Solution:
Given the data below:
From the question, 25 years is devoted to eating and working. Also, the number of years working will exceed the number of years eating food by 19 year.
Let x represent the number of years devoted to eating food and y represent the number of years devoted to workings.
Thus,
\(\begin{gathered} x\Rightarrow number\text{ of years for eating food} \\ y\Rightarrow number\text{ of years for working} \end{gathered}\)Thus, we have
\(\begin{gathered} x+y=25\text{ ---equation 1} \\ y=x+19\text{ ---- equation 2} \end{gathered}\)To solve the above simultaneous equations by substitution, we substitute equation 2 into equation 1.
Thus,
\(\begin{gathered} x+(x+19)=25 \\ open\text{ parentheses,} \\ x+x+19=25 \\ \Rightarrow2x+19=25 \\ subtract\text{ 19 from both sides of the equation,} \\ 2x+19-19=25-19 \\ \Rightarrow2x=6 \\ divide\text{ both sides by the coefficient of x, which is 2} \\ \frac{2x}{2}=\frac{6}{2} \\ \Rightarrow x=3 \end{gathered}\)Substitute the value of 3 for x into equation 2.
Thus,
\(\begin{gathered} y=x+19 \\ where\text{ x=3} \\ y=3+19 \\ \Rightarrow y=22 \end{gathered}\)Hence,
22 years will be spent on working and 3 years will be spent on eating food.
what is the function value of f(5) if f(x)=3x-2
Answer:
13
Step-by-step explanation:
If you plug in 5 for x you get...
f(5)= 3(5) - 2
f(5)= 15 - 2
Therefore, f(5) = 13
Answer:
f(5)=13 <- really the right answer this time haha
Step-by-step explanation:
f(5)=3(5)-2
=15-2
=13
please help! i dont understand this
Answer:
This is called absolute sign | | or something near to that...
Any number inside the | | will always be positive in the output. For example |3|= 3 and also |-3|= 3
|-x| = x (notice that)
That's the bottom line and the idea of this equation
You will substitute with the value of function g(x) in the function f(g(x)) = x
The value of g(x) is known as it states g(x) = -x
So when substituting it's going to be like that
f(-x) = -x (right)?
But notice they told you that
f(x) = |x| so as we stated earlier if it's
Anything inside the | | is always positive
So f(-x) = x ###
Why?
Because when we substitute
|-x| =x
please some help me with this.
In circle Z, BZ = FZ, BZ 1 CA, FZ 1 DC DF = 18 in.
What is BC?
Answer:
18 in.
Step-by-step explanation:
I just took the quiz
Answer:
The dimenssion of BC is - 18in.
Step-by-step explanation:
Definition of circle:
The set of all points in the plane that are a fixed distance (the radius) from a fixed point is called a circle . A radius is the distance between any two points on a circle and the center. Any two radii have the same length according to the definition of a circle.
Step 1:
in Δ\(ZFC\) and Δ\(ZFD\)
\(ZD = ZC\) ( Radius of the circle will be same )
\(ZF= ZF\) (Common side in both triangle)
\($\angle Z F C=L I P D=90^{\circ}[\because F Z \perp D C]\)
So from Side Angle Side theorem,
\($\triangle Z F C \cong \triangle Z f D$\)
So, \($F C=F D=18 in.\)
Step 2:
\($\triangle B C Z$\) and \($\triangle F C Z$\)
\($B Z=F Z \quad$\) (Given)
\(CZ = CZ\) (Common side in both the triangle)
\($\angle Z B C=\angle Z F C=90^{\circ} \quad[\because \overline{B Z} 1 \overrightarrow{C A}$\) and \($$\overline{F 2} \perp \overline{D C}]$$\)
So from sides side angle theorem,
Δ\(BCZ\)≅ Δ\(FCZ\)
So, \(BC = FC\)
Hence \(BC = 18in.\)
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Solve the exponential equation for x: 7(2x + 2) = 73x.
The answer is:
\( \frac{14}{59} \)Decimal form is 0.2372 is infinity
Explication:
7(2x +2 )= 73x (Remove the parentheses and sort out 7 and solve for each number that is in the parentheses)
14x+14=73x
14x=73-14
-59x=-14
Both sides are divided by -59 but the -59 / -59 is canceled
For questions 1 and 2, multiple answers may be selected
1. Circle the data that represents discrete data: The weight of cows The number of books in your apartment The color of your hair The ounces of water that you drink each day.
2. Circle the data that represents continuous data: The weight of cows The number of books in your apartment The color of your hair The ounces of water that you drink each day
The discrete data is (b) while the continuous data are (a) and (d)
What are discrete data?These are data that can be represented using positive whole numbers.
Using the above definition as a guide, the discrete data is (b) The number of books in your apartment
What are continuous data?These are data that can be represented using decimal numbers.
Using the above definition as a guide, the continuous data are (a) The weight of cows and (d) The ounces of water that you drink each day
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whats the equation of a line that passes through point (-1,3) with slope of 1
The equation of the line that passes through the point (-1, 3) with a slope of 1 is y = x + 4.
To find the equation of a line that passes through the point (-1, 3) with a slope of 1, we can use the point-slope form of a linear equation.
The point-slope form of a linear equation is given by:
y - y1 = m(x - x1)
where (x1, y1) represents the coordinates of a point on the line, and m represents the slope of the line.
Using the given point (-1, 3) and slope 1, we substitute these values into the point-slope form equation:
y - 3 = 1(x - (-1))
Simplifying:
y - 3 = x + 1
Now, we can rewrite the equation in the standard form:
y = x + 4
Therefore, the equation of the line that passes through the point (-1, 3) with a slope of 1 is y = x + 4.
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sin(60-theta)sin(60+theta)
Step-by-step explanation:
\( \sin(60 - \theta) \sin(60 + \theta) \\ = \{ \sin(60) \cos( \theta) - \sin( \theta) \cos(60) \} \{ \sin(60) \cos( \theta) + \cos(60) \sin( \theta) \} \\ = \{ \frac{ \sqrt{3} }{2} \cos( \theta) - \frac{1}{2} \sin( \theta) \} \{ \frac{ \sqrt{3} }{2} \cos( \theta) + \frac{1}{2} \sin( \theta) \} \\ \\ \)
from difference of two squares:
\({ \boxed{(a - b)(a + b) = ( {a}^{2} - {b}^{2} ) }}\)
therefore:
\( = \{ {( \frac{ \sqrt{3} }{2}) }^{2} { \cos }^{2} \theta \} - \{ {( \frac{ \sqrt{3} }{2} )}^{2} { \sin }^{2} \theta \} \\ \\ = \frac{3}{4} { \cos }^{2} \theta - \frac{3}{4} { \sin}^{2} \theta\)
factorise out ¾ :
\( = \frac{3}{4} ( { \cos }^{2} \theta - { \sin}^{2} \theta) \\ \\ = { \boxed{ \frac{3}{4} \cos(2 \theta) }}\)
Sophia earns straight commission selling cell phone contracts. Last month, she sold 341 cell phone contracts worth a total $38,192.00. If Sophia earns a 5.5% rate of commission, what was her income last month?
Answer:
i need help with that one too
Step-by-step explanation:
ahhhhhhhhhhhh
Answer:
1919.148
Step-by-step explanation:
Ur just to gay
f(x) = x2 + 12x +32
Find the roots of the function
Answer: Evaluate
Step-by-step explanation:
Now, when you click ROLL, the simulator will keep track of the average of all rolls so far. For example, if you roll 2 and then 4, the average will be 3. ROLL sides What is the average after 10 rolls
Step-by-step explanation:
Suppose the results obtained are numbers from 1 to 10, then after 10 rolls, the average is
(1+2+3+4+5+6+7+8+9+10)/10
= 55/10
= 5.5
Answer:
5 , 3 , 3.5 C) The average would approach a set value.
Step-by-step explanation:
The first three numbers don't matter it could be anyone 1-6.
The last answer is C
Calculate the area of this trapezium.
6 cm
4 cm
5 cm
8 cm
area=1/2(AB+0A)Ac=4cm
Answer:
28cm²
Step-by-step explanation:
Area of trapezium = 1/2×(6+8)×4
= 28cm²
FOUR CARS CRASH AT 5 MILES AN HOUR. Cost of the repairs are 422, 456, 401, and 215
COMPUTE RANGE
SAMPLE VARIANCE,
AND SAMPLE STANDARD DEVIATION
The range of the repairs to the cars is 241.
The sample variance is 11, 671.33
The sample standard deviation would be 108.03.
How to find the range ?Range = Maximum repair cost - Minimum repair cost
= 456 - 215
= 241
How to find the sample variance and standard deviation ?Find mean :
= (422 + 456 + 401 + 215) / 4
= 373. 5
Sample variance :
= Sum of ( each repair cost - mean ) ² / (Number of cars - 1)
= ( 2, 340.25 + 6, 812.25 + 756.25 + 25, 105.25 ) / ( 4 - 1 )
= 11, 671. 33
Sample standard deviation:
= √sample variance
= √11, 671. 33
= 108. 03
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f(n)=(x + 1)(x - 5)| has three solutions. What is the value of f(n)? How would you describe the location of this solution?
The equation given is a quadratic equation that has roots -1 and 5.
Roots of Quadratic EquationTo solve this problem, we have to find the roots of the quadratic equation and we can simply multiply through and then calculate the roots.
\((x+1)(x-5) = x^2 -5x + x - 5\\f(n) = x^2 -4x - 5\)
Let's solve this quadratic equation above.
Using factorization method, we can find the factors of the quadratic equation and simplify.
\(x^2 - 4x -5 = 0\\(x+1)(x-5) = 0\\x + 1 = 0\\or \\x - 5 = 0\\x = -1 or x = 5\)
The roots to the equation (x + 1)(x - 5) = 0 are - 1 and 5.
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Anna and Ravi are members of different clubs. Anna's club charges $25 per month. Ravi's club
charges $15 per month but has an annual fee of $40. After how many months will Anna and
Ravi have paid the same total amount?
Pls helppp
Mean, Median, Mode, Appropriate Measures, Standard
Deviation
Use this data set to answer all questions on this page.
513, 490, 496, 380, 490, 513, 503, 513, 500, 492
Question 1 Which of the following would be APPROPRIATE measure(s) of center. (1)Mean (2)Median (3) Mode. Question 2 Find the standard deviation. Round your answer to the tenths place(one decimal place)
Answer:
Question 1: The appropriate measures of center for this data set would be (1) Mean and (2) Median. There is no mode in this data set as there are no repeating values.
Question 2: To find the standard deviation, we first need to find the mean:
Mean = (513 + 490 + 496 + 380 + 490 + 513 + 503 + 513 + 500 + 492) / 10 = 494.0
Next, we find the difference between each data point and the mean:
(513 - 494.0), (490 - 494.0), (496 - 494.0), (380 - 494.0), (490 - 494.0), (513 - 494.0), (503 - 494.0), (513 - 494.0), (500 - 494.0), (492 - 494.0)
19, -4, 2, -114, -4, 19, 9, 19, 6, -2
Then we square each difference:
361, 16, 4, 12996, 16, 361, 81, 361, 36, 4
The sum of these squared differences is:
361 + 16 + 4 + 12996 + 16 + 361 + 81 + 361 + 36 + 4 = 14136
To find the variance, we divide the sum of squared differences by the number of data points minus one:
Variance = 14136 / 9 = 1570.7
Finally, we find the standard deviation by taking the square root of the variance:
Standard deviation = √1570.7 ≈ 39.6 (rounded to the tenths place)
Step-by-step explanation:
Which expressions have a value that is greater than 1?
Answer:
Im not sure about A but other then that B and D have greater values then one
Step-by-step explanation:
\(~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \boxed{A}\qquad \cfrac{3^{-2}}{3^3}\implies \cfrac{~~\frac{1}{3^2} ~~}{3^3}\implies \cfrac{~~\frac{1}{3^2} ~~}{\cfrac{3^3}{1}}\implies \cfrac{1}{3^3\cdot 3^2}\implies \cfrac{1}{3^5}\implies \cfrac{1}{243}\qquad \textit{\large \checkmark}\)
\(\boxed{B}\qquad \cfrac{5^3}{5^2}\implies 5^3\cdot 5^{-2}\implies 5^{3-2}\implies 5^1\implies 5\qquad \bigotimes \\\\\\ \boxed{C}\qquad 9^0\implies 1\qquad \bigotimes \\\\\\ \boxed{D}\qquad \cfrac{(2^3)^2}{2^2}\implies \cfrac{2^{3\cdot 2}}{2^2}\implies \cfrac{2^6}{2^2}\implies 2^6\cdot 2^{-2}\implies 2^4\implies 16\qquad \textit{\large \checkmark} \\\\\\ \boxed{E}\qquad \cfrac{2^3}{2^8}\implies 2^3\cdot 2^{-8}\implies 2^{3-8}\implies 2^{-5}\implies \cfrac{1}{2^5}\implies \cfrac{1}{32}\qquad \bigotimes\)
A bike path is 12.5 miles. Dominic is 70% of the way to the end. How far is Dominic on the path?
The percentage of the distance Dominic is on the path is his distance
travelled as a fraction of the total distance when equivalent to 100.
The distance he has travelled on the path is 8.75 miles.
The given parameter are;
Length of Dominic's path = 12.5 miles
The length of the way Dominic is to the end = 70%
Required:
The distance Dominic has travelled on the path
The distance Dominic has travelled, D is 70% of 12.5 miles.
70% of 12.5 miles = 70% × 12.5 miles = 8.75 miles
The distance Dominic has travelled on the path, D = 8.75 miles
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The length of a rectangular poster is 2 more inches than two times its width. The area of the poster is 84 square inches. Solve for the dimensions (length and width) of the poster.
Step-by-step explanation:
w = width
2w + 2 = Length
Area = W x L = 84 = w (2w+2)
84 = 2w^2 + 2w
0 = 2w^2 + 2w - 84 Use Quadratic Formula
a = 2 b=2 c = -84
to find
W = 6 then L = 14 inches
The diagram shows the sequence of three rigid transformations used to map TriangleABC onto TriangleA"B"C". What is the sequence of the transformations? rotation, then reflection, then translation
The sequence of the transformations are rotation, then translation, and then reflection.
What is a transformation?A transformation refers to the movement of a point from its original (initial) position to a new location.
In Geometry, there are different types of transformation and these include the following:
DilationReflectionRotationTranslationBased on the diagram (see attachment), we can logically deduce that the sequence of the transformations are rotation, then translation, and then reflection.
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Find the volume of the solid whose base is the semicircle y= squareroot( 16-x^2), where -4< x< 4 and whose cross section perpendicular axis are squares
The volume of the solid whose base is the semicircle y = √(16 - x²), where -4 < x < 4 and whose cross section perpendicular axis are squares is 256/3 unit³
To obtain the volume of a 3D shape, the cross-section area is discovered and then integrated across a predetermined limit. This technique is known as the cross-sectional method of volume fining. The area of the square base is determined in the given problem, and it is then integrated to determine the overall volume.
To find the volume we will first find the cross-sectional area and then integrate it with respect to x from -4 to 4.
Thus the volume is given as follows:
y = √(16 - x²)
V = ₋₄∫⁴ (√(16 - x²))² dx
V = ₋₄∫⁴ (16 - x²) dx
V = [16x - x³/3]₋₄⁴
V = (64 - 64/3 + 64 -64/3)
V = 256/3 unit³
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Which of the following option represent the measure of arc ra?
Explanation:
An arc measure is an angle the arc makes at the center of a circle
From the given question, we will have to apply the intersecting chord theorem
If two chords intersect in the interior of a circle, then the measure of each angle is one half the sum of the
measures of the arcs intercepted by the angle and its vertical angle.
\(\begin{gathered} In\text{ our case} \\ mThus
\(\begin{gathered} 71.4=\frac{1}{2}(65.6^0+mRA) \\ \\ mRA=2\times71.4-65.6^0 \\ mRA=77.2^0 \end{gathered}\)Thus, the answer is 77.2 degrees
An oil drum contains 6 3/11 litres of engine oil. Mr. Evans uses 2 7/9 litres of engine oil from the oil drum to maintain his car. How much oil is there in the oil drum now?
The oil left over in the oil drum after Mr. Evans use is 3 49/99 liters
What is a mixed fraction?Mixed fraction: A fraction represented with its quotient and remainder is a mixed fraction. For example, 2 1/3 is a mixed fraction, where 2 is the quotient, 1 is the remainder. So, a mixed fraction is a combination of a whole number and a proper fraction. It is also an improper fraction
given in the question that, an oil drum contains 6 3/11 liters of engine oil. Mr. Evans uses 2 7/9 liters of engine oil from the oil drum to maintain his car
An oil drum contains engine oil = 6 3/11 liters = 69/11 liters
Mr. Evans uses engine oil = 2 7/9 liters = 25/9 liters
so to find how much oil is there in the oil drum we need to subtract used oil from the total oil drum
which gives 69/11-25/9
= (69x9-25x11)/99
= (621-275)/99
=346/99 liters
in the mixed fraction we can write it as ,
= 3 49/99 liters
The oil left over in the oil drum after Mr. Evans use is 3 49/99 liters
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One brand of cola co fizz is sold in packs of 4*500ml for 2.50 another brand colo is sold in packs of 10 330mlfo $2 which brand is more expensive
Based on the given information, the second brand, Cola, is the more affordable option in terms of cost per milliliter compared to Co Fizz.
To determine which brand of cola is more expensive, we need to compare the cost per unit volume for each brand.
For the first brand, Co Fizz, a pack contains 4 bottles, and each bottle has a volume of 500 ml. The cost of the pack is $2.50. Therefore, the total volume in a pack is 4 * 500 ml = 2000 ml. To find the cost per milliliter (ml), we divide the total cost by the total volume: $2.50 / 2000 ml = $0.00125 per ml.
For the second brand, Cola, a pack contains 10 bottles, and each bottle has a volume of 330 ml. The cost of the pack is $2. Therefore, the total volume in a pack is 10 * 330 ml = 3300 ml. To find the cost per milliliter (ml), we divide the total cost by the total volume: $2 / 3300 ml ≈ $0.000606 per ml.
Comparing the two brands, we can see that the cost per milliliter for Co Fizz is $0.00125, while the cost per milliliter for Cola is approximately $0.000606.
Since the cost per milliliter for Co Fizz is higher than the cost per milliliter for Cola, it can be concluded that Co Fizz is more expensive in terms of price per unit volume.
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Given that f(x)= x^2+4, evaluate f(-2)
Answer:
f=-x^2/2-2
Step-by-step explanation:
Ahmad received a $1100 bonus. He decided to invest it in a 2-year certificate of deposit (CD) with an annual interest rate of 1.14% compounded daily.
Answer the questions below. Do not round any intermediate computations, and round your final answers to the nearest cent. If necessary, refer to the
list of financial formulas. Assume there are 365 days in each year.
(a) Assuming no withdrawals are made, how much money is in Ahmad's
account after 2 years?
(b) How much interest is earned on Ahmad's investment after 2 years?
The interest that have been earned after two years is $25.
What is the compound interest?A type of interest known as compound interest is computed using both the original sum and any accrued interest from earlier periods. The interest that is earned on interest is, in other terms, interest.
We know that by the compound interest formula;
A = P(1 + r/n)^nt
A = amount
P = principal
r = rate
n = Number of times compounded
t = time
Thus;
A = 1100(1 + 0.0114/365)^365* 2
A = $ 1125
Thus the interest after two years is;
$ 1125 - $1100
= $25
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What is the answer to this?
Answer:
B
Step-by-step explanation:
x + 3y = 2 → (1)
4x - 3y = 23 → (2)
adding (1) and (2) term by term will eliminate y
(x + 4x) + (3y - 3y) = 2 + 23
5x + 0 = 25
5x = 25 ( divide both sides by 5 )
x = 5
Round 317,675 to the nearest ten thousand
Answer:320000
Step-by-step explanation:
These steps were used to construct the perpendicular bisector of segment KL. Which statement MUST be true?
Answer:
The statement that must be true is;
\(KU=UL\)Explanation:
Since the line is constructed to bisect line segment KL.
Bisecting line KL means it will be divided into two equal halves.
The point of bisection of the Line KL is U. So, line KU must be equal to line UL.
Therefore, the statement that must be true is;
\(KU=UL\)Which equation below allows you to solve 2x2 - 15 = x Using the zero-product property?
Answer:
A is the correct answer .
Step-by-step explanation:
Hope this helps .
The equation that allows you to solve the given equation is (x-3)(2x+5).
What is a quadratic equation?Any equation of the form \(ax^{2} +bx+c=0\) is called a quadratic equation where a is non-zero.
The given quadratic equation is:
\(2x^{2} -15=x\)
\(2x^{2} -x-15=0\)
\(2x^{2} -6x+5x-15=0\)
\(2x(x-3)+5(x-3)=0\)
\((x-3)(2x+5)=0\).......(1)
So, the required equation is equation(1).
Hence, the equation that allows you to solve the given equation is (x-3)(2x+5).
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