Answer: The answer is D
Step-by-step explanation:
I know this because I did this and my teacher gave me the answer
using the graph in the picture:
1. PQ is a line which is parallel to the y-axis. Find the length of PQ
The point on the y-axis is on the line that passes through point r and is parallel to line PQ is; (0, 2/3)
To find the point on the y-axis that lies on the line passing through point r and is parallel to line pq, we need to first find the slope of line pq.
Substituting the given points, we get:
slope = (-1 - (-3))/(3 - (-3)) = 2/6 = 1/3
Since the line passing through point r is parallel to line pq, it will have the same slope as line pq.
The line passing through point r with slope 1/3.
Using a point-slope form of the equation of a line;
y - (-2) = 1/3(x - 1)
y = 1/3x + 2/3
So, the line passing through point r with slope 1/3 is;
y = 1/3x + 2/3.
y = 1/3(0) + 2/3 = 2/3
therefore, the answer is (0,2/3 )
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fraction form: star 1/6 decimal: 0.1667 percentage %:____
fraction form: circle 3/16 decimal: ____ percentange %:____
fraction form: triangle 1/16 decimal: ____ percentage %:_____
fraction form: cylinder 3/16 decimal: _____ percentage %:_____
fraction form: heart 8/16 decimal: ______ percentage %:______
please help me :)
Star: 0.1667, 16.67%; Circle: 0.1875, 18.75%; Triangle: 0.0625, 6.25%; Cylinder: 0.1875, 18.75%; Heart: 0.5, 50%.
We have,
Fraction form: star 1/6
Decimal: 0.1667
Percentage %: 16.67%
Fraction form: circle 3/16
Decimal: 0.1875
Percentage %: 18.75%
Fraction form: triangle 1/16
Decimal: 0.0625
Percentage %: 6.25%
Fraction form: cylinder 3/16
Decimal: 0.1875
Percentage %: 18.75%
Fraction form: heart 8/16
Decimal: 0.5
Percentage %: 50%
Thus,
Star: 0.1667, 16.67%; Circle: 0.1875, 18.75%; Triangle: 0.0625, 6.25%; Cylinder: 0.1875, 18.75%; Heart: 0.5, 50%.
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The equations of the graphs above are f(x) = a/x + p + q and
g(x) = b^x + c
(1) For which values of x is
a/x + p = b^x + c
(2) For which values of x is b^x + c - a/x + p <= q?
(3) For which values of x is f(x) <= g(x)?
(4) Write down the co-ordinates of the x and y intercepts of f .
(5) What are the equations of the asymptotes of f .
(1) To find the values of x that satisfy the equation a/x + p = b^x + c, you would need specific values for a, b, c, p, and q. Without these values, we cannot determine the exact solutions.
(2) To find the values of x that satisfy the inequality b^x + c - a/x + p <= q, we would need the specific values of a, b, c, p, and q. Without these values, we cannot determine the exact solutions.
(3) To determine the values of x for which f(x) <= g(x), we need the specific values of a, b, c, p, and q, as well as the shapes of the graphs. Without this information, we cannot provide a specific answer.
(4) The x-intercept of a function f(x) is the point where the graph intersects the x-axis. To find the x-intercept of f(x) = a/x + p + q, we need the specific value of a. Similarly, the y-intercept is the point where the graph intersects the y-axis, and we need additional information to determine its coordinates.
(5) The equation of an asymptote depends on the behavior of the function and the given equations. Without specific details about the graphs and their behavior, we cannot determine the equations of the asymptotes.
I had ⅒of the cake
my friend had ⅑ of the cake
how much did we have?
Given m∥n, find the value of x.
Answer:
x = 11
Step-by-step explanation:
The two angles measuring (7x + 14)° and (9x - 8)° are corresponding angles, which are always congruent to each other and thus equal to each other.
Step 1: Thus, we can find the value of x by setting the two angles equal to each other:
7x + 14 = 9x - 8
7x + 22 = 9x
22 = 2x
11 = x
Optional Step 2: We can check that we've found the correct answer by plugging in 11 for x in both (7x + 14) and (9x - 8) and checking that we get the same number:
7(11) + 14 = 9(11) - 8
77 + 14 = 99 - 8
91 = 91
Is the square root of 56 rational or irrational
Answer:
Irrational
Step-by-step explanation:
[tex]\sqrt{56} = 7.48331477355[/tex]
so the decimal is not a repeating pattern so it is irrational
Which value from the set {3/4,1,3/2,3 3/4} is a solution to the equation x+3/2=2 1/4?
To make a room appear larger
hello
the answer to the question is:
[tex] \sin(s) = \frac{tu}{x} \\ \sin(24) = \frac{22.5}{x} \\ x = 25[/tex]
The height of a horse can be measured in hands, which is the distance across an adult's palm.
A horse measures 14 hands tall. If a hand is about foot, what is the height of the horse in feet?
O A) 43 ft
O B) 4 ft
0 95 ft
OD)9 ft
The calculated height of the horse in feet is (c) 5 feet
Calculating the height of the horse in feet?From the question, we have the following parameters that can be used in our computation:
Horse = 14 hands tall
By conversion, a hands tall is about 1/3 feet
Using the above as a guide, we have the following:
Horse = 14 * 1/3 feet
Evaluate the product
So, we have
Horse = 4.67 feet
When apprioximated, we have
Horse = 5 feet
Hence, the height of the horse in feet is (c) 5 feet
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Please help me for 15 points
I need help with my work someone please thank you
Rate of change of linear function is increases by 12m/s.
Given values of time and distance are linearly increasing in nature.
When time is 0 seconds , distance is 0 m .
When time is 1 seconds , distance is 12 m .
When time is 2 seconds , distance is 24 m .
When time is 3 seconds , distance is 36 m .
Rate of change is denoted by dy/dx.
Calculating dy/dx,
Function 1:
dy/dx= 12-0/1-0
dy/dx= 12 m/s.
Function 2:
dy/dx= 24-12/2-1
dy/dx = 12 m/s.
Function 3:
dy/dx= 36-24/3-2
dy/dx= 12 m/s.
Hence the linear function is increasing with rate 12m/s.
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(x + [tex]\sqrt{7}[/tex] ) (x - [tex]\sqrt{7}[/tex] )
Answer:
x^2 - 7
Step-by-step explanation:
To simplify the expression (x + √7)(x - √7), we can use the distributive property of multiplication:
(x + √7)(x - √7) = x(x) + x(-√7) + √7(x) + √7(-√7)
Now, let's simplify each term:
x(x) = x^2
x(-√7) = -x√7
√7(x) = √7x
√7(-√7) = -7
Combining all the terms:
x^2 - x√7 + √7x - 7
We can rearrange the terms:
x^2 + (√7x - x√7) - 7
Notice that (√7x - x√7) simplifies to 0 since the two terms cancel each other out. Therefore, we have:
x^2 - 7
Thus, the simplified form of (x + √7)(x - √7) is x^2 - 7.
Hope this helps!
Paquita has 63 index cards. She uses
57 of them for a project. How many
index cards does Paquita have now?
The number of index cards that Paquita has now is 6.
Given that,
Paquita has 63 index cards.
She uses 57 of them for a project.
We have to find the number of cards left with her.
It is clear that, we have to subtract the total number of cards with the number of cards she used for the project.
Total number of index cards that Paquita has= 63
Number of cards she used for the project = 57
Number of cards left with her = 63 - 57
= 6
Hence the number of cards that Paquita has now is 6.
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15. Solve the compound inequality.
4x>-16 or 6x≤-48
The solution to the Compound inequality 4x > -16 or 6x ≤ -48 is x > -4 or x ≤ -8, expressed either graphically or in interval notation.
The compound inequality 4x > -16 or 6x ≤ -48, we will solve each inequality separately and then combine the solutions.
1. Solving the inequality 4x > -16:
Dividing both sides of the inequality by 4 (since it is a positive number), we have:
x > -16/4
x > -4
2. Solving the inequality 6x ≤ -48:
Dividing both sides of the inequality by 6 (since it is a positive number), we have:
x ≤ -48/6
x ≤ -8
Now, let's combine the solutions:
The solution to the compound inequality 4x > -16 or 6x ≤ -48 is the combination of the individual solutions.
Since it is an "or" compound inequality, we consider the values that satisfy either of the two inequalities.
The solution is x > -4 or x ≤ -8.
Graphically, this represents two separate intervals on the number line. The interval for x > -4 is shaded to the right of -4, and the interval for x ≤ -8 is shaded to the left of -8.
In interval notation, the solution is (-∞, -8] ∪ (-4, +∞), where (-∞, -8] represents all values less than or equal to -8, and (-4, +∞) represents all values greater than -4.
the solution to the compound inequality 4x > -16 or 6x ≤ -48 is x > -4 or x ≤ -8, expressed either graphically or in interval notation.
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You are hoping to start a business and plan to invent a product to sell. If
your presentation is successful, "the Dragons" will invest in your product and
you will be able to start your business. Your first step is to come up with a
product to sell. Consider the following:
The amount it will cost to start-up your business
-The amount it will cost to make each product
-The amount you are going to sell your product for
Using this data, you will create two equations.
Equation 1: Cost: y = mx + b
Where: y = total amount of money it will cost you
m = cost for producing 'x' amount of products
b= fixed start-up cost
Equation 2: revenue: y = (price) x
Where: y = total amount of money you will make
Aa
(price) = the amount you are charging for each product
x = number of products you will sell
Write down your system of linear equations.
Solve your system of equations using the three methods that we have
discussed in class: the Graphing method, the Substitution method, and the
Elimination method.
Worth 150 points in my class, pls help ??
Equation 1: Cost: y = mx + b
Where: y = total amount of money it will cost you
m = cost for producing 'x' amount of products
b = fixed start-up cost
Equation 2: Revenue: y = (price) x
Where: y = total amount of money you will make
(price) = the amount you are charging for each product
x = number of products you will sell
To solve this system of linear equations using the three methods discussed in class, we need to first set the two equations equal to each other:
mx + b = (price) x
We can rearrange this equation to solve for x:
mx - (price) x = -b
x(m - (price)) = -b
x = -b/(m - (price))
Now that we have solved for x, we can substitute this value into either of the original equations to solve for y. Let's use Equation 2:
y = (price) x
y = (price) (-b/(m - (price)))
y = -(price) b/(m - (price))
Therefore, the system of linear equations is:
Equation 1: y = mx + b
Equation 2: y = (price) x
Using the Graphing method, we can plot the two equations on a graph and find the point of intersection, which represents the solution to the system. However, since we donot have specific values for m, b, and the price, we cannot graph the equations.
Using the Substitution method, we can solve one of the equations for y and substitute it into the other equation. Let's solve Equation 1 for y:
y = mx + b
Now we can substitute this expression for y in Equation 2:
mx + b = (price) x
Simplifying this equation, we get:
(mx - (price) x) = -b
x(m - (price)) = -b
x = -b/(m - (price))
Now that we have solved for x, we can substitute this value back into either of the original equations to solve for y. Let's use Equation 1:
y = mx + b
y = m(-b/(m - (price))) + b
y = (mb/(price - m))
Therefore, the solution to the system of linear equations is:
x = -b/(m - (price))
y = (mb/(price - m))
Using the Elimination method, we can multiply Equation 1 by (price) and Equation 2 by -m, and then add the two equations together to eliminate y:
(price) y = (price)mx + (price) b
-m y = -(m price) x
(price - m) y = (price)mx - (m price) x + (price) b
(price - m) y = x((priceSorry, it seems that the last part of the equation got cut off in my previous response. Here is the correct version:
Using the Elimination method, we can multiply Equation 1 by (price) and Equation 2 by -m, and then add the two equations together to eliminate y:
(price) y = (price)mx + (price) b
-m y = -(m price) x
(price - m) y = x((price) - m) + (price) b
Now we can solve for y:
y = [x((price) - m) + (price) b] / (price - m)
And we can solve for x by using either Equation 1 or Equation 2:
x = -b/(m - (price))
Therefore, the solution to the system of linear equations is:
x = -b/(m - (price))
y = [x((price) - m) + (price) b] / (price - m)
Again, please note that these equations are general formulas and do not have specific values for m, b, and the price. You will need to substitute specific values into the equations to find the numerical solution.
the third and fifth terms of an exponential sequence of a positive terms are 12 and 5.3333 respectively .find the:common ratio and the first term.
The common ratio and the first term of the exponential sequence are 2.25 and 1.29 respectively.
The third and fifth terms of an exponential sequence of a positive terms are 12 and 5.3333 respectively.
The common ratio (r) of an exponential sequence is found by dividing any term by the previous term.
Therefore, r = 12/5.333 = 2.25
The first term can be found using the formula aₙ = arⁿ⁻¹.
Since we know the third term (a₃ = 12) and the common ratio (r = 2.25), the first terma₁ can be calculated as follows:
a₁ = a₃/r³ = 12/2.253 = 1.29
Hence, the common ratio and the first term of the exponential sequence are 2.25 and 1.29 respectively.
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Please answer this question
The expression in ascending order is [tex]e^{log4} < log_326 < log_233 < log_22^6[/tex].
We have,
Using a log and exponent calculator we get,
log 4 = 0.60
So,
[tex]e^{log 4}[/tex] = [tex]e^{0.60}[/tex] = 1.82
[tex]log_233[/tex] = 5.044
[tex]log_22^6[/tex] = 6
[tex]log_326[/tex] = 2.97
Now,
Arranging from least to greatest:
[tex]e^{log4} < log_326 < log_233 < log_22^6[/tex]
Thus,
The expression in ascending order is [tex]e^{log4} < log_326 < log_233 < log_22^6[/tex].
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Find the product (3x+4)(x-2)
Answer:
3x²-2x-8
Step-by-step explanation:
(3x+4)(x-2)=
3x²-6x+4x-8=
3x²-2x-8
f(x)=x^2-8x+44 in vertex form
Answer:
[tex]f(x)=(x-4)^2+28[/tex]
Step-by-step explanation:
Here are the steps to convert the quadratic function [tex]f(x)=x^2-8x+44[/tex] into vertex form:
Step 1: Group the [tex]x[/tex] terms together:
[tex]f(x)=(x^2-8x)+44[/tex]
Step 2: Complete the square within the parentheses by adding and subtracting the square of half the coefficient of the [tex]x[/tex] term:
[tex]f(x)=(x^2-8x+16)-16+44[/tex]
Step 3: Rearrange the expression:
[tex]f(x)=(x^2-8x+16)-16+44[/tex]
Step 4: Factor the perfect square trinomial [tex](x^2-8x+16)[/tex]:
[tex]f(x)=(x-4)^2-16+44[/tex]
Step 5: Simplify and combine constants:
[tex]f(x)=(x-4)^2+28[/tex]
Therefore, the quadratic function [tex]f(x)=x^2-8x+44[/tex] in vertex form is [tex]f(x)=(x-4)^2+28.[/tex] The vertex of the parabola is located at the point [tex](4,28)[/tex].
Where is probability, data, trends, likelihoods and/or statistics used in veterinarian? Be specific and explain.
Probability, data, trends, likelihoods, and statistics are used in various aspects of veterinary medicine. Here are some examples:
Diagnosis: Veterinarians use probability and statistical analysis to diagnose diseases in animals. For example, they may use Bayesian analysis to estimate the probability of a particular disease based on the animal's symptoms, medical history, and test results.
Treatment: Veterinarians use data and trends to develop treatment plans for animals. They may use statistical analysis to evaluate the effectiveness of different treatments and to identify which treatments are most likely to be successful.
Epidemiology: Veterinarians use statistics and likelihoods to study the occurrence and spread of diseases in animal populations. They may use surveillance data to identify outbreaks of diseases and to track their spread over time.
Research: Veterinarians perform research on animal health and disease using statistical analysis to interpret their findings. They may use experimental design and statistical methods to test the efficacy of new drugs or treatments, or to identify risk factors for certain diseases.
Public health: Veterinarians work to protect public health by monitoring animal diseases that can be transmitted to humans. They may use statistical analysis to identify trends in disease incidence or to evaluate the effectiveness of public health interventions.
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Find the product by suitable rearrangement 8 x453 x125
Answer:
The product of 8 * 453 * 125 is 453000.
Step-by-step explanation:
We can rearrange the factors to make the multiplication easier.
For example, we can group the 8 and the 125 together to get 8 * 125 = 1000. We can then multiply this by 453 to get 453000.
Another way to rearrange the factors is to group the 453 and the 125 together to get 453 * 125 = 56625. We can then multiply this by 8 to get 453000.
No matter how we rearrange the factors, the product will always be 453000.
A bag contains 6 red,8 black and 10 yellow Identical beads.Two beads are picked at random one after the other,without replacement. Find the probability that:
A. Both are red
B. One is black and the other yellow
Answer:
A. The probability that both beads are red is 5/92.
B. The probability that one bead is black and the other is yellow is 6/23.
Step-by-step explanation: To find the probabilities, we need to calculate the total number of possible outcomes and the number of favorable outcomes for each scenario.
A. Both beads are red:
Total number of beads = 6 + 8 + 10 = 24
The first bead can be any of the 24 beads. After picking the first bead, there will be 5 red beads left out of the remaining 23 beads. Thus, the probability of picking a red bead is:
P(Red on first pick) = 6/24 = 1/4
For the second pick, there will be one less bead, and one less red bead. Therefore, the probability of picking another red bead is:
P(Red on second pick) = 5/23
To find the probability of both events occurring, we multiply the probabilities together:
P(Both red) = P(Red on first pick) * P(Red on second pick)
= (1/4) * (5/23)
= 5/92
Therefore, the probability that both beads are red is 5/92.
B. One bead is black and the other is yellow:
Total number of beads = 24 (same as before)
The first bead can be any of the 24 beads. After picking the first bead, there will be 8 black beads and 10 yellow beads remaining. Thus, the probability of picking a black bead is:
P(Black on first pick) = 8/24 = 1/3
For the second pick, there will be one less bead, and if the first bead was black, there will be 10 yellow beads left. If the first bead was yellow, there will be 8 black beads left. Therefore, the probability of picking a yellow bead after a black bead is:
P(Yellow on second pick after black) = 10/23
However, we also need to consider the case when the first bead is yellow and the second bead is black. In that case, the probability is:
P(Black on second pick after yellow) = 8/23
To find the probability of either event occurring (black then yellow or yellow then black), we add the probabilities together:
P(One black and one yellow) = P(Black on first pick) * P(Yellow on second pick after black) + P(Yellow on first pick) * P(Black on second pick after yellow)
= (1/3) * (10/23) + (1/3) * (8/23)
= 10/69 + 8/69
= 18/69
= 6/23
Therefore, the probability that one bead is black and the other is yellow is 6/23.
To summarize:
A. The probability that both beads are red is 5/92.
B. The probability that one bead is black and the other is yellow is 6/23.
A college entrance exam company determined that a score of 23 on the mathematics portion of the exam suggests that a student is ready for college level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 200 students who completed this core set of courses results in a mean math score of 23.3 on the college entrance exam with a standard deviation of 3.2. Do these results suggest that students who complete the core curriculum are ready for college level mathematics. That is, are they scoring above 23 on the mathematics portion of the exam? Complete parts a) through d)
The scoring above 23 on the mathematics portion of the exam is 1.327.
We are given that;
Total students = 200
Now,
The formula for the test statistic is:
t = (x - u) / (s / n)
where X is the sample mean, u is the hypothesized population mean, s is the sample standard deviation, and n is the sample size.
Plugging in the values given in the question, we get:
[tex]t = (23.3 - 23) / (3.2 / √200)[/tex]
t = 0.3 / 0.226 t = 1.327
Therefore, by Statistics the answer will be 1.327.
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69 /94>
157%
11. Make sense of problems. Find the
scale factor and the unknown side lengths
for each pair of similar triangles.
a. AABC – ADEF
Scale factor
AC =
AB=
DE=-
A
C 6
B
D
13
F
12
-a
E
The complete values are:
1. Scale factor = 1/2
DE = 17.69
AC = 6.5 unit
AB = 8.845 unit
2. Scale factor = 2/3
UT = 11.34 unit
YZ = 12 unit
XY = 17 unit
1. In ΔACB and ΔDFE
Using Pythagoras
DE = √13² + 12²
DE = √169 + 144
DE = √313
DE = 17.69
AC = 6.5 unit
AB = 8.845 unit
and, Scale factor = 6/12 = 1/2
2. In ΔTUV and ΔXYZ
Scale factor = 8/12 = 2/3
Using Pythagoras
UT= √64 + 64
UT = 11.34 unit
So, YZ = 8 x 3/2 = 12
and, XY = 11.34 x 3/2 = 17
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i need help 5x2+5x-30=0
Hello !
Answer:
[tex]\boxed{\sf x=2\ or\ x=-3}[/tex]
Step-by-step explanation:
[tex]\sf 5x^2+5x-30[/tex]
This equation is a quadratic equation in the form ax²+bx+c=0
The solution of this equation is given by the quadratic formula :
[tex]\sf x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]
There are 3 cases depending on the values of the discriminant :
[tex]b^2-4ac > 0[/tex] : 2 real roots[tex]b^2-4ac = 0[/tex] : no real root[tex]b^2-4ac < 0[/tex] : no real rootLet's calculate the discriminant :
[tex]\sf b^2-4ac=5^2-4\times5\times(-30)=625 > 0[/tex]
There are 2 real roots.
Now let's use the quadratic formula to find the two roots.
[tex]\sf x=\frac{-5\pm\sqrt{5^2-4\times5\times(-30)}}{2\times5}\\x=\frac{-5\pm\sqrt{625}}{10} \\x_1=\frac{-5+\sqrt{625}}{10}=2\\x_2=\frac{-5-\sqrt{625}}{10}=-3\\\boxed{\sf x=2\ or\ x=-3}[/tex]
Have a nice day ;)
...........................................................
Answer:
g'(1,-5)
Step-by-step explanation:
Rule
(x,y) → (y -x)
(-5,-1) → (-1,5)
Helping in the name of Jesus.
Answer:
For new coordinates of each point, we can use the following formula:
(x, y) [tex]\longrightarrow[/tex] (y, -x)
To rotate a point 90 degrees clockwise about the origin, we swap the x and y coordinates and negate the x coordinate.
Therefore, the rotated points are:
G(-5,-1) [tex]\longrightarrow[/tex] G'(-1, 5)
H(-3,-2) [tex]\longrightarrow[/tex] H'(-2, 3)
J(-3,-5) [tex]\longrightarrow[/tex] J'(-5, 3)
K(-5,-4) [tex]\longrightarrow[/tex] K'(-4, 5)
Therefore, The vertex of G is (-1,5)
worth 45 points
pls answer
The time when the movie finishes is 19:37 using the 24-hour clock.
Sebastian started watching the movie at 17:30. The movie has a duration of 1 hour 54 minutes, which is equal to 1 + 54/60 = 1.9 hours.
Adding this duration to the start time gives:
17:30 + 1.9 hours = 19:24
This would be the time when the movie finishes if Sebastian didn't pause it. However, he paused it for 13 minutes, so we need to add this pause time to the finish time.
To do this, we can convert the pause time to hours and add it to the finish time:
13 minutes = 13/60 hours
19:24 + 13/60 hours = 19:37
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WHAT IS THE PROBABILITY THAT BOTH EVENTS WILL OCCUR?! FIRST, FIND THE PROBABILITY OF EVENT A. TWO DICE ARE ROLLED. EVENT A: THE FIRST DIE IS A 4 OR LESS. EVENT B: THE SECOND DIE IS EVEN. PLEASE FIND SEPERATE A & B AND THEN BOTH EVENTS OCCURING. SHOW UR WORK. BRAINLY FOR BEST ANSWER THAT SHOWS WORK. TYSM! IF YOU CAN ALSO HELP ME ON THE REST OF MY ASSIGNMENT I WOULD BE IN TABOO IF SO. I HAVE A D- IN THE CLASS AND I NEED HELP!!!!
The probability of events A and B occurring is given as follows:
P(A and B) = 1/3.
How to calculate a probability?The parameters that are needed to calculate a probability are given as follows:
Number of desired outcomes in the context of a problem/experiment.Number of total outcomes in the context of a problem/experiment.Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes.
For each event, the probability is given as follows:
Event A: 4 or less -> 2/3 (4 out of 6 numbers are 4 or less, 4/6 = 2/3).Event B: even number -> 3/6 = 1/2.As the events are independent, the probability of both events happening is given as follows:
P(A and B) = 2/3 x 1/2
P(A and B) = 1/3.
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Answer:
30 or 12/13
Step-by-step explanation:
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A no Subtracted from 13 gives -15
When a number subtracted from 13 gives -15 then the number is -2.
We have to find the number which is subtracted from 13 gives -15.
Let x be the unknown number.
By the given information, let us form a equation:
x-13=-15
We have to solve for x:
Add 13 on both sides of the equation:
x=-15+13
x=-2
Hence, -2 is the unknown number.
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