The statements are:
y=e" and y = ln x are inverses.
This is false. The inverse of y = e^x is y = ln x, and the inverse of y = ln x is y = e^x. So, the two functions y = e^x and y = ln x are inverses of each other, but y = e^x and y = e^ln x are not.
In een In(x) = log. (x)
This is false. The statement should be: e^ln(x) = x, which is true by the definition of logarithms.
ln e = 1
This is true. The natural logarithm of e is 1.
In (x) = log10 (x)
This is false. The statement should be: log10(x) = log(x) / log(10).
In e = 10
This is false. The natural logarithm of e is 1.
In(e) and en both equal x.
This is false. In(e) = 1, and e^n = x does not necessarily imply that In(e) = x.
Select the correct answer.
The sum of the digits of a three-digit number is 13. The tens digit, t, is 1 more than the hundreds digit, h. The units digit, u, is 3 more than the sum of the tens and hundreds digits. Which system of equations can be used to find each digit?
System of equations can be used to find each digit is option A.
Describe Equation?An equation is a mathematical statement that shows that two expressions are equal to each other. It consists of two sides, the left-hand side (LHS) and the right-hand side (RHS), separated by an equal sign (=). The LHS and RHS can contain numbers, variables, and mathematical operations such as addition, subtraction, multiplication, division, exponents, and roots.
Let's represent the hundreds, tens, and units digits as h, t, and u, respectively. Then we can use the given information to set up a system of equations:
A three-digit number has a digit sum of 13:
h + t + u = 13
One more than the hundreds digit (h) is the tens digit (t):
t = h + 1
The digit in the units, u, is 3 greater than the total of the digits in the tens and hundreds:
u = t + h + 3
Therefore, the correct system of equations is:
h + t + u = 13
t = h + 1
u = t + h + 3
Therefore, the answer is (A).
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Erin withdrew $29.85 from her bank account. She plans to spend
$2.90 per day on lunch. Approximately how many days will her money
last?
Answer:
$2.90---1 day
$29.85----x days
x=29.85×1/2.90
x=10.29 days
An elevator travels directly up 36 floors in 108 seconds. How many floors can this elevator travel directly up in 80 seconds?
The number of floors can this elevator travel directly up in 80 seconds is, 26 2/3 floors
What is the relation between time, distance & speed ?The distance covered by the object is equal to the product of the speed at which the object is moving and time taken for covering the distance.
Distance = Time × Speed
We are given that the elevator travels 36 floors in 108 seconds, so the rate can be calculated as follows:
rate = 36 floors / 108 seconds
= 1 floor / 3 seconds
To determine how many floors the elevator can travel in 80 seconds, we can use the rate and the formula: distance = rate x time:
distance = rate x time
distance = (1 floor / 3 seconds) x 80 seconds
distance = 80 / 3 floors
distance = 26 2/3 floors
So, the elevator can travel directly up 26 2/3 floors in 80 seconds.
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5 5/2+2 3/5 pls I rlly need it
Answer:
Step-by-step explanation:
To solve the expression "5 (5/2) + 2 (3/5)", we'll first simplify each term inside the parentheses, then add them up:
5 (5/2) = 5 * (5/2) = 5 * 2.5 = 12.5
2 (3/5) = 2 * (3/5) = 2 * 0.6 = 1.2
Now we can add the two terms:
12.5 + 1.2 = 13.7
So the expression "5 (5/2) + 2 (3/5) = 13.7".
Answer:
[tex]\frac{137}{10}[/tex] / 13[tex]\frac{7}{10}[/tex]
Step-by-step explanation:
5 [tex]\frac{5}{2}[/tex] +2 [tex]\frac{3}{5}[/tex]
= [tex]\frac{11}{2}[/tex] + [tex]\frac{13}{5}[/tex]
do cross multiplication
= [tex]\frac{137}{10}[/tex]
further simplify ⇒ mixed fraction= 13[tex]\frac{7}{10}[/tex]
Help please…………………………………..
Answer:
4/3
Step-by-step explanation:
This is the worse piecewise function I have ever seen in my life.
4/3. Just plug in an infinitely close number to -1 in a calculator and you get 1.3
Fill in the missing number to write an equivalent ratio. Show your work.
3/8 = blank/24
Answer:9
Step-by-step explanation:
3/8=x/24
3/8=x/3*8
[tex]\frac{3}{8} =\frac{\frac{x}{3} }{8}[/tex]
3=x/3
x=9
Answer:
First, we evaluate the amount that the portion has been multiplied by. We want to determine how many number 8's fit in to the number 24 because the bottom of the portion is 24.
The solution would be 3, because eight multiplied by 3 equals 24. Also because the bottom of the fraction has been multiplied by three, the top, known as the numerator, also needs to be multiplied by three. As a result, the top becomes 3 multiplied by 3, which equals 9. As a result, the portion is 9/24.
Step-by-step explanation:
3/8=?/24
3/8*3/3=9/24
9/24
____ =/8
3/3
In screen shot help me I hate it
The factorizations of the following are x²+3x-4 = (x+4)(x-1),x²-2x-3 = (x-3)(x+1) and x²+2x-8 = (x+4)(x-2).
How to find the factors of a quadratic expression?
If the given quadratic expression is of the form ax^2 + bx + c, then its factored form is obtained by two numbers alpha( α ) and beta( β) such that:
[tex]betab = \alpha + \beta \\ ac =\alpha \times \beta[/tex]
Then writing b in terms of alpha and beta would help us getting common factors out.
Sometimes, it is not possible to find factors easily, so using the quadratic equation formula can help out without any trial and error.
We are given that;
a) x²+3x-4
b) x²-2x-3
c) x²+2x-8
Now,
a) To factorise x²+3x-4, we need to find two numbers whose product is -4 and whose sum is 3. Those numbers are 4 and -1, so we can write:
x²+3x-4 = (x+4)(x-1)
b) To factorise x²-2x-3, we need to find two numbers whose product is -3 and whose sum is -2. Those numbers are -3 and 1, so we can write:
x²-2x-3 = (x-3)(x+1)
c) To factorise x²+2x-8, we need to find two numbers whose product is -8 and whose sum is 2. Those numbers are 4 and -2, so we can write:
x²+2x-8 = (x+4)(x-2)
Therefore, by factorization the answers will be x²+3x-4 = (x+4)(x-1),x²-2x-3 = (x-3)(x+1) and x²+2x-8 = (x+4)(x-2).
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Is the product of (x − 3)^2 a perfect square trinomial? Explain your reasoning...
The product of (x - 3)² is a perfect square trinomial.
What is a perfect square?
An algebraic expression that is created by squaring a binomial expression is known as a perfect square trinomial. It takes the shape of ax² + bx + c. Real numbers a, b, and c are present here, and a ≠ 0.
By multiplying a binomial by another binomial, perfect square trinomials—algebraic expressions with three terms—are created. A number can be multiplied by itself to produce a perfect square. Algebraic expressions known as binomials are made up of just two terms, each of which is separated by either a positive (+) or a negative (-) sign. Similar to polynomials, trinomials are three-term algebraic expressions. When a binomial made up of a constant and a variable is multiplied by itself, a perfect square trinomial with three terms is produced. A positive or a negative sign separates each term in a perfect square trinomial.
Given expression is
(x - 3)²
Apply the formula (a - b)² = a² - 2ab - b²:
= x² - 2×x×3 + 3²
= x² - 6x + 9
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cereal boxes fill 3/4 of each of 8 shelves at a grocery store. if the boxes are moved together, how many shelves will they fill?
The number of cereal boxes in total is 48.
What is the unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
Given that, cereal boxes fill 3/4 of each of 8 shelves at a grocery store.
Now, number of boxes in each shelve = 3/4 ×8
= 6
Thus, the number of boxes in 8 shelves
= 8×6
= 48
Therefore, the number of cereal boxes in total is 48.
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What is an outlier in statistics?
It is an observation that significantly differs from the other observations in a dataset is referred to as an outlier in statistics.
An observation that significantly differs from the other observations in a dataset is referred to as an outlier in statistics. A true abnormality in the data may be the cause of an outlier, but they can also happen by chance as a result of random variation in the data, or they might be a sign of a measurement or data entry error.By modifying the dataset's mean, variance, or correlation, outliers can alter the outcomes of statistical studies. In order to properly handle outliers, it is crucial to recognise them.
There are several techniques to identify outliers in a dataset, including graphical techniques like scatter plots or box plots, as well as numerical techniques like computing z-scores or utilising the interquartile range (IQR). Consider any observation more than once is a general rule of thumb.
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Question is in the picture.
Answer:
x = 3 ± 2[tex]\sqrt{6}[/tex]
Step-by-step explanation:
x² - 6x = 15
to complete the square on the left side
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 3)x + 9 = 15 + 9
(x - 3)² = 24 ( take square root of both sides )
x - 3 = ± [tex]\sqrt{24}[/tex] = ± [tex]\sqrt{4(6)}[/tex] = ± ([tex]\sqrt{4}[/tex] × [tex]\sqrt{6}[/tex] ) = ± 2[tex]\sqrt{6}[/tex]
add 3 to both sides
x = 3 ± 2[tex]\sqrt{6}[/tex]
then
x = 3 - 2[tex]\sqrt{6}[/tex] , x = 3 + 2[tex]\sqrt{6}[/tex]
how to multiply fractions with the same denominator
when multiplying fractions , multiply across the numerator and denominator
you dont need common denominators
example
[tex]\frac{1}{2}*\frac{4}{5}=\frac{1*4}{2*5}[/tex]
Hope this helps : -)
- Jeron
a man brought some glasses at 12 each and 5 broke so he sold remaining at 16 each and made profit of rupees 160.find number of glasses he bought
Answer:
number of glasses he bought = 60
Step-by-step explanation:
Let the variable x represent the number of glasses he bought
Total cost of x glasses at Rs. 12 each = 12x
5 glasses broke so remaining number of glasses = x- 5
He sold this quantity of glasses for Rs. 16 each
Total sale price of (x - 5) glasses = 16(x - 5)
Total profit = Total sales - Total cost = 160
=> 16(x - 5) - 12x = 16
Expand brackets for 16(x - 5): 16x - 16 x 5 = 16x - 80
Therefore we get
16x - 80- 12x = 160
4x - 80 = 160
Add 80 on both sides:
4x -80 + 80 = 160 + 80
4x = 240
x = 240/4 = 60
Given y = x/x-1 and x > 1, which of the following is a possible value of y?
Answer: E
Step-by-step explanation: This is from my mathematical knowledge however there is an asymptote at y=1. All values for y must be higher than one for it to be viable. So E is the only one that works.
If equation y = x/x-1 and x > 1, then 1.9 is the possible value of y.Option E is correct.
What is Inequality?a relationship between two expressions or values that are not equal to each other is called 'inequality.
The given equation is y=x/x-1
Where value of x should be greater than one.
x>1
We have to find the possible value of y from the given options.
We have to check the options by considering the value is greater than one or not.
-1.9 is less than one so it is not possible value of y.
-0.9 is less than one so it is not possible value of y.
0.0 is less than one so it is not possible value of y.
0.9 is less than one so it is not possible value of y.
1.9 is greater than one so it is possible value of y.
Hence, if equation y = x/x-1 and x > 1, then 1.9 is the possible value of y.
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Adrian has 75 baseball cards. He wants the same number of cards in each pile. How many cards can he have in each pile. List all possibilities.
If Adrian has 75 baseball cards. He wants the same number of cards in each pile. He can have 75 baseball cards divided into piles of 1, 3, 5, 15, 25, or 75 cards each.
What is the number of cards?Adrian wants to divide his 75 baseball cards into piles such that each pile has the same number of cards. This means the number of cards in each pile must be a factor of 75. To find all the possible numbers of cards in each pile, we can find all the factors of 75.
The factors of 75 are:
1, 3, 5, 15, 25, and 75.
So, Adrian can have the same number of cards in each pile as:
1, 3, 5, 15, 25, or 75.
Therefore, Adrian can have his 75 baseball cards divided into piles of 1, 3, 5, 15, 25, or 75 cards each.
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For the functions f and g given below, evaluate (gof)(-7).
f(x) = x² + 6
g(x)=√x-1
The value of (gof)(-7) is 3√6.
What is a function?A relation is a function if it has only One y-value for each x-value.
The given functions are f(x) = x² + 6 and g(x)=√x-1
We need to find the value of (gof)(-7).
Let (gof)=g(f(-7))
=g( (-7)² + 6)
=g( 49 + 6)
=g(55)
=√55-1=√54
=√9×6
=3√6
Hence, the value of (gof)(-7) is 3√6.
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write 72 as a fraction in simplest form and as a decinal
The simplest form of the fraction 7/2 is 7/2.
3.5 is the decimal number form of 7/2.
What is decimal?Decimals are numbers that have two components, a whole number component and a fractional component, which are separated by a decimal point.
Given:
A fraction number is 7/2.
And 2 and 7 are the prime numbers.
The factors of 7 are 7 and 1.
The factors of 2 are 2 and 1.
There is no other than 1 common factor between 7 and 2.
So, the simplest form of the fraction 7/2 is 7/2.
Now, fraction as a decimal,
= 7/2
= 3.5
Therefore, 3.5 is the required decimal number.
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The complete question;
Write 7/2 as a fraction in simplest form and as a decimal.
You want to deliver a package to Japan. The FedEx delivery service charges a $10 flat fee plus $2 per pound. You can also use the USPS Priority Mail service which charges a $2 flat fee plus $4 per pound.
Write an equation for the cost for USPS Priority Mail to send the package.
Use x as the number of pounds and use y as the total cost.
Answer:5kg
Step-by-step explanation:
Step 1.
Write in y=mx+c format
m= $/kg
c=flat fee
x=additional kilograms
FedEx:
y=2x+15
USPS:
y=5x
Step 2.
Keep Changing the x value (the no. of kilograms) in both equations until y is the same number
y=5×5
=25
y=2×5+15
=25
∴It would cost the same for both options at 5kg
A rhombus has sides of length 8 m. It’s shorter diagonal is 10 m long. Find the length of the longer diagonal
Answer:
Step-by-step explanation:
Here's how you can find the length of the longer diagonal of a rhombus with sides of length 8 m and a shorter diagonal of length 10 m:
Step 1: Draw a diagram of the rhombus with the shorter diagonal labeled as 10 m.
Step 2: Draw a perpendicular bisector from one corner of the rhombus to the opposite corner, dividing the rhombus into two congruent right triangles.
Step 3: Label the longer diagonal as "d".
Step 4: Since the two congruent right triangles have sides that are half the length of the sides of the rhombus, the hypotenuse of each triangle must have length 4 m.
Step 5: Using the Pythagorean theorem, we can find the length of the other side of each triangle:
a^2 + b^2 = c^2
4^2 + b^2 = 10^2
16 + b^2 = 100
b^2 = 84
b = √84 = 2√21
Step 6: Now that we know the length of one side of each triangle, we can use it to find the length of the longer diagonal:
d^2 = 4^2 + (2√21)^2
d^2 = 16 + 168
d^2 = 184
d = √184 = 2√23
So, the length of the longer diagonal of the rhombus is 2√23 m.
Which is bigger -7/8 or -5/8
Answer:
-5/8
Step-by-step explanation:
-7/8 = -0.875
-5/8 = -0.625
The closer the negative number is to 0, the bigger that number.
-0.625 is closer to 0 than -0.875
So, -5/8 is bigger.
4x^2-80=0
Please help me understand?
Answer:
x = ± √20
or if you want an approximate solution correct to the nearest hundredth:
x = -4.47, 4.47.
Step-by-step explanation:
4x^2-80=0
This a quadratic equation and will have 2 solutions.
Add 80 to both sides of the equation:
4x^2 = 80
Divide both sides by 4:
x^2 = 20
Take the square root of both sides:
x = ± √20.
Shown here are the ages of audience members in the first row who attend an afternoon concert and an evening concert.
Afternoon concert: 27, 25, 48, 53, 34, 21, 29, 72,49, 39, 66, 14, 17
Evening concert: 33, 22, 27, 42, 39, 26, 36, 61, 34, 40, 26, 31, 34
Which box plot represents the data set?
The box plot that represents the data-set is given as follows:
Option C.
What is shown by the box and whisker plot?From left to right, the five features of the box and whisker plot are listed as follows
Minimum value.Lower quartile.Median.Upper quartile.Maximum value.The minimum and maximum values are given as follows:
Evening: 22 and 61. (42 is the non-outlier).Afternoon: 14 and 72.The median is of 34 concerts for each (middle value of the ordered data-sets), hence the plot is given by option C.
The quartiles are the mean of each half of the ordered data-sets.
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how does the formula for the sample mean differ from the formula for population mean?
The sample mean is the average of selected observations taken from population, whereas the population mean averages of whole population Sample mean: [tex]\bar{x}[/tex] = ∑x / n
Population mean: μ = ∑x / N
Sample mean is the representation of average of selected number of observation which is one of the set of the population.It is represented by x bar ( [tex]\bar{x}[/tex] ).Here 'n' is the sample size which one of the set of population .Formula of sample mean is [tex]\bar{x}[/tex] = ∑x / nPopulation mean is the average of whole population.It is represented by 'μ' .Here sample size 'N' whole population.Formula of population mean is μ = ∑x / NTherefore, the sample mean is average of a sample selected from population whereas population mean is average of whole population.
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A process that repeats a series of steps over and over until the desired outcome is obtained.
Answer:Iterative
Step-by-step explanation:
12 Colin used 2 5/6 sheets of paper and completed 1/6 of his report. How many pages was the completed report?
Answer:
below
Step-by-step explanation:
He needs 6 times as many as 1/6 th to have a complete report
6 * 2 5/6 = 6 * 17/6 = 102/6 = 17 pages total
Find the value of each variable, show proofs urgentttt
its a x, x, x√2 special triangle
so x and y are 19 <--- answer
2 angles are 90 & 45 so the third angle must be 45
that means x and y are equal
What is the difference between absolute and relative error?
Absolute error and relative error are two measures of the difference between an estimated or calculated value and the true or exact value of a quantity.
The main difference between absolute and relative error is that absolute error gives the magnitude of the difference between the estimated value and the true value, while relative error gives a measure of this difference relative to the size of the true value.
Absolute error is the magnitude of the difference between the estimated or calculated value and the true value.
It is calculated as the absolute value of the difference between the estimated value and the true value. Absolute error is expressed in the same units as the quantity being measured.
Relative error, on the other hand, is the absolute error expressed as a fraction or percentage of the true value. It is calculated as the absolute error divided by the true value, and is usually expressed as a percentage.
Relative error is a useful measure when the scale of the quantity being measured varies over a wide range, or when comparing the accuracy of measurements of different quantities.
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Use the triangle shown on the right to answer the
question.
Which equation can you use to solve for a?
a
30
sin (35°) sin(35°)
a
30
sin (35°) sin(60°)
a
30
sin (85⁰) sin(35°)
DONE ✔
C
35°
Answer is B and second one is 19.9
Answer:
Second option:
[tex]\mbox{\large \dfrac{a}{\sin(35^\circ)} = \dfrac{30}{\sin(60^\circ)}}[/tex]
Step-by-step explanation:
The law of sines states that the ratio of the sides of a triangle to the sine of the angle opposite the sides is the same for both sides
So we get
[tex]\dfrac{AB}{\sin 85} = \dfrac{BC}{\sin 35} = \dfrac{AC}{\sin B}}[/tex]
We are not given ∠B but we know the three angles of a triangle must add up to 180°
Therefore m∠B + 35 + 85 = 180
m∠B + 120 = 180
m∠B = 180 - 120 = 60°
and we also have AB = c. BC = a and AC = 30
Hence
[tex]\dfrac{c}{\sin 85} = \dfrac{a}{\sin 35} = \dfrac{30}{\sin 60}}\\\\\textrm{from which}\\\\ \dfrac{a}{\sin 35} = \dfrac{30}{\sin 60}}\\[/tex]
The equation which will yield the value of a will be : a/sin35 = 30/sin60
Given,
Triangle.
Here,
According to sine law,
30/sinB = c / sin85 = a/ sin35
Firstly calculate angle B .
Therefore m∠B + 35 + 85 = 180
m∠B + 120 = 180
m∠B = 180 - 120 = 60°
Here,
AB = c.
BC = a
AC = 30
Hence to calculate a ,
Use the proportion,
a/sin35 = 30/sin60
Thus equation 2 is correct .
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What are the labor supply and demand curves
The intersection of the labor supply and demand curves determines the equilibrium wage rate and quantity of labor.
The labor supply and demand curves are used to analyze the market of labor, where the demand is the amount of labor that employers are willing to hire at a given wage, and the supply is the amount of labor that individuals are willing to supply at a given wage. The labor supply curve is upward sloping and shows the quantity of labor supplied at different wages. Mathematically, this is represented as the equation: Qs = a + bw, where Qs is the quantity of labor supplied, a is a constant, b is the elasticity of labor supply, and w is the wage. The labor demand curve is downward sloping and shows the quantity of labor demanded at different wages. Mathematically, this is represented as the equation: Qd = c – dw, where Qd is the quantity of labor demanded, c is a constant, d is the elasticity of labor demand, and w is the wage. The intersection of the labor supply and demand curves determines the equilibrium wage rate and quantity of labor.
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The net of a right rectangular pyramid is shown.
What is the surface area of the right rectangular pyramid?
The surface area of the right rectangular pyramid is 96 sq. ft.
What is the net's surface area?A net pattern is produced when the surface of a three-dimensional figure or solid is spread out flat and each aspect of the shape is visible. The net may then be used to calculate the solid's surface area.
The surface area of the net is calculated by adding the areas of all of its faces. The net's surface area is calculated by summing the surface areas of all its forms.
The surface area of the given net is calculated by adding the area of all the individual shapes in the net.
For the given net the area of the triangle with h= 5 ft and b = 8 ft is:
A1 = 1/2(8)(5)
A1 = 20 sq. ft.
There are two such triangles thus:
A1 = 2(20) = 40 sq. ft
For the triangle with h = 6 ft and b = 4 ft:
A2 = 1/2)(4)(6)
A2 = 12
There are two such triangles thus:
A2 = 2(12) = 24 sq. ft
The area of the rectangle in the center is:
A3 = (8)(4)
A3 = 32 sq. ft
The total surface area of the net is:
A = A1 + A2 + A3
A = 40 + 24 + 32
A = 96 sq. ft.
Hence, the surface area of the right rectangular pyramid is 96 sq. ft.
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