Answer:
[tex]w=\frac{A}{l}[/tex]
Step-by-step explanation:
The formula to find the area of a rectangle is: [tex]A=w \times l[/tex], where [tex]w[/tex] is width and [tex]l[/tex] is length.
So, if we knoe the area [tex]A[/tex] and the length [tex]l[/tex], we can find the width with the formula
[tex]w=\frac{A}{l}[/tex]
You can get this answer by using the defintion of area, which is the first equation, and isolating [tex]w[/tex].
Remember, when we want to move a factor to the other side of the equalty, we must pass it with the opposite operation. So, in this case, width was multiplying, and it passed to the other side dividing.
Therefore, the answer here is [tex]w=\frac{A}{l}[/tex]
The product of (a − b)(a − b) is a2 − b2.
A. Sometimes
B. Always
C. Never
The correct option is C. Never The product of (a - b)(a - b) is always equal to a² - 2ab + b².
The product of (a - b)(a - b) can be expanded using the distributive property:
(a - b)(a - b) = a(a) - a(b) - b(a) + b(b)
Simplify by multiplying the terms:
= a² - ab - ab + b²
Combine like terms:
= a² - 2ab + b²
As you can see, the product of (a - b)(a - b) is a² - 2ab + b², not a² - b².
However, there is a well-known algebraic identity called the difference of squares, which states that a² - b² can be factored as (a + b)(a - b). So, the correct statement is:
(a - b)(a - b) is equivalent to a² - 2ab + b², not a² - b².
Therefore, the answer is C. Never the product of (a - b)(a - b) is always equal to a² - 2ab + b².
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A new board game comes with a deck of 20 cards: 5 red, 3 blue, 2 orange, and 10 green.
After the deck is shuffled, the player is to choose the top card and note its color, replace
the card, shuffle the deck again, and then choose the top card again and note its color.
What is the probability that both cards selected are blue?
Choose the correct absolute value inequality and graph for the solution -1.2≤x≤2
options:
|5x-2|>=8
|5x-2|<=8
Answer:
[tex]\large\boxed{|5x-2|\leq8}[/tex]
Step-by-step explanation:
[tex]-1.2\leq x\leq2\qquad\text{multiply all sides by 5}\\\\-6\leq5x\leq10\qquad\text{subtract 2 from both sides}\\\\-8\leq5x-2\leq8\iff|5x-2|\leq8[/tex]
For the pair of triangles below, determine whether or not the triangles are similar. If they are similar, show your reasoning in a flowchart. If they are not similar, explain how you know.
Answer:
The triangles are similar
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional
step 1
In the right triangle FED
Find the length of side FD
Applying the Pythagoras Theorem
[tex]FD^{2}=FE^{2}+DE^{2}[/tex]
substitute the given values
[tex]FD^{2}=3^{2}+4^{2}[/tex]
[tex]FD^{2}=25[/tex]
[tex]FD^{2}=5\ units[/tex]
step 2
In the right triangle BUG
Find the length of side GU
Applying the Pythagoras Theorem
[tex]BG^{2}=BU^{2}+GU^{2}[/tex]
substitute the given values
[tex]10^{2}=6^{2}+GU^{2}[/tex]
[tex]GU^{2}=100-36[/tex]
[tex]GU^{2}=8\ units[/tex]
step 3
Find the ratio of its corresponding sides
If the triangles are similar
[tex]\frac{FD}{BG}=\frac{FE}{BU}=\frac{DE}{GU}[/tex]
substitute the given values
[tex]\frac{5}{10}=\frac{3}{6}=\frac{4}{8}[/tex]
[tex0.5=0.5=0.5[/tex] -----> is true
therefore
The triangles are similar
Can someone let me know if I simplified these equations correctly or at least show me how to do it?
Answer:
Your work is correct as far as it goes. Now eliminate the terms that are zero.
Step-by-step explanation:
Multiplying anything by zero gives zero. Adding zero is like adding nothing. Zero is called the "additive identity element" because ...
a + 0 = a
Adding zero doesn't change anything. You can (and should) drop the zero if your goal is to simplify the expression.
[tex]a. \quad x_{f}=v_{0}\\\\b. \quad x_{f}=v_{0}t\\\\c. \quad v_{f}^2=v_{0}^2[/tex]
If you were to place $2500 in a savings account that pays 3% interest compound continually how much money will you have after 5 years. Assume you make no other deposits or withdrawals.
[tex]\bf ~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$2500\\ r=rate\to 3\%\to \frac{3}{100}\dotfill &0.03\\ t=years\dotfill &5 \end{cases} \\\\\\ A=2500e^{0.03\cdot 5}\implies A=2500e^{0.15}\implies A\approx 2904.59[/tex]
Answer:
C. $2904.59
Step-by-step explanation:
Compounded continually means that the principal amount is constantly earning interest and the interest keeps earning on the interest earned.
The formula to apply is
[tex]A=Pe^{rt}[/tex]
where A is the amount, P is the principal, r is rate of interest, t is time in years and e is the mathematical constant
Taking
e=2.7183, P=$2500, r=3% and t=5 years
[tex]A=Pe^{rt} \\\\\\A=2500*2.7183^{0.03*5} \\\\\\A=2500*1.1618\\\\\\A=2904.59\\\\A=2904.59[/tex]
What is the degree of vertex B?
Answer:
2
Step-by-step explanation:
The degree of the vertex B is 2 because from vertex B there are 2 line segments coming out of it.
Another example, C has degree 4 because from it there are 4 line segments coming from it.
The cost in dollars to manufacture x pairs of shoes is given by 12,000 + 19x. This month, the manufacturer produced 1000 more pairs of shoes than last month. The average cost per pair dropped by $0.43.
a) Write an expression for the average cost per pair of shoes. Use this expression to write an equation to represent there situation.
b) Solve your equation
c) Are there any mathematical restrictions on the domain? Explain.
d) Determine reasonable domain in the context of the problem. Use your answers to parts I and II to answer the question.
Answer:
(a) The expression for the average cost per pair of shoes is [tex]A(x)=\frac{12000}{x}+19[/tex] and equation for the situation is [tex]\frac{12000}{x}+19-(\frac{12000}{x+1000}+19)=0.43[/tex].
(b) x=[tex]x\approx 4806[/tex]
(c) The average function is not defined for x=0, so the domain of the function is all real numbers except 0.
(d) The reasonable domain is all natural numbers.
Step-by-step explanation:
The cost in dollars to manufacture x pairs of shoes is given by
[tex]C(x)=12000+19x[/tex]
where, x is the pairs of shoes.
(a)
The expression for the average cost per pair of shoes.
[tex]A(x)=\frac{C(x)}{x}[/tex]
[tex]A(x)=\frac{12000+19x}{x}[/tex]
[tex]A(x)=\frac{12000}{x}+19[/tex]
This month, the manufacturer produced 1000 more pairs of shoes than last month. The average cost per pair dropped by $0.43.
[tex]A(x)-A(x+1000)=0.43[/tex]
[tex]\frac{12000}{x}+19-(\frac{12000}{x+1000}+19)=0.43[/tex]
Therefore the expression for the average cost per pair of shoes is [tex]A(x)=\frac{12000}{x}+19[/tex] and equation for the situation is [tex]\frac{12000}{x}+19-(\frac{12000}{x+1000}+19)=0.43[/tex].
(b)
On solving the above equation we get
[tex]\frac{12000}{x}-\frac{12000}{x+1000}=0.43[/tex]
[tex]\frac{12000000}{x^2 + 1000 x} = 0.43[/tex]
[tex]12000000=0.43(x^2 + 1000 x)[/tex]
[tex]12000000=0.43x^2 + 430x[/tex]
[tex]0=0.43x^2 + 430x-12000000[/tex]
Using graphing calculator we get
[tex]x\approx -5806.31,4806.31[/tex]
The pair of shoe can not be native and decimal value.
[tex]x\approx 4806[/tex]
Therefore the solution is [tex]x\approx 4806[/tex].
(c)
The average cost function is
[tex]A(x)=\frac{12000}{x}+19[/tex]
The function is not defined if the denominator is 0.
The above function is not defined for x=0, so the domain of the function is all real numbers except 0.
(d)
In the average function x represents the number of pair of shoe.
It means the value of x must be a positive integer.
Since the average function is not defined for x=0, So the reasonable domain of average function is
Domain={x : x∈Z⁺, x≠0}
Domain=N
Therefore the reasonable domain is all natural numbers.
Tina, the owner of a home and garden store, lends $8,000 to Lana to help her open an art shop. Lana plans to repay Tina at the end of eight years with interest compounded semiannually at 8%. Using the tables found in the textbook, you can determine that at the end of eight years, Tina will receive A. $14,484. B. $14,984. C. $16,587. D. $16,857.
Answer:
B. $14,984
Step-by-step explanation:
The multiplier is ...
(1 +r/n)^(nt) . . . . where r is the nominal annual rate, n is the number of times interest is compounded per year, and t is the number of years.
Here, that multiplier is ...
(1 +.08/2)^(2·8) = 1.04^16 ≈ 1.87298
Then Lana will be paying Tina ...
$8000×1.87298 ≈ $14984
at the end of 8 years.
A plane flies with an average velocity of -98.5 m/s for 45.0s .What is the displacement?
Answer:
-4432.5 m
Step-by-step explanation:
Displacement is measured in meters, so will be the product of velocity in m/s and time in s.
(-98.5 m/s)×(45.0 s) = -4432.5 m
___
If you're concerned with significant figures, you can round this to -4430 m, which has the required 3 significant figures.
Answer:
-4432.5 m
Step-by-step explanation:
distance (or displacement) = rate times time.
Here, the displacement is
(-98.5 m/s)(45.0 s) = -4432.5 m
These long term behaviors are very hard to understand.
the first one
the degree of the polynomial in the numerator is 2.
the degree of the polynomial in the denominator is 2.
when the top and bottom have the same degree, like in this case, the horizontal asymptotes that that can afford us is simply the value of their coefficients.
[tex]\bf \cfrac{x^2-16}{x^2+2x+1}\implies \cfrac{1x^2-16}{1x^2+2x+1}\implies \stackrel{\textit{horizontal asymptote}}{y=\cfrac{1}{1}\implies y=1}[/tex]
for the second one
well, the degree of the numerator is 3.
the degree of the denominator is 2.
when the numerator has a higher degree than the denominator, there are no horizontal asymptotes, however, when the degree of the numerator is exactly 1 degree higher than that of the denominator, the rational has an oblique or slant asymptote, and its equation comes from the quotient of the whole expression, check the picture below, the top part.
for the third one
this one is about the same as the one before it, the numerator has exactly one degree higher than the denominator, so we're looking at an oblique asymptote, check the picture below, the bottom part.
Which statement is true about the end behavior of the graphed function?
As the x-values go to positive infinity, the function's values go to negative infinity.
As the x-values go to zero, the function's values go to positive infinity.
As the x-values go to negative infinity, the function's values are equal to zero.
As the x-values go to negative infinity, the function's values go to positive infinity.
Answer:
Option D (As the x-values go to negative infinity, the function's values go to positive infinity).
Step-by-step explanation:
The graphed function shows a curve which has two turning points and three x-intercepts, which means it is a cubic polynomial. To check which statement is true, we will check all the statements one by one.
Option A) The graph shows that after the second turning point, the function starts to increase. Which means that as x-values increase, the function values will approach positive infinity. Therefore, option A is incorrect.
Option B) This option is incorrect because the graph explicitly shows that f(0) = 0, which means that when x = 0, the function value is also 0.
Option C) This option is incorrect because the function value is 0 at the x-value = 0, as shown in the graph. It can be also seen that As the x-values go to negative infinity, the function's values go to positive infinity since the value of the function decreases as the value of x decreases. Hence Option D is the correct answer!!!
Answer:
The correct option is D.
Step-by-step explanation:
Consider the provided graph of the function.
As the x values go to positive infinity or negative infinity the function value increase or goes to positive infinity.
The end behavior of the function is,
[tex]f(x)\rightarrow +\infty, as x\rightarrow -\infty[/tex]
[tex]f(x)\rightarrow +\infty, as x\rightarrow +\infty[/tex]
Now consider the provided options.
Option A is incorrect because As the x-values go to positive infinity, the function's values go to positive infinity.
Option B is incorrect because As the x-values go to zero, the function's values doesn't go to positive infinity.
Option C is incorrect because As the x-values go to negative infinity, the function's values are not equal to zero.
Option D is the correct option because As the x-values go to negative infinity, the function's values go to positive infinity.
Therefore, the correct option is D.
The hypotenuse of a right triangle is three times the length of one of its legs. The length of the other leg is four feet. Find the
lengths of the three sides of the triangle. For non-integer answer(s), round your answer(s) to the nearest tenth.
Answer:
Step-by-step explanation:
Let the other leg = x
x^2 + 4^2 = (3x)^2
x^2 + 4^2 = 9x^2
4^2 = 9x^2 - x^2
16= 8x^2
16/8 = x^2
x^2 = 2
x = sqrt(2)
The lengths of the sides
x = sqrt(2)
other side =4
hypotenuse = 3*sqrt(2)
x = 1.4
other side= 4
hypotenuse = 3*1.4142
hypotenuse = 4.2
Answer:
4 feet, 1.4 feet, 4.2 feet
Step-by-step explanation:
We are looking for the lengths of the three sides of a right triangle. We are given that one leg has length 4ft. Let x be the length of the other leg. Since the hypotenuse of the right triangle is three times the length of this leg, we can represent the hypotenuse as 3x. This is a right triangle, so we can use the Pythagorean Theorem to find x.
42+x216+x2=(3x)2=9x2
Subtracting x2 from both sides, then dividing by 8 to isolate the x, we have
8x2x2x=16=2=±2–√
Considering only the positive value for x, the lengths of the three sides of the triangle are approximately 4 feet, 2–√≈1.4 feet, and 32–√≈4.2 feet.
Proportions in Triangles (10)
A vine maple grows fast when it is planted under the cover of cedar trees. One month after it is planted it has grown 12 inches, and after eight weeks it had grown 19 inches. Write an equation that models the growth, in inches, of the vine maple as a function of time, in weeks.
Answer:
y = (7/4)(x -4) +12
Step-by-step explanation:
The rate of growth is ...
(19 in -12 in)/(8 wk -4 wk) = 7/4 in/wk
Using this slope in a point-slope form of the equation for a line, we get ...
y = m(x -h) +k . . . . . line with slope m through point (h, k)
y = (7/4)(x -4) +12 . . . . . line with slope 7/4 through the point (4 wk, 12 in)
The perimeter of a triangle with two equal sides is 50 cm. If its base were lengthened by 3 cm and each leg were shortened by 4 cm, all three sides would be equal. Find the length of the base of the original triangle.
Answer:
Base of the original triangle is 12 cm.
Step-by-step explanation:
Let base of triangle be x
two equal legs of triangles by y
therefore perimeter of triangle
x+y+y = 50 or x+2y =50
according to the question
if base is x+3 and leg is y-4
then both are equal
that is x+3 = y-4
y-x = 7 or y =x+7
x+2y =50
x+2(x+7) = 50
x+2x +14 =50
3x +14 =50
3x = 50 -14
3x = 36
x = 12
therefore base of the original triangle is 12 cm
In the coin value formula, V(t)= P(1+r)^t, which parts form the base of the exponential function? Which parts from the constant, or initial value? Which parts form the exponent?
Answer:
Step-by-step explanation:
The base of the exponential function is 1 + r.
The initial value is P.
The exponent is t.
The base of the exponential function is 1 + r
exponent is t, and
initial value is P
What is exponential function?The mathematical expression for an exponential function is f (x) = a ˣ, where “x” denotes a variable and “a” denotes a constant. This constant is referred to as the base of the function and should be greater than zero. The most common use exponential function is with base e
Given A coin formula V(t) = P(1+r)^t
to find the initial value put t = 0
V(0) = P(1+r)⁰
V(0) = P
P is the initial value
and exponent is the term which is in the power of any exponential function
here t is exponent and (1+r) is base function
Hence according to coin formula The base of the exponential function is 1 + r; exponent is t; and initial value is P.
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Name an intersection of plane GFL and plane that contains points A and C
The intersection of plane GFL and a plane that contains points A and C can be any plane that passes through those two points.
In mathematics, an intersection of two planes is the set of points that are common to both planes.
In this case, we want to find the intersection of plane GFL and a plane that contains points A and C.
Since both points A and C lie on the same plane, any plane that contains both points A and C would intersect plane GFL at those points.
Therefore, any plane that passes through points A and C would be an intersection of plane GFL and a plane that contains points A and C.
Examples of planes that contain points A and C are:
A plane that contains the line segment AC
A plane that is perpendicular to line AC at point A
A plane that is perpendicular to line AC at point C
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Proportions in Triangles (3)
Answer:
7 6/7
Step-by-step explanation:
Parallel segment BD creates triangle BDC similar to triangle AEC. The sides and segments of similar triangles are proportional:
x/11 = 5/7
x = 55/7 = 7 6/7 . . . . . multiply by 11
WANT FREE 20 POINTS + BRAINLIEST?
Help me with the geometry question and I got you
Answer:
a) J, K, W
b) any of X, Y, or P
c) 1 line
Step-by-step explanation:
a) The figure shows points J, K and W on line m.
b) Any points in the diagram other than J, K, and W are not on line m. Those include points X, Y, and P. Your answer will be one or more of these.
c) Two points define 1 line. There is only one line through any given pair of points. It can be named many ways, but it is still the same (one) line.
Answer:
1) J, K, W
2) any of X, Y, or P
3) Only one line (pyx)
Step-by-step explanation:
1) The figure shows points J, K and W on line m.
2) All points in the diagram except for j, w, and k are not on line m. These include points x, y, and p. Your answer should be one or more of these.
3) Three points define 1 line. There is only one line through any given group of points. It can be named many ways, but it will remain (one) line. The line would run through the points p, y, and x.
Hope this helps
- Que
Expected Value (50 points)
Game: Roll two dice. Win a prize based on the sum of the dice.
Cost of playing the game: $1
Prizes:
Win $10 if your sum is odd.
Win $5 if you roll a sum of 4 or 8.
Win $50 if you roll a sum of 2 or 12.
1.Explain HOW to find the expected value of playing this game. What is the expected value of playing this game? Show your work. (30 points)
2.Interpret the meaning of the expected value in the context of this game. Why should someone play or not play this game. Answer in complete sentences. (20 points)
Answer:
the expected value is if your sum is odd because half of the values you could roll are odd witch means you have 50% chance to get odd
because their are not high odds of getting something good
Can you use the Law of Cosines in the triangle below? Why or why not?
Answer:
Yes
Step-by-step explanation:
The law of cosines relates the three sides of a triangle with the cosine of the angle opposite one of them. It is useful for finding an angle of the triangle when only the side lengths are given, as here.
[tex]cos\frac{x}{2} =[/tex]±[tex]\sqrt{\frac{1+cosx}{2} }[/tex], if A=[tex]\frac{x}{2}[/tex] then cosA=
Answer:
[tex]\cos{A}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}[/tex]
Step-by-step explanation:
[tex]\cos{A}=\cos{\frac{x}{2}}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}[/tex]
Apparently, you're supposed to recognize that the formula tells you the value of cos(x/2).
Evaluate 3x3 − 2x2 for x = -2.
Step-by-step explanation:
3x3-2x2
3(-2)3-2(-2)2
-6×3+4×2
-18+8
-10
I hope it will help you!
Answer:
-10
Step-by-step explanation:
Yes. All you have to remember is that double negatives result in POSITIVES.
I am joyous to assist you anytime.
Please help me!
The angle of elevation of the top of a tower to a point on the ground is 61°. At a point 600 feet farther from the base, in line with the base and the first point and in the same plane, the angle of elevation is 32°. Find the height of the tower.
Answer:
573.6 ft
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you of the relationship of right triangle sides and angles:
Tan = Opposite/Adjacent
This tells us ...
tan(61°) = (height)/(distance to first point)
or
distance to first point = height/tan(61°)
Likewise, ...
distance to second point = height/tan(32°)
Then the difference of the distances is ...
distance to second point - distance to first point
= height/tan(32°) -height/tan(61°)
600 ft = height × (1/tan(32°) -1/tan(61°))
Dividing by the coefficient of height, we have ...
height = (600 ft)/(1/tan(32°) -1/tan(61°)) ≈ (600 ft)/(1.04603) ≈ 573.6 ft
Answer:
574
Step-by-step explanation:
I am have trouble with these x-intercepts. Please help me.
Answer:
x=8, x=2 no solution no solutionStep-by-step explanation:
For the equation ...
y = a(x -h)² +k
you can find the x-intercepts by setting y=0 and solving for x.
0 = a(x -h)² +k
-k = a(x -h)² . . . . . . subtract k
-k/a = (x -h)² . . . . . divide by a
±√(-k/a) = x -h . . . . take the square root
h ± √(-k/a) = x . . . . add h . . . . this is the general solution
__
So, for each of your problems, fill in the corresponding numbers and do the arithmetic. If (-k/a) is a negative number, the square root gives imaginary values, so there is "no solution".
1. x = 5 ± √9 = {5 -3, 5 +3} = {2, 8} . . . . the x-intercepts are 2 and 8
2. x = -3 ± √(-2) . . . . . . no solution; the roots are complex
3. x = 5 ± √(-8/4) . . . . . no solution; the roots are complex
Answer:
Step-by-step explanation:
These are all done the exact same way. I'll do the first one in its entirety, and you can do the rest, following my example.
Finding x-intercepts means that you find the places in the polynomial where the graph of the function goes through the x-axis. Here, the y-coordinates will be 0. To find these x-intercepts, you have to set y equal to 0 and then factor. First, though, we need to know exactly what the polynomial looks like in standard form. The ones you have are all in vertex form. We find the standard form by first expanding the binomial, like this:
[tex]0=(x-5)(x-5)-9[/tex]
FOIL those out to get
[tex]x^2-10x+25-9=0[/tex]
Combine like terms to get
[tex]0=x^2-10x+16[/tex]
Now we have to factor that. I'll use regular old factoring, although the quadratic formula will work also.
In our quadratic, a = 1, b = -10 and c = 16
The product of a * c = 16. The factors of 16 are:
1, 16
2, 8
4, 4
Some combination of those factors will give us a -10, the b term. 2 and 8 will work, as long as they are both negative. -2 + -8 = -10. Fit them into the polynomial with the absolute value of the largest number named first:
[tex]x^2-8x-2x+16=0[/tex]
Now we group them by 2's without ever changing their order:
[tex](x^2-8)-(2x+16)=0[/tex]
and then factor out the common thing in each set of parenthesis. The common thing in the first set of parenthesis is an x; the common thing in the second set is a 2:
[tex]x(x-8)-2(x-8)=0[/tex]
Now the common thing is (x - 8), so we factor that out and group together in a separate set of parenthesis what's left over:
[tex](x-8)(x-2)=0[/tex]
By the Zero Product Property, either x - 8 = 0 or x - 2 = 0. Solving the first one for x:
x - 8 = 0 so x = 8
Solving the second one for x:
x - 2 = 0 so x = 2
The 2 solutions are x = 2 and x = 8, choices a and d.
What is the third term in the binomial expansion of (3x+y^3)^4
Answer:
The last choice is the one you want.
Step-by-step explanation:
Use the 5th row of Pascal's Triangle. Since you have a 4th degree polynomial, there will be 5 terms in it. The 5 coefficients, in order, are:
1, 4, 6, 4, 1
We will use these coefficients only up to and including the third one, since that is the one you want. Binomial expansion using Pascal's Triangle looks like this:
[tex]1(3x)^4(y^3)^0+4(3x)^3(y^3)^1+6(3x)^2(y^3)^2+...[/tex]
That third term is the one we are interested in. That simplification gives us:
[tex]6(9x^2)(y^6)[/tex]
Multiply 6 and 9 to get 54, and a final term of:
[tex]54x^2y^6[/tex]
The third term of the given binomial expansion is [tex]54(x^{2})(y^{5})\\[/tex]
What is binomial expansion?The binomial expansion is based on a theorem that specifies the expansion of any power [tex](a+b)^{m}[/tex] of a binomial (a + b) as a certain sum of products [tex]a^{i} b^{i}[/tex], such as (a + b)² = a² + 2ab + b².
How to find the third term in the binomial expansion of (3x+y^3)^4 ?We know that the binomial expansion of [tex](a+b)^{m}[/tex] can be written as [tex]mC_{0}(a^{m-0}) +mC_{1}(a^{m-1})b+ mC_{2}(a^{m-2})b^{2}+..................+mC_{m}b^{m}[/tex]So the (r+1)th term will be [tex]mC_{r}(a^{m-r})b^{r}[/tex]The given term is [tex](3x + y^{3}) ^{4}[/tex]
The third term in the expansion will be
[tex]4C_{2}(9x^{2})(y^{3})^{2}\\ = 54(x^{2})(y^{5})\\[/tex]
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Emails arrive at the server of a company at the rate of an average of 10 per hour. It is assumed that a Poisson process is a good model for the arrivals of the emails. What is the probability (to 2 decimal places) that the time between two consecutive emails is more than two minutes?
Answer:
0.37
Step-by-step explanation:
we have given that emails arrives at the server at the rate of 10 per hour means [tex]\frac{10}{60}=0.166[/tex] per minute
we have to find the probability that the time difference between the two email is more than 2 minute
so probability [tex]P\left ( X> 2 \right )=e^{-2\lambda }=e^{-2\times 0.166}=0.7166[/tex]
The probability that the time between two consecutive emails arriving at the server is more than two minutes is 0.72 (or 72%).
Given:
- Average rate of email arrivals [tex](\( \lambda \))[/tex] = 10 per hour
1. Understanding the Poisson Process:
- In a Poisson process, the time between events (in this case, email arrivals) follows an exponential distribution.
- If [tex]\( \lambda \)[/tex] is the average rate of events per unit time (here, per hour), the time between events (interarrival time) T follows an exponential distribution with parameter [tex]\( \lambda \)[/tex].
2. Parameter Conversion:
- Since [tex]\( \lambda = 10 \)[/tex] emails per hour, we convert this to the rate per minute:
[tex]\[ \lambda_{\text{minute}} = \frac{10}{60} = \frac{1}{6} \text{ emails per minute} \][/tex]
3. Probability Calculation:
- We are interested in the probability that the time between two consecutive emails is more than two minutes.
- Let X denote the time between two consecutive emails. X follows an exponential distribution with rate [tex]\( \lambda_{\text{minute}} = \frac{1}{6} \)[/tex].
[tex]\[ P(X > 2) = e^{-\lambda_{\text{minute}} \cdot 2} \][/tex]
Substitute [tex]\( \lambda_{\text{minute}} = \frac{1}{6} \)[/tex]:
[tex]\[ P(X > 2) = e^{-\frac{1}{6} \cdot 2} \] \[ P(X > 2) = e^{-\frac{1}{3}} \][/tex]
4. Calculating the Probability:
- Use a calculator to find [tex]\( e^{-\frac{1}{3}} \)[/tex].
[tex]\[ e^{-\frac{1}{3}} \approx 0.7165 \][/tex]
Therefore, the probability that the time between two consecutive emails is more than two minutes is approximately 0.72 (rounded to two decimal places).
This result aligns with the characteristics of a Poisson process with an average arrival rate of 10 emails per hour.
What remainder does the sum 2222+2333 leave after division? Each one has an answer! Need answer quickly! 18 points!
by 4?
by 6?
by 9?
by 12?
2222 = 2220 + 2 = 555 * 4 + 2
2333 = 2332 + 1 = 583 * 4 + 1
Then
2222 + 2333 = (555 + 583) * 4 + 3
leaving a remainder of 3.
Dividing by 62222 = 2220 + 2 = 370 * 6 + 2
2333 = 2328 + 5 = 388 * 6 + 5
Then
2222 + 2333 = (370 + 388) * 6 + 7 = (370 + 388 + 1) * 6 + 1
leaving a remainder of 1.
Dividing by 92222 = 2223 - 1 = 741 * 3 - 1
2333 = 388 * 6 + 5 = (388 * 2) * 3 + 5 = (388 * 2 + 1) * 3 + 2
Then
2222 + 2333 = (741 + 388 * 2 + 1) * 3 + 1
leaving a remainder of 1.
Dividing by 122222 = 555 * 4 + 2 = 185 * 3 * 4 + 2 = 185 * 12 + 2
2333 = 2400 - 67 = 2400 - 60 - 7 = (200 - 5) * 12 - 7
Then
2222 + 2333 = (185 + 200 - 5) * 12 - 5
leaving a remainder of -5, or 7. (because 12 - 5 = 7)
Need some help with this
Answer:
y = 5x - 11
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here slope m = 5, hence
y = 5x + c ← is the partial equation
To find c substitute (1, - 6) into the partial equation
- 6 = 5 + c ⇒ c = - 6 - 5 = - 11
y = 5x - 11 ← equation of line