Answer: 14 degrees.
Step-by-step explanation: The sum of the measures of the interior angles of a triangle is always 180 degrees. Therefore, if we know the measures of two of the interior angles of a triangle, we can use this fact to find the measure of the third angle.
In this case, we are given that two of the interior angles of the triangle have measures of 54 and 112 degrees. We can use this information to find the measure of the third angle as follows:
180 degrees = 54 degrees + 112 degrees + x
180 degrees = 166 degrees + x
x = 180 degrees - 166 degrees
x = 14 degrees
Therefore, the measure of the third angle of the triangle is 14 degrees.
Angles a and b are supplementary. determine the measure of angle a if the measure of angle b is 115.2°. 244.8° 64.8° 25.2° 11.5°
The measure of angle 'a' is 64.8°.
What is supplementary angles?
Two angles are considered to be supplementary if their sums total 180 degrees.
For instance, angle 130° and angle 50° are supplementary angles since the sum of these two angles is 180°.
The given angle is a = 115.2°.
We have to find the angle 'b' supplementary to the angle 115.2°.
Since, sum of supplementary angles is 180 degrees.
⇒ a + b = 180°
115.2 + b = 180°
Subtract 115.2° from both sides,
b = 180° = 115.2°
b = 64.8°
Hence, the measure of angle 'b' which is supplementary to angle 'a' is 64.8°.
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consider a function z(x, y) and its partial derivative (∂z/∂y)x. under what conditions is this partial derivative equal to the total derivative dz/dy?
When the (∂z/∂x) is 0, the partial derivative (∂z/∂y) will be equal to the total derivative dz/dy.
What is Total Derivative?
The overall change in the dependent variable as a result of changes in all the independent variables is known as the total derivative of a function of multiple variables.
Given that,
A function z(x, y)and its partial derivative (∂z/∂y) is x.
We know that,
total derivative (dz) = (∂z/∂x) dx + (∂z/∂y) dy
here, (∂z/∂y) = x
So, The dz will be equal to (∂z/∂y) dy only if (∂z/∂x) dx = 0.
hence, (∂z/∂x) should be 0.
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PLEASE HELP GIVE BRAINLIEST
Answer:
top
Step-by-step explanation:
In the bottom, y=5x for all of the columns. In the top, y=2x for all except third column, so it is not proportional.
Factor 24cd − 36c2d.
A: 12c2d(2 − 6)
B: 12cd(2 − 36c2d)
C: 6cd(4 − 36c2d)
D: 4cd(6 − 9c)
Answer:
D
Step-by-step explanation:
24cd-36c²d = (4×6)c×d-(4×9)c×c×d
Then we take the common numbers and variables
4cd(6-9c) and to check our answer we can distribute 4cd to get:
4cd×6-(4cd×9c)
24cd-36c²d
Use point-slope form to write the equation of a line that passes through the point
(-12, 15) with slope - 1.
Answer:
y=-1x+3
Step-by-step explanation:
Find the equation of a line given the slope m = -1 and the point P = (-12 , 15)
Now, the y-intercept is b=y1−m⋅x1
b = 15 - (-1) ⋅ (-12) = 3
Finally, the equation of the line can be written in the form y=mx+b.
y = -1x + 3
Slope-intercept form is:
y = -1x + 3
Point-slope form is:
y - (15) = -1 ⋅ ( x - (-12))
If you want to check if right then:
Input the point given it should give you the y output if the equation of the line is correct.
-1x-(12)=12 and then add 3 and you get 15. It is therefore correct (-12,15).
I hope this helps!^^
the second angle of a triangle is 28 more than the first angle. the third angle is two times the first. find the three angles.
A new Community Wellness Complex is being built in Del Rio. The perimeter of the rectangular playing field is 414 yards. The length of the field is 9 yards less than triple the width What are the dimensions of the playing field?
Answer:
Length=153 yards
Width=54 yards
Hope this helps! :)
Step-by-step explanation: (153*=306, 54*2=108, 306+108=414)
P=2l+2w
P=414
L=3w-9
W=w
414=2(3w-9)+2w
414=6w-18+2w
414=8w-18
+18 +18
432=8w
/8
54=w
L=3(54)-9
L=162-9
L=153
what is a line that is perpendicular to the line y=1/2x-6 and passes through the point (-1 5)
Answer:
y=1/2x+5.5
Step-by-step explanation:
how would you explain the difference between qualitative and quantitative data sources? how would you explain the difference between qualitative and quantitative data sources?
The main difference between qualitative and quantitative data sources is qualitative is the categorial type and quantitative is a type of numerical.
What are the sources of data in mathematics?
In statistics, there are two sources of data. Census data and officially conducted surveys are examples of data that is gathered for some official purposes and are referred to as statistical sources. Non-statistical sources refer to the data that are collected for other administrative purposes or for the private sector.
These are the differences between qualitative vs. quantitative data:
Quantitative data is numbers-based, countable, or measurable. Qualitative data is interpretation-based, descriptive, and related to language.
Quantitative data tells us how many, how much, or how often in calculations.
Qualitative data can help us to understand why, how, or what happened behind certain behaviors.
Quantitative data is fixed and universal. Qualitative data is subjective and unique.
Quantitative research methods are measuring and counting. Qualitative research methods are interviewing and observing.
Quantitative data is analyzed using statistical analysis. Qualitative data is analyzed by grouping the data into categories and themes.
Hence, the main difference between qualitative and quantitative data sources is qualitative is the categorial type and quantitative is a type of numerical.
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a sample of 1200 computer chips revealed that 37% of the chips do not fail in the first 1000 hours of their use. the company's promotional literature claimed that more than 34% do not fail in the first 1000 hours of their use. is there sufficient evidence at the 0.05 level to support the company's claim? state the null and alternative hypotheses for the above scenario.
As per the question the required hypothesis are
Null Hypothesis, H0: p=0.72
Alternate Hypothesis, H1 : p ≠ 0.72
The null hypothesis reflects that there will be no observed effect in our experiment. In a mathematical formulation of the null hypothesis, there will typically be an equal sign. This hypothesis is denoted by H0.
The null and alternative are always claims about the population. That’s because the goal of hypothesis testing is to make inferences about a population based on a sample.
Often, we infer whether there’s an effect in the population by looking at differences between groups or relationships between variables in the sample. It’s critical for your research to write strong hypotheses.
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At a local print shop, 18 copies can be made for $6. At this rate, how how many copies could be made for $28?.
By using unitary method, it can be calculated that
For $28, 84 copies can be sold
What is unitary method?
Unitary method is the process in which the value of single unit can be calculated from the value of multiple unit and the value of multiple unit can be calculated from the value of single unit. Sometimes Value of single unit can be less than the value of multiple unit. For example - The relation between the cost of a commodity and the quantity of the commodity
Sometimes Value of single unit can be more than the value of multiple unit. For example - The relation between the number of men and the number of days taken by those men to do a certain job.
Here, unitary method is used
For $6, 18 copies can be sold
For $1, [tex]\frac{18}{6}[/tex] copies can be sold
For $1, 3 copies can be sold
For $28, 3 [tex]\times[/tex] 28 copies can be sold
For $28, 84 copies can be sold
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Find the roots of the equation
Answer: There are not any roots for that equation.
Tanya has read 3/4 of a book, which is 36 pages. How many pages are in the entire book?
Answer:
There are 48 pages in the whole book.
Step-by-step explanation:
We know that 36 is 3/4 of the book. To find the total number of pages, we have to divide 36 by 3. We know that is 12. Then, we have to multiply 12 by 4 to get the answer, 48.
a medicine to remove the redness in eyes were tested in a group of 100 students. the results now may be biased because the variable location is an example of lurking variable
Variable location is an example of a lurking variable in a study of medicine to remove the redness in eyes when tested in a group of 100 students. The statement is true.
Hidden variable is a variable that has a connection (e.g., may be correlated) with the answer and the explanatory variable but is neither the explanatory variable nor the response variable. Although it is not taken into account in the study, it might affect how the variables are related.
A hiding variable may misidentify a significant correlation between variables or may conceal the real correlation. A research scientist might, for instance, look at how nutrition and exercise affect someone's blood pressure. Smoking status and stress levels are additional factors that also influence blood pressure.
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Jacob knows that 120 means “1 divided by 20.” He uses this to find the decimal equivalent for 120. Enter a digit into each box to complete his work.
The value of the decimal equivalent for 120 will be;
⇒ 0.05
What is Decimal number?
A decimal number is a number that consists of a whole and a fractional part.
Given that;
Jacob knows that 120 means “1 divided by 20.”
Now,
Since, Jacob knows that 120 means “1 divided by 20.”
Hence, The value of 120 by using this will be;
⇒ 1/20 = 0.05
Thus, The value of the decimal equivalent for 120 will be;
⇒ 0.05
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Find the domain of the equation.
ln[tex]\frac{x^3+5x^2+3x-9}{x^2-x-2}[/tex]
The domain of the rational function [tex]\frac{x^3 + 5x^2 + 3x - 9}{x^2 -x - 2}[/tex] is:
D: {x ∈ R| x ≠ -1, 2}
How to find the domain?The domain will be the set of all real numbers, minus these ones that make the denominator equal to zero.
The denominator will be zero when:
x² - x - 2 =0
Using the quadratic formula we will get:
[tex]x = \frac{1 \pm \sqrt{(-1)^2 - 4*1*-2} }{2*1} \\\\x = \frac{1 \pm 3}{2}[/tex]
The two solutions are:
x = (1 + 3)/2 = 2
x = (1 - 3)/2 = -1
If the numerator is not zero on these values, then we need to remove them from the domain.
When x = 2 the numerator is:
2³ + 5*2² + 3*2 - 9 = 25
When x = -1
(-1)³ + 5*(-1)² + 3*-1 - 9 = -8
Neither of these is zero, so we need to remove x = -1 and x = 2 from the domain, then the domain is:
D: {x ∈ R| x ≠ -1, 2}
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one and one eights divided by one half
Answer: 9/4
Step-by-step explanation:
1 1/8 divided by 1/2 can be rewrite as
=9/8 divided 1/2
=9/8 timed 2/1
=18/8
= 9/4
If you can please give me a Brainliest, I only need 3 more to become an Ace, thank you!
Practice #3
Tell whether each table represents a function.
a. The table represents a function.
b. The domain is given as follows: {1, 2, .., 12 AM, 1, 2, ... , 12 PM).
c. The range is given as follows: {1, 2, 3, ..., 24}.
Is this a function? What are the domain and the range?To obtain whether a relation represents a function, we need to observe if each input is mapped to only one output.
This table gives the conversion of hours in the AM-PM format to hours in the military format. Each hour in the AM-PM format has only one equivalent hour in the military format, that is, each input is mapped to a single output, hence the table in fact represents a function.
The domain of a function is the set that contains all the input values of the function, hence for this problem the domain is the set of hours in the AM-PM format.
The range of a function is the set that contains all the output values of the function, hence for this problem the range is the set of hours in the military format.
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write a equivalent expression ( x + 3) +4y
The expression equivalent to the given expression will be x+y+3(1+y).
What is an expression?It is defined as the combination of constants and variables with mathematical operators.
It is given that the expression is,( x + 3) +4y
We have to write the equivalent expression for the given expression,
Expressions that function identically despite having different appearances are called equivalent expressions. If two algebraic expressions are equivalent, then they both have the same result when the same value of the variable is entered.
=( x + 3) +4y
=x+3+4y
=x+3+y+3y
=x+y+3+3y
=x+y+3(1+y)
Thus, the expression equivalent to the given expression will be x+y+3(1+y).
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henry scored 85, 76, 84, and 69 on four exams. what must he make on the fifth exam to have an average of 80?
Henry must have to score 86 marks in the fifth exam to make an average of 80 marks.
What is the average?
This is the arithmetic mean and is calculated by adding a group of numbers and then dividing by the count of those numbers. For example, the average of 2, 3, 3, 5, 7, and 10 is 30 divided by 6, which is 5.
Henry scored 85, 76, 84, and 69, and let's suppose he scored 'x' marks in the fifth exam.
Average = sum of all marks/total number of exams
80 =(85 + 76 + 84 + 69 + x)/5
80 = 314 + x/5
80 * 5 = 314 + x
400 = 314 + x
x = 400 - 314
x = 86
Hence, Henry must have to score 86 marks in the fifth exam to make an average of 80 marks.
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You roll two dice, one red and one green. Losing combinations are doubles (both dice showing the same number) and outcomes in which the green die shows an odd number and the red die shows an even number. The other combinations are winning ones. E is the event that you roll a winning combination.
The probability of rolling a winning combination will be 7/12 as the winning combination is 21 and Total combination will be 36.
What is probability?The probability is computed by dividing the total number of possible outcomes by the number of possible ways the event might occur. Probability and odds are two distinct ideas. Odds are calculated by dividing the likelihood of an event by the likelihood that it won't. By dividing the number of positive outcomes by the entire number of potential outcomes, probability—the likelihood that an event will occur—is determined. The most basic illustration is a coin toss. There are only two outcomes when you flip a coin: either it comes up heads or tails.
Here,
If the first die is red and the second one is green, then the sample space S is the following:
S=
(1,1), (1,2), (1,3), (1,4), (1,5), (1,6), (2, 1), (2,2), (2,3), (2,4), (2,5), (2,6), (3, 1), (3,2), (3,3), (3,4), (3,5), (3,6), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6), (5, 1), (5,2), (5,3), (5,4), (5,5), (5,6), (6, 1), (6, 2), (6,3), (6,4), (6,5), (6,6)
Hence n(S)=36.
Let's list the losing combinations:
E={(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (2, 1),
(2, 3), (2, 5), (4, 1), (4, 3), (4, 5), (6, 1), (6, 3), (6,5)}
n(E)=15
There are 36 total possiblities.
Out of which, winning probability is 21.
=21/36
=7/12
Given that the winning combination is 21 and the total combination is 36, the chance of rolling a winning combination is 7/12.
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A random number generator is used to create a list of 150 single-digit numbers. of those 150 numbers, 72 are odd and 78 are even. the number 9 was generated 15 times to the nearest whole percent, what is the experimental probability of an odd number other than 9 being generated? o 38% 0 48% o 52% o 79% 20°f sunny 'o
The experimental probability of an odd number other than 9 being generated is 38%.
Explain the term experimental probability?A probability that has been established by a series of tests is called an experimental probability. To ascertain their possibility, a random experiment is initiated and iterated over a number of times; each iteration is referred to as a trial. The goal of the experiment is to predict the likelihood that an event will occur or not.For the stated question-
150 numbers altogether.Odd numbers in total: 72There are 15 nines.Other odd numbers outside nine are as follows: 72 - 15 = 57
Probability = (number of odd numbers except nine)]/(total number)
Probability = 57/150
Probability = 0.38.
Thus, the experimental probability of an odd number other than 9 being generated is 38%.
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What is the value of 13(a • b + a2) + 4 if a = 5 and b = −3?
308
134
−74
−126
The value of the expression, 13(a • b + a²) + 4, when a = 5 and b = -3 is: B. 134.
How to Find the Value of an Expression?To find the value of an expression, we have to plug in the respective values for each of the variables given in the expression, then simplify.
Given the expression, 13(a • b + a²) + 4, where:
a = 5
b = -3
To find the value, substitute a = 5 and b = -3 into the expression:
13(5 • -3 + 5²) + 4
13(-15 + 25) + 4
13(10) + 4
= 130 + 4
= 134
The value is: B. 134.
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What is 8640 minutes, in days? (remember, there are 60 minutes in an hour and 24 hours in a day. ).
As there are 60 minutes in an hour and 24 hours in a day, there are 6 days as well as 144 days in 8640 minutes.
What is division?A number is split in division, which is a straightforward procedure. The simplest way to conceptualize it is as a set of things being distributed among a set of individuals, as in the example given above. In mathematics, division is the process of dividing a number into equal parts and calculating the maximum number of equal parts that may be formed. For instance, dividing 15 by 3 results in the division of 15 into 3 groups of 5 each.
Here,
There are 60 minutes in an hour,
=8640/60
=144 hours
There are 24 hours in a day,
=144/24
= 6 days
There is 6 days as well as 144 days in 8640 minutes as there are 60 minutes in an hour and 24 hours in a day.
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a national business magazine reports that the mean age of retirement for women executives is 63.2. a women’s rights organization believes that this value does not accurately depict the current trend in retirement. to test this, the group polled a simple random sample of 78 recently retired women executives and found that they had a mean age of retirement of 64.2. assuming the population standard deviation is 4.4 years, is there sufficient evidence to support the organization’s belief at the 0.02 level of significance?
The calculated value |Z| = |-2.00722 | = 2.00722 > 2.054 at 0.02 level of significance. So their claim is wrong.
Given that the mean age of retirement for women, executives is 63.2
Given that the size of the sample 'n' = 78
Given that the mean of sample x⁻ = 64.2
Given that the standard deviation 'σ' = 4.4 years
Null hypothesis: H₀: μ ≠ 63.2
Alternative Hypothesis: H₁: μ = 63.2
Test statistic
Z = -2.00722
|Z| = 2.00722 > 2.054 at 0.02 level of significance
The calculated value |Z| = 2.00722 > 2.054 at 0.02 level of significance
Therefore, we reject the hypothesis.
Statistics is the study of research and surveys on numerical data in mathematics. In order to conduct surveys, the hypothesis must be established. There are typically two different kinds of hypotheses. A null hypothesis is one that holds true, whereas an alternate hypothesis is another.
The null hypothesis is a broad assertion or default stance that there is zero happening or nothing happening in probability and statistics. For instance, there is no association between two measured events or a connection between groups.
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water is leaking out of an inverted conical tank at a rate of 8 , 900 8,900 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. the tank has height 11 11 meters and the diameter at the top is 5.5 5.5 meters. if the water level is rising at a rate of 24 24 centimeters per minute when the height of the water is 3 3 meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute.
the rate at which water is being pumped into the tank in cubic centimeters per minute. is 1508527.582 cm³/min
The net rate of flow dV/dt = flow rate in - flow rate out
Let flow rate in = k. Since flow rate out = 8900 cm³/min,
dV/dt = k - 8900
Now, the volume of a cone V = πr²h/3 where r = radius of cone and h = height of cone
dV/dt = d(πr²h/3)/dt = (πr²dh/dt)/3 + 2πrhdr/dt (since dr/dt is not given we assume it is zero)
So, dV/dt = (πr²dh/dt)/3
Let h = height of tank = 11 m, r = radius of tank = diameter/2 = 3/2 = 1.5 m, h' = height when water level is rising at a rate of 21 cm/min = 3.5 m and r' = radius when water level is rising at a rate of 21 cm/min
Now, by similar triangles, h/r = h'/r'
r' = h'r/h = 3.5 m × 1.5 m/12 m = 5.25 m²/12 m = 2.625 m = 262.5 cm
Since the rate at which the water level is rising is dh/dt = 21 cm/min, and the radius at that point is r' = 262.5 cm.
The net rate of increase of water is dV/dt = (πr'²dh/dt)/3
dV/dt = (π(262.5 cm)² × 21 cm/min)/3
dV/dt = (π(68906.25 cm²) × 21 cm/min)/3
dV/dt = 1447031.25π/3 cm³
dV/dt = 4545982.745/3 cm³
dV/dt = 1515327.582 cm³/min
Since dV/dt = k - 6800 cm³/min
k = dV/dt - 6800 cm³/min
k = 1515327.582 cm³/min - 6800 cm³/min
k = 1508527.582 cm³/min
So, the rate at which water is pumped in is 1508527.582 cm³/min
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a manufacturer must test that his bolts are 1.00cm long when they come off the assembly line. he must recalibrate his machines if the bolts are too long or too short. after sampling 121 randomly selected bolts off the assembly line, he calculates the sample mean to be 0.94cm. he knows that the population standard deviation is 0.31cm. assuming a level of significance of 0.05, is there sufficient evidence to show that the manufacturer needs to recalibrate the machines?
There is insufficient evidence to support that bolts are too long or too short.
What is Mean and Standard Deviation?
Mean: Dividing the sum of all values in a data set by the number of values.
Standard Deviation: The standard deviation is a measure that summarizes how far away from the mean each observation is.
Given:
mean: 0.94cm
standard deviation = 0.31cm
Alright, so a manufacturer must test that these bolts are long as they come off the manufacturing line and he must readjust the machines if they're too long or too short. Consequently, sample 121V and sample mean are 0.94 cm. So we want to test whether or not these are actually equal to two, so are no hypothesis is that the mean is too and our alternative hypothesis, because it says that we have to recalibrate if they're too short or too long, is that the mean is not too we could probably go with the left tail test here because the sample mean is under but we'll be safer with a two tail test um just because the standard deviation may sway things.
So what we want to do next is compute the test statistic and that's gonna be a Z score and that's just supplied by X bar minus population mean over standard deviation over squared event. And we're using Z here because we have a high sample size and since we know the population standard deviation.
Hence, There is insufficient evidence to support that bolts are too long or too short.
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To become a member of the liberty, there i a 40$ ignup fee and a 2$ monthly fee. Write a equation in lope intercept form that model thi ituation. How much will it cot for being a member for 18 month
18 months of All-Star Library membership cost $76 in total.
Explain the term linear equation?A linear equation is just an algebraic equation of a form y=mx+b, where m is the slope when b is the y-intercept, and only a constant or a first (linear) term are included. The variables in the preceding equation are y and x, and it is occasionally referred to as a "linear equation of two variables."For the given equation.
The sign-up fee for the library-all-star-members club = $40.
Let 'x' be the total number of months.
Let 'y' be the total cost.
Monthly fee = $2.
Then, the linear equation models is-
y = 2x + 40
Given that a particular club member has been a part of it for 19 months, we replace x with the number 19 as follows:
y = 2x + 40
y = 2 * 18 + 40
y = = 36 + 40
y = 76.
Thus, 18 months of All-Star Library membership cost $76 in total.
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The complete question is-
3. In order to become a member of the library-all-star-members club, there is a $40 sign-up fee and a $2 monthly fee. Write an equation in slope-intercept form that models this situation. Use equation you wrote in problem 3 to find the total cost of being an all-star library member for 18 months.
select the curve generated by the parametric equations. indicate with an arrow the direction in which the curve is traced as t increases. x
As t increases the curve is changing according to the plot points given by the parametric equations.
Define parametric equations?
The coordinates of the points that make up a geometric object, such as a curve or surface, are frequently expressed using parametric equations; in this case, the equations are collectively referred to as a parametric representation or parameterization (alternatively spelled as parametrisation) of the object. It describes a collection of numbers that represent functions with one or more independent variables. The parameters used here are the independent variables. For the representation of the coordinates that make up geometric objects like curves and surfaces, parametric equations are used. Additionally, a curve that is not a function can be drawn using parametric equations.
The equations are
x=1-t²
y=2t-t²,-1≤t≤2
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A farm has 21 goats. All of the goats sleep in three separate rooms. One more goat sleeps in Room 2 than sleeps in Room 1 and one more goat sleeps in Room 3 than sleeps in Room 2 . How many goats sleep in each Room?
The number of goats sleep in Room 1 is 6, Room 2 is 7 and in Room 3 is 8.
What is a linear equation?A linear equation can also be generated by equating to zero a linear polynomial over some field and extracting the coefficients.
The values that, when substituted for the unknowns, make the equality true are the solutions to such an equation.
With two variables, each solution can be understood as the Cartesian coordinates of a Euclidean plane point. This is where the name "linear" comes from when describing these types of equations.
Given total goats=21
Let the goats in room 1 be x.
Then, in the second room be x+1
And in the third room be (x+1)+1
x+(x+1)+(x+2)=21
3x+3=21
3x=18
x=6
Therefore, room 1=6
Room 2=7
Room 3=8
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Answer: The number of goats sleeping in Room 1 is 6, Room 2 is 7 and Room 3 is 8.
What is a linear equation?
A linear equation can also be generated by equating to zero a linear polynomial over some field and extracting the coefficients.
When substituted for the unknowns, the values that make the equality true are the solutions to such an equation.
With two variables, each solution can be understood as the Cartesian coordinates of a Euclidean plane point. This is where the name "linear" comes from when describing these types of equations.
Given total goats=21
Let the goats in room 1 be x.
Then, in the second room be x+1
And in the third room be (x+1)+1
x+(x+1)+(x+2)=21
3x+3=21
3x=18
x=6
Therefore, room 1=6
Room 2=7
Room 3=8
To know more about linear equations, visit:
brainly.com/question/11897796
Step-by-step explanation: