Answer:
hi
Step-by-step explanation:
A 14-foot ladder is leaning against a building. The ladder makes a 50° angle with the ground as shown in the diagram.
14 ft,
50ft
Which expression can be used to find the height, h, in feet that the ladder reaches on the building?
The height that the ladder reaches on the building is 10.7 feet
What is an equation?An equation is an expression that uses mathematical operations to show the relationship between numbers and variables. Types of equations are linear, quadratic, cubic and so on.
Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.
A 14-foot ladder is leaning against a building. The ladder makes a 50° angle with the ground. Let h represent the height of the building. Using trigonometric ratio:
sin(50) = h/14
h = 14 * sin(50)
h = 10.7 feet
The height is 10.7 feet
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We know 15 x 3 = 45.
So, which of the following statements are also true?
Choose all answers that apply
D) 3 is a multiple of 45
C) 15 is a factor of 45
E) All of the Above
B) 45 is a multiple of 15
A) 45 is a factor of 15
Answer:
B, C
Step-by-step explanation:
A) No, factors of 15 = 1, 3, 5, 15... so 45 is not a factor of 15
B) yes, 45 is the third multiple of 15 ( 15×3=45)
C) yes, factor of 45 is the number that divides 45 without leaving any remainders (45÷15=3), therefore 15 is a factor of 45
D) No, multiples must be bigger in value than the actual number because( a multiple of 45) means, the number we get when we multiply 45 by an integer... Here we can't multiply an integer by 45 and get the answer 3
at a point feet from the base of a church, the angles of elevation to the bottom of the steeple and the top of the steeple are and , respectively. find the height of the steeple.
the height from B to c is 54.95 feet and B to D is 35.01 feet and the height of the steeple is 19.94 feet.
at a point 50 feet from the base of a church, the angle of elevation to the bottom of the steeple and top of steeple are 35 and 47 40' respectively.
We need to find out the height of steeple.
observe the right-angle triangle corresponding to the given problem,
let find the height from the point B to the point D.
the angle of elevation =35
we know about the trigonometric representation of the function tan is.
[tex]tan\theta=\frac{opposite}{adjacent}[/tex]
observing the right-angle triangle ABD as we know
angle =35, adjacent =50 and the opposite leg is x,
[tex]tan35=\frac{35}{50} \\\\x=50tan35\\\\x=35.01 feet[/tex]
now let's find the height from B to C.
angle 2=47°40'
[tex]\theta2=47+\frac{40}{60} \\\\\theta=47.7\\\\now, tan47.7=\frac{y}{50} \\\\y=54.95 feet\\[/tex]
therefore the height of steeple is 54.95-35.01=19.94 feet.
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Alec buys a refrigerator priced at $820.33 . If the sales taxi s 10%,how much tax will Alec pay?
Answer:
$902.36
Step-by-step explanation:
820.33 times 10% = 82.033
add 82.033 to 820.33
820.33 + 82.033 = 902.363
Help with this equation
The measure of ∠ADB is equivalent to 90°.
What is geometry?Geometry is a branch of mathematics that deals with shapes, sizes, angles, and dimensions of objects.
Given is a geometrical image as shown.
We can write -
∠ADC = ∠ADB + ∠BDC
(- 3c + 120°) + (- 10 c + 145°) = 135°
- 3c + 120° - 10c + 145° = 135°
- 13c + 265° = 135°
265° - 135° = 13c
13c = 130
c = 10
Now -
∠ADB = (- 3c + 120) = 90°
∠ADB = 90°
Therefore, the measure of ∠ADB is equivalent to 90°.
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Find the least common denominator of 1/2x-6 and 2x/7x-21.
The least common denominator or LCD of the given fractions 1/2x-6 and 2x/7x-21 is (2x-6)(7x-21)
What is a fraction?A fraction can simply be defined in mathematics as the part of a whole variable or number.
Some types of fractions in mathematics are;
Proper fractionsImproper fractionsMixed fractionsComplex fractionsSimple fractionsWhat is the least common denominator?The least common denominator of a fraction is seen as the lowest or smallest number in all the common multiples of the denominator given.
Given the information, the fractions are;
1/2x-6 and 2x/7x-21
It is crucial to identify that the denominator of the two fractions are;
(2x-6)(7x-21)
They are in form of algebraic expressions, thus, the least common denominator is the product of the expression.
Hence, the lowest common denominator is (2x-6)(7x-21)
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The police department in your city was asked by the mayor’s office to estimate the cost of crime. The police began their study with burglary records, taking a random sample of 500 files. If the average dollar loss in a burglary, for this sample size 500 is $678, with a standard deviation of $560, construct the 95% confidence interval for the true average dollar loss in burglaries rounded to the nearest dollar amount.
The 95% confidence interval for the true average dollar loss in burglaries rounded to the nearest dollar amount is 629 to 727
What are variance and standard deviation?
The variance of a variate X is the arithmetic mean of the squares of all the deviations of X from the arithmetic mean of the observations and it is denoted by Var(X) or σ². The spread of statistical data is measured by the standard deviation. Distribution measures the deviation of data from its mean or average position. The positive square root of the variance of a variate X is known as the standard deviation.
Given here: Sample mean x=678, Sample size n=500, Standard deviation σ=560
Standard error=σ.x=σ/√n
=560/√500
=25.044
Now for a 95% Class interval the value of z=1.960
The margin of error, E=Z×standard error
=49.08624
Lower bound=628.9147
upper bound=728.0854
∴ The 95% interval for population mean = 629 to 727
Hence, The 95% confidence interval for the true average dollar loss in burglaries rounded to the nearest dollar amount is 629 to 727
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59+1/6r when r= -1/2
The value of the expression 59 + (1/6)r at r = - 1/2 will be 707/12.
What is the value of the expression?When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.
The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.
The expression is given below.
⇒ 59 + (1/6)r
The value of the expression at r = - 1/2 will be given as,
⇒ 59 + (1/6)(-1/2)
⇒ 59 - 1 / 12
⇒ (708 - 1) / 12
⇒ 707 / 12
The value of the expression 59 + (1/6)r at r = - 1/2 will be 707/12.
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Is 8.608 a rational number
Answer: Yes
Step-by-step explanation:
Answer:
[tex] \sf \textbf{8.608} \: is \: a \: rational \: number[/tex]
Step-by-step explanation:
Rational Numbers: Any number that can be written as a ratio (or fraction) of two integers is a rational number.
If 12 workers clean up a certain stretch of the Jukskei river in 4 days, how long would it have taken to clean up this stretch if only 8 workers had been available?
Answer:
6 days
Step-by-step explanation:
12 workers will clean up in 4 days
how many days would it take 8 workers?
let the number of days be x
x=(12×4)/8
x= 6 days
Obtain an estimate for the computation shown below by rounding the numbers so that the resulting arithmetic can easily be performed by hand or in your head.
0.87 x 310
The estimation of the numbers given as 0.87 × 310 will give 270.
Howw to calculate the estimation?You must approximate (eliminate or round off) the decimals to obtain whole numbers before you can use the whole numbers to find the product of two decimals using estimation.
A figure is discovered through estimation.
A value, amount, or size that rounds off to the nearest whole number is said to be approximating.
The estimation of the numbers given as 0.87 × 310 will give:
= 0.9 × 300
= 270.
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Among recent graduates of mathematics departments, half intend to teach high school. A random sample of size 2 is to be selected from the population of recent graduates. a. If mathematics departments had only four recent graduates total, what is the chance that the sample will consist of two graduates who intend to teach high school? b. If mathematics departments had 10 million recent graduates, what is the chance that the sample will consist of two graduates who intend to teach high school? c. Are the selections technically independent in part a? Are they technically independent in part b? In which part can you assume independence anyway? Why?
In part a, since the population mean is small, selections are independent and can be assumed to be so. In part b, the population size is too large for selections to be independent, so independence can not be assumed.
a. If mathematics departments had only four recent graduates total, the chance that the sample will consist of two graduates who intend to teach high school is
0.5 * 0.5
= 0.25.
b. If mathematics departments had 10 million recent graduates, the chance that the sample will consist of two graduates who intend to teach high school is
0.5 * 0.5
= 0.25.
c. The selections are technically independent in part a, since the population size is small enough that the selection of one person will not affect the probability of selecting the other person. The selections are not technically independent in part b, since the population size is so large that selecting one person affects the probability of selecting the other person. In part a, you can assume independence since the population size is small enough that it is reasonable to assume that the selections are independent. In part b, you cannot assume independence since the population size is too large to make this assumption.
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I need help with math
The measure of r is 24°
Vertically Opposite Angles:The opposing angles created by the junction of two lines are known as vertically opposite angles or vertical angles. A pair of angles that are vertically opposed to one another is always equal.
Additionally, the vertical angle and its adjacent angle add up to 180° which is said to be a supplementary angle.
Here we have
3 straight lines are met at a point
Let's name each name as l, m, and n as the given figure
From the line l
=> ∠LOM + ∠MON + 122° = 180° [ Pairs of Linear angles ]
=> 34° + ∠MON + 122° = 180°
=> ∠MON = 180° - 122°- 34°
=> ∠MON = 24°
Here
∠MON and r are two vertically opposite angles
As we know vertically opposite angles are equal
=> r = 24°
Therefore,
The measure of r is 24°
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the annual expenditure of the us federal government is approximately 444 trillion dollars. if a one dollar bill is 0.00010.00010, point, 0001 meters thick, how many meters tall would a stack of 444 trillion one dollar bills be? write your answer in scientific notation. for reference: 111 trillion
the annual expenditure of the US federal government is 4 trillion dollars and dollar bill is 0.001m then, the length of four trillion dollars would be 4×[tex]10^{9}[/tex] m
Government spending or expenditure includes all government
consumption, investment, and transfer payments. In national income accounting, the acquisition by governments of goods and services for current use, to directly satisfy the individual or collective needs of the community, is classed as government final consumption expenditure.
Since we have given that annual expenditure = 4 trillion dollars,
1 dollar bill = 0.0001m
so, the thickness would be.
[tex]4*10^{12} *0.001\\\\=4*10^{12}*10^{-3}\\\\=4*10^{9}[/tex]
the length of 4 trillion dollars would be. 4×[tex]10^{9}[/tex]
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Listed below are the systolic blood pressures for a sample of six men aged 20-29 and for a sample of six men aged 60-69 Men aged 20-29: 117 122 129 118 131 123
Men aged 60-69: 130 153 141 125 164 139
Find the variance for each of the two sets of data then compare the variance. Round results to one decimal place.
A) Men aged 20-29: 4.8% Men aged 60-69: 10.6%
There is substantially more variation in blood pressures of the men aged 60-69.
B) Men aged 20-29: 4.6% Men aged 60-69: 10.2 %
There is substantially more variation in blood pressures of the men aged 60-69.
C) Men aged 20-29: 7.6% Men aged 60-69: 4.7%
There is more variation in blood pressures of the men aged 20 -29.
D) Men aged 20-29: 4.4% Men aged 60-69: 8.3%
There is substantially more variation in blood pressures of the men aged 60-69.
The obtained Z score for the following blood pressures =-2
Enter data in Excel work sheet and use the formulae
=VAR(A1:A6) and =VAR(B1:B6) to get the variance
Variance for
Men aged 20-29=42.97
Men aged 60-69=211.77
The variance is substantiaaly larger for the set of blood pressures of men aged 60-69
Enter the data in Excel worksheet and use =AVERAGE(A1:A15) to find mean and calculate is the mean
Mean=15833.33 and is to calculated for finding relative position
Z=38-(27*10)=-232Z=262.7-(200*57)=-11,137.3
Hence 262.7 has higher relative position
=[48-70]/11=-2
Z score=-2
The calculated Z score for the subsequent blood pressures is therefore = -2.
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4x5x8+1x58-3+41-27x4?
Answer:37,396
Step-by-step explanation:
A car travels 19 mph slower in a bad rain storm than in sunny weather. The car travels the same distance in 2 hr in sunny weather as it does in 3 hr in rainy weather.
Find the speed of the car in sunny weather.
It is in good conditions, the automobile travels at 57 mph.
Explain about the distance?Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.
A scalar quantity known as distance measures "how much ground an object has traversed" while moving. The term "how far out of place an object is" is referred to by the vector quantity displacement, which is the object's overall change in position.
Simply draw a vector from your initial position to your destination and solve for the length of this line to determine displacement. In the case of a circular 5K path, where your beginning and ending positions are identical, your displacement is 0. Displacement in physics is denoted by s.
"A automobile moves 20 mph more slowly in heavy rain than in bright sunshine."
x - 19 = y
where "x" stands for speed in good weather and "y" stands for speed in bad weather.
"The same distance is covered by the car in two hours in the sun as it is in three hours in the rain."
2x = 3y
where "x" stands for speed in good weather and "y" stands for speed in bad weather.
The speed of the car in good weather, or "x," is what we are looking for. In the second equation, substitute the first equation's value for the variable "y."
x - 19 = y
2x = 3y
2x = 3 (x - 19)
Distribute:
2x = 3x - 57
3x off on both sides equals:
-x = -57
Give both sides a -1:
x = 57
It is in good conditions, the automobile travels at 57 mph.
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Cameron determined that an ordered pair made a true statement when substituted into one of the equations but not in the other equation. Is her ordered pair a solution to the system of equations? If not, explain.
The ordered pair is not solution to the system of equations.
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
Cameron determined that an ordered pair made a true statement when substituted into one of the equations but not in the other equation.
As, we know we enter the values of the variables into each equation to see if an ordered pair is a solution to the system of two equation. The system has a solution if the ordered pair proves both of the equations.
So, the ordered pair is not solution..
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in 1973, braley and nelson studied the effect of price increases on school lunch participation in the city of pittsburgh. the revenue function for the program was given by: r ( q )
The new revenue can be calculated as R = q*p = 2,000*4 = $8,000.
R(q) is the revenue function for the school lunch program, which is given by the equation q*p, where q is the quantity and p is the price. According to Braley and Nelson's study, the city of Pittsburgh had an increase in price of school lunches. The revenue can be calculated by multiplying the quantity (q) of school lunches with the new price (p) after the increase. Therefore, the new revenue (R) can be calculated by R = q*p. As an example, if the quantity of school lunches is 2,000 and the price is increased to $4, then the new revenue can be calculated as R = q*p = 2,000*4 = $8,000.
R(q) is the revenue function for the school lunch program, which is given by the equation q*p, where q is the quantity and p is the price. According to Braley and Nelson's study, the city of Pittsburgh had an increase in price of school lunches. The revenue can be calculated by multiplying the quantity (q) of school lunches with the new price (p) after the increase. Therefore, the new revenue (R) can be calculated by R = q*p. As an example, if the quantity of school lunches is 2,000 and the price is increased to $4, then the new revenue can be calculated as R = q*p = 2,000*4 = $8,000.
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a = bh; h
solve
pls show work
The solution for h according to the given equation a = bh as required is; h = a / b.
What is the solution for the equation for variable, h?It follows from the task content that the solution for the given equation for variable, h be determined.
On this note, since the given equation is;
a = bh
To solve for variable, h; divide both sides of the equation by b so that we have;
h = a / b.
Ultimately, the required solution for variable, h is; h = a / b.
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Ishi bought a $6.95 canvas and 8 tubes of paint. She spent a total of $24.95 on the canvas and paints. Determine the cost of each tube of paint.
Answer:
1 tube of paint is $2.25.
Step-by-step explanation:
We can set this as an equation first. Since we know that the canvas is $6.95 and the total is $24.95, those are the values that we will work with to determine the tube price. We can set the tube price as 8x, x being the tube price, and 8 being the number of tubes Ishi plans to buy. Now, we can set an equation:
6.95 + 8x = 24.95
8x = 18
x = 18/8 (simplified is 9/4, or 2.25)
Answer:
$ 2.25
Step-by-step explanation:
A= $6.95
B= (Cost of each tube) x 8
C= $24.95
A+B = C
use the graphs to determine the intervals on which the functions are increasing, decreasing, or constant
For the first graph, the function is increasing when the graph is sloping upwards, which is the case between the points (-1,1) and (1,3). For the second graph, the function is increasing when the graph is sloping upwards, which is the case between the points (0,2) and (2,4).
For the first graph, the function is increasing from interval (-1,1) and decreasing from interval (1,3).
For the second graph, the function is increasing from interval (0,2) and decreasing from interval (2,4).
For the first graph, the function is increasing when the graph is sloping upwards, which is the case between the points (-1,1) and (1,3). This indicates that the function is increasing on the interval (-1,1). Similarly, the function is decreasing when the graph is sloping downwards, which is the case between the points (1,3) and (3,1). This indicates that the function is decreasing on the interval (1,3).
For the second graph, the function is increasing when the graph is sloping upwards, which is the case between the points (0,2) and (2,4). This indicates that the function is increasing on the interval (0,2). Similarly, the function is decreasing when the graph is sloping downwards, which is the case between the points (2,4) and (4,2). This indicates that the function is decreasing on the interval (2,4).
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Ten less than twice a number is equal to at least 52. What are all the possible values of the number? Write an inequality so that X term comes first.
The inequality equation which represents Ten less than twice a number is equal to at least 52 is 10 - 2x ≥ 52 and x ≤ -21
How to write and solve inequality?Let
The unknown number = x
Ten less than twice a number is equal to at least 52;
10 - 2x ≥ 52
Subtract 10 from both sides
- 2x ≥ 52 - 10
- 2x ≥ 42
divide both sides by - 2
x ≤ 42/-2
x ≤ -21
Hence, x ≤ -21 is the solution to the inequality 10 - 2x ≥ 52 if x comes first.
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Which of these do not include direction? Distance, Force, Acceleration or Velocity?
Scalar quantities of these do not include direction distance, Force, Acceleration, or Velocity.
scalar, a physical quantity whose sole description is its magnitude. Scalars include, but are not limited to, time, energy, mass, volume, density, and speed.
A scalar quantity is one that doesn't depend on movement in any direction. Vector quantities can have a magnitude and a direction. Scalar quantities have just a magnitude.
All of the option values are scalar, with the exception of impulse. A force can be an impulse. Similar to force, it has both magnitude and direction.
Additional examples of scalar quantities are mass, velocity, distance traveled, time passed, energy, density, volume, temperature, work, etc.
Since speed has a simple magnitude and no discernible direction, it is a scalar number.
A scalar quantity is something like distance. Any quantity that has both a direction and a magnitude is a vector.
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a company makes rugs. their smallest rug is a 2 ft-by-3 ft rectangle. their largest rug is a similar rectangle. if one side of their largest rug is 18 ft, what are the possible dimensions of their largest rug? there are two possible sets dimensions. list the two sets below. the smallest dimension is listed first.
Answer:
The company's largest rug dimensions are either 18 ft by 27 ft Or 12 ft by 18 ft.
Step-by-step explanation:
Given:
Dimension of the smaller rug are 2 ft by 3 ft.
Also One side of the largest rug is 18 ft.
We need to find the possible dimension of largest rug.
Also Given:
Both the smaller rug and larger rugs are similar.
Now By Similar rectangles property which states that;
"When 2 rectangles are similar then their lengths are in proportion."
In this case there are 2 possibilities.
either the largest rug's 18 ft side is similar to the 2 ft side or the 3 ft side
Now let us consider the other side be 'x'.
Now when he largest rug's 18 ft side is similar to the 2 ft side we get;
Now when he largest rug's 18 ft side is similar to the 3 ft side we get;
Hence the company's largest rug dimensions are either 18 ft by 27 ft OR 12 ft by 18 ft.
When you take samples from a population and compute a proportion from each one, you can consider the distribution of those proportions. This is called the sampling distribution for the population proportion.The Central Limit Theorem tells us that the sampling distribution for the population proportion is a) skewed left b) skewed right c) approximately normal d) uniform with the a) true population standard deviation b) true population proportion c) true population mean as its a)standard deviation b) mean c) proportion .
The sampling distribution is approximately normal.
What is the standard deviation?
Standard Deviation is calculated by first squaring the differences between the observations and the mean and then taking the square root of the sum of the squares of the differences divided by the number of observations - 1.
The Central Limit Theorem tells us that the sampling distribution for the population proportion is approximately normal.
The mean of the sampling distribution is equal to the true population proportion and the standard deviation of the sampling distribution is equal to the true population proportion times (1 - true population proportion) divided by the sample size.
So, the sampling distribution is approximately normal, with the true population proportion as its mean and the true population proportion times (1 - true population proportion) divided by the sample size as its standard deviation.
Hence, the sampling distribution is approximately normal.
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2 What is the derivative of the function f(x) = 3x² + 2√x - 4x at x=1?
Answer:
The derivative of the function f(x) = 3x² + 2√x - 4x at x=1 is
[tex]\boxed{f'(1) = 3}[/tex]
Step-by-step explanation:
We have f(x) = 3x² + 2√x - 4x
[tex]f'(x) = \dfrac{d}{dx}\left(3x^2+2\sqrt{x}-4x\right)\\\\=\dfrac{d}{dx}\left(3x^2\right)+\dfrac{d}{dx}\left(2\sqrt{x}\right)-\dfrac{d}{dx}\left(4x\right)\\\\[/tex]
[tex]\dfrac{d}{dx}\left(3x^2\right) = 6x\\\\[/tex]
[tex]\dfrac{d}{dx}\left(2\sqrt{x}\right) = 2\dfrac{d}{dx}\left(\sqrt{x}\right)\\\\=2\dfrac{d}{dx}\left(x^{\frac{1}{2}}\right)\\\\= =2\cdot \dfrac{1}{2}x^{\frac{1}{2}-1}\\\\\\=\dfrac{1}{\sqrt{x}}\\\\[/tex]
[tex]\dfrac{d}{dx}\left(4x\right)=4[/tex]
Therefore
[tex]f'(x) = 6x+\dfrac{1}{\sqrt{x}}-4\\\\f'(1) = 6(1) + \dfrac{1}{\sqrt{1}} - 4\\\\f'(x) = 6 + 1 - 4\\\\f'(x) = 3\\\\[/tex]
To solve the system of equations below, Zach isolated x2 in the first equation and then substituted it into the second equation. What was the resulting equation?
Since Zach isolated x^2 in the first equation and then substituted it into the second equation, the resulting equation is equal to: C. 25 - y^2/16 - y^2/9 = 1.
What is an equation?In Mathematics, an equation is sometimes referred to as an expression and it can be defined as a mathematical expression which shows that two (2) or more quantities are equal.
From the information provided above, we have the following system of equations;
x^2 + y^2 = 25 ....... equation 1.
x^2/16 - y^2/9 = 1 ....... equation 2.
By making x^2 the subject of formula in equation 1, we have the following:
x^2 = 25 - y^2 ....... equation 3.
By substituting equation 3 into equation 2, we have the following:
25 - y^2/16 - y^2/9 = 1
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Drag each item to the container that best describes it.
Answer:
Rate : 1 page for every 4 students.
Unit Rate: 500 pages per ream.40 pages for every blooket.15 pages for evry blooket
Neighter: 25 pages
Step-by-step explanation:
I hope this helps :)
The diffrence between unit rate and rate is the unit rate refers to those rates in which the numerator is 1. Rate would be like there is 1 person per car. Unit rate would mean There are 3 cars for each person.
one gallon of paint covers 400 squars feet. what is the least amount of paint needed to paint the walls of s room in the shape of a rectangular prism with a length of 20 feet, a width of 18 feet. and a height of 12 feet?
The minimum amount of paint needed to paint the walls of the room would be 2,2 gallon.
How to calculate the amount of paint we need?To calculate the amount of paint we need to paint the walls of the room we must calculate the area of each of the walls, in this case it would be 4 rectangles with the following dimensions:
(12ft x 18ft)*2(20ft x 12ft)*2According to the above, the area of the walls would be:
12*18=216cm²20*12=240cm²216cm² * 2 = 432cm² 240cm² * 2 = 880cm²880cm² + 432cm² = 1312cm²Based on the above, it can be inferred that 2.2 gallons of paint are needed to paint all the walls.
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