
These two lengths to find the length of segment AB:
AB/AD = BD/AD
AB/42.9 = 16.5/42.9
AB = 16.5
So AB is 16.5 feet.
Now we can use the similar triangles to find h.
We have:
h/x = AB/AD
h/x = 16.5/42.9
h = x × 16.5/42.9
We need to find x.
The spool of string is 3.4 feet above the ground and we know that the kite is directly above the spool when it is at its highest point in the sky.
So the height of the kite above the ground is the same as the height of the spool above the ground plus the length of string that has been let out:
x = 3.4 + 42.9
= 46.3
Now we can substitute this value of x into the previous equation to find h:
h = 46.3 × 16.5/42.9
= 17.87
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Prove: If A and B are m × n matrices such that Ax = Bx for all x ∈ R
n, then A = B.
From matrix property it can be showed that A=B.
Given,
If A,B and x are matrices with x≠0 and AX=BX
Now,
X must be non-singular matrix because
A[tex]XX^{-1}[/tex]=B[tex]XX^{-1}[/tex]
AI = BI
= I( identity matrix )
⇒A = B
Hence Proved, A = B .
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Type in the parent function for a quadratic equation to make your parabola go through the points shown
The parent function for the quadratic equation is y = x²
How to determine the parent function for the quadratic equationFrom the question, we have the following parameters that can be used in our computation:
The graph
From the graph, we have the following points
vertex = (0, 0)
Points = (±1, 1) and (±2, 4)
The equation for the quadratic function is represented as
y = a(x - h)² + k
Where vertex = (h, k)
So, we have
y = a(x - 0)² + 0
Evaluate
y = ax²
Using the points, we have
a(1)² = 1
Evaluate
a = 1
So, we have
y = x²
Hence, the parent function for the quadratic equation is y = x²
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solve by using elimination. 12x + 36y = −3
−12x − 36y = 0
The given system of equations has no solution.
Given that a system of equations, 12x + 36y = −3 and −12x − 36y = 0, we need to solve it,
We know for a system of equations =
a₁x + b₁y = c₁ and a₂x + b₂y = c₂
If a₁ / a₂ = b₁ / b₂ = c₁ / c₂ then the system has infinite solutions.
If a₁ / a₂ = b₁ / b₂ ≠ c₁ / c₂ then the system has no solutions.
If a₁ / a₂ ≠ b₁ / b₂ then the system has a unique solution.
comparing the coefficients given,
-12/12 = -1
-36/36 = -1
-3/0 = -3
We get here the condition of a₁ / a₂ ≠ b₁ / b₂, which means that the system has no solution.
Hence the given system of equations has no solution.
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Helppppp pleaseeeeeeee
To achieve a 1 in row 1, column 1, divide row 1 by 4 in the given matrix, resulting in the updated matrix. This row operation preserves the system of linear equations represented by the matrix.
To get a 1 in row 1, column 1 of the given matrix, you can perform the following valid row operation:
R1 = (1/4) * R1
This operation scales row 1 by a factor of 1/4, resulting in the new matrix:
1 , -3/4 , -43/4
3 , -2 , -30
By dividing each element in row 1 by 4, the value in row 1, column 1 becomes 1. This row operation maintains the equivalence of the system of linear equations represented by the matrix.
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The length of a rectangle measures two more than three times the width if the area is 40 ft.² find the dimensions of the rectangle
Answer:Therefore, the dimensions of the rectangle are 14 ft by 4 ft.
Let's use variables to represent the length and width of the rectangle. We know from the problem that:Length = 3 times the width + 2
Area = 40 ft²We can use the formula for the area of a rectangle to set up an equation:Area = length x widthSubstituting in the values we have:40 = (3w + 2)wExpanding the brackets and simplifying:40 = 3w² + 2wRearranging into a quadratic equation form:3w² + 2w - 40 = 0We can solve for w using the quadratic formula:w = (-2 ± sqrt(2² - 4(3)(-40))) / (2 x 3)
w = (-2 ± sqrt(484)) / 6
w = (-2 ± 22) / 6The two possible solutions are w = 4 and w = -6.67. Since width cannot be negative, we take the positive solution: w = 4 ft.To find the length, we can use the formula we established earlier:Length = 3w + 2
Length = 3(4) + 2
Length = 14 ft