The required probability will be 127/128 that getting at least one tail when tossing seven.
We know that the total number of sides on a coin [Tail, Heads] =2
The probability of getting a tail = 1/2
The probability of getting no tail = 1 -1/2 = 1/2
According to the "at least once" rule, when a coin is tossed n times, the chance of obtaining at least one tail is given by:-
P(at least one tail) = 1 - [P(no tail)]ⁿ
In this case, n=7
Then, the probability of getting at least one tail is given by:-
P(at least one tail) = 1 - (1/2)⁷
P(at least one tail) = 1 - (1/128)
P(at least one tail) = 127/128
Thus, the required probability will be 127/128 that getting at least one tail when tossing seven.
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A store sells two competitive products, A and B. A model for the revenue from selling qA units of product A and qB units of product B is R = 40qA + 50qB − 6qA2 − 9qB2 − 4qAqB. What values of qA and qB maximize the revenue? (Fractional amounts of the products are permitted)
In differentiation , qA = 13/5 , qB = 11/5 are values of qA and qB maximize the revenue .
What does mathematics differentiation serve?
In mathematics, differentiation is used to compute rates of change. For instance, in mechanics, velocity is the amount at which a displacement changes over time.
The acceleration is the speed at which velocity is changing with respect to time.
R = 40qA + 50qB − 6qA2 − 9qB2 − 4qAqB
Let aA = x , qB = y
so,
R= 40x + 50y - 6x² - 9y² - xy
Partially differentiate above equation with respect to x and y .
Rx = 40 - 12x - 4y
Ry = 50 - 18y - 4y
Set Rx = 0 and Ry = 0 solve x and y .
40 - 12x - 4y = 0
50 - 18y - 4x = 0
Solving above questions
x = 13/5 , y = 11/5
therefore,
qA = 13/5 , qB = 11/5
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Assume the acceleration of the object is a(t) = −32 feet per second per second. (Neglect air resistance.)
A balloon, rising vertically with a velocity of 16 feet per second, releases a sandbag at the instant when the balloon is 48 feet above the ground.
(a) How many seconds after its release will the bag strike the ground? (Round your answer to two decimal places.)
(b) At what velocity will it strike the ground? (Round your answer to three decimal places.)
(a) 2.79 seconds after its release the bag will strike the ground.
(b) At a velocity of 73.28 ft/second it will hit the ground.
What is velocity?
We are given that a balloon, rising vertically with a velocity of 16 feet per second, releases a sandbag at the instant when the balloon is 80 feet above the ground.
Assume the acceleration of the object is a(t) = −32 feet per second.
(a) For finding the time it will take the bag to strike the ground after its release, we will use the following formula;
[tex]s=u t+\frac{1}{2} a t^2[/tex]
Here, s= distance of the balloon above the ground =-80 feet
[tex]$\mathrm{u}=$[/tex] intital velocity =16 feet per second
[tex]$\mathrm{a}=$[/tex]acceleration of the object =-32 feet per second
[tex]$\mathrm{t}=$[/tex] required time
So, [tex]$s=u t+\frac{1}{2} a t^2$[/tex]
[tex]$$\begin{aligned}& -80=(16 \times t)+\left(\frac{1}{2} \times-32 \times t^2\right) \\& -80=16 t-16 t^2 \\& 16 t^2-16 t-80=0 \\& t^2-t-5=0\end{aligned}$$[/tex]
Now, we will use the quadratic D formula for finding the value of t, i.e;
[tex]t=\frac{-b \pm \sqrt{D}}{2 a}[/tex]
Here, a=1, b=-1, and c=-5
Also, [tex]$\mathrm{D}=b^2-4 a c=(-1)^2-(4 \times 1 \times-5)=21$[/tex]
So, [tex]$t=\frac{-(-1) \pm \sqrt{21}}{2(1)}$[/tex]
[tex]t=\frac{1 \pm \sqrt{21}}{2}[/tex]
We will neglect the negative value of t as time can't be negative, so;
[tex]t=\frac{1+\sqrt{21}}{2}=2.79 \approx 3 \text { seconds. }[/tex]
Hence, after 3 seconds of its release, the bag will strike the ground.
(b) For finding the velocity at which it hit the ground, we will use the formula;
v=u+a t
Here, v= final velocity
So,[tex]$v=16+(-32 \times 2.79)$[/tex]
v=16-89.28=-73.28 feet per second.
Hence, the bag will hit the ground at a velocity of [tex]$-73.28 \mathrm{ft} / \mathrm{second}$[/tex].
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Parts of a Right Triangle
In a right triangle, the sides that meet to form the
right angle are called the legs. The side opposite the
right angle is called the hypotenuse. The hypotenuse is
always the longest of the three sides. It is important
that you can correctly identify the sides of a right tri-
angle, regardless of what position the triangle is in.
leg
leg
60
1. Name the legs.
Practice
AABC is a right triangle.
TRIANGLES AND THE PYTH
hypotenuse
leg
leg
hypotenuse
hypotenuse
2. Name the hypotenuse.
leg
leg
APQR is a right triangle.
3. Name the legs.
4. Name the hypotenuse.
AHLM is a right triangle.
5. Name the legs.
6. Name the hypotenuse.
Review of Squares
and Square Roots
Before you study the Pythagorean theorem, le
first review squares and square roots. Just like add
tion and subtraction are inverses, so are squares
and square roots. In other words, they "undo" e
other. To square a number, you multiply it by itsel
For example, 52 means two factors of 5, or 5 times
5, which is 25. Written algebraically, it looks
this: 52= 5 x 5 = 25. A common mistake is to s
that you multiply by 2, since 2 is the exponent (the
small raised number). But the exponent tells you
how many times to multiply the base (bot
number) by itself.
Twenty-five is a perfect square. It can be writer
as the product of two equal factors. It would be he
1) The legs of △ABC are AB and BC.
2) The name of hypotenuse is AC.
3) The legs of △PQR are PR and RQ.
4) The name of hypotenuse is PQ.
5) The legs of △HLM are LH and ML.
6) The name of hypotenuse is MH.
What is a triangle?
A polygon with three edges and three vertices is called a triangle. It is one of the fundamental geometric shapes. Triangle ABC is the designation for a triangle with vertices A, B, and C. In Euclidean geometry, any three points that are not collinear produce a distinct triangle and a distinct plane.
The right angle of △ABC is ∠ABC. Thus AB and BC meet at right angle. Therefore AB and BC are legs of △ABC.
The opposite side of ∠ABC is AC. Therefore the hypotenuse is AC.
The right angle of △PQR is ∠PRQ. Thus PR and RQ meet at right angle. Therefore PR and RQ are legs of △PQR.
The opposite side of ∠PRQ is PQ. Therefore the hypotenuse is PQ.
The right angle of △HLM is ∠HLM. Thus HL and LM meet at right angle. Therefore HL and LM are legs of △HLM.
The opposite side of ∠HLM is MH. Therefore the hypotenuse is MH.
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What is the slope of the line passing through the points (-3, 4) and (2, - 1)?
Answer:
The slope is -1
Step-by-step explanation:
To find the slope using two points, you must do this:
(y2-y1) divided by (x2-x1) which is -1-4 divided by 2+3 and the answer will be -5/5 or just simply -1
5(g + 8) - 7 = 117 - g = 14
14 is the answer
2 1/3 + 5 1/4
Addition of the fraction above
jon making a dog house to put in his backyard he uses more than 24 feet of wood for the project
Answer:
thanks.
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
In the figure below L || M. find X
Answer:
x = 79
Step-by-step explanation:
To find the value of x we first need to find the missing angle of the triangle in the image.
The sum of interior angles in a triangle is equal to 180°.101 + 29 + missing angle = 180
Add like terms130 + missing side = 180
subtract 130 from both sidesmissing side = 50
Now, the sum of two interior angles in a triangle is equal to an exterior angle that is supplementary to the third interior angle.
So the value of x:
29 + 50 = 79
How much money would i make a year if i work from6am to 2pm, from Saturday and sundays. And i get paid 13 an hour?
Which of the following algebraic steps will solve the equation -6t = 2/3 and what is the solution?
Answer:
C. DIvide both sides by -6 to get 1/9.
Step-by-step explanation:
I need helpppp please
to get the slope of any straight line, we simply need two points off of it, let's use those in the picture below.
[tex]\stackrel{\textit{\LARGE line of reflection}}{(\stackrel{x_1}{-1}~,~\stackrel{y_1}{-4})\qquad (\stackrel{x_2}{1}~,~\stackrel{y_2}{-2})} \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{-2}-\stackrel{y1}{(-4)}}}{\underset{run} {\underset{x_2}{1}-\underset{x_1}{(-1)}}} \implies \cfrac{-2 +4}{1 +1} \implies \cfrac{ 2 }{ 2 } \implies \text{\LARGE 1}[/tex]
now, keeping in mind that perpendicular lines have negative reciprocal slopes, there are three dotted lines, each one of them, hits the line of reflection perpendicularly, so their slope must be
[tex]\stackrel{~\hspace{5em}\textit{perpendicular lines have \underline{negative reciprocal} slopes}~\hspace{5em}} {\stackrel{slope}{1\implies \cfrac{\boxed{1}}{1}} ~\hfill \stackrel{reciprocal}{\cfrac{1}{\boxed{1}}} ~\hfill \stackrel{negative~reciprocal}{-\cfrac{1}{\boxed{1}}\implies \text{\LARGE -1}}}[/tex]
solve for n n/12=300 n=__
A circle has a circumference of 20 m.
Work out the radius of the circle.
Give your answer correct to 1 decimal place.
The required radius of the circle is given as 3.18 m.
Given that,
A circle has a circumference of 20 m. the radius of the circle is to be determined.
Perimeter is the measure of the figure on its circumference.
Here,
The perimeter of the circle = 20m
2πr = 20
r = 20/2π
r = 3.18 m
Thus, the required radius of the circle is given as 3.18 m.
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true or false? in O radius OP intersects chord AC in point B so that AB = 8 units and BC = 8 units. This means that OP is perpendicular to AC
The answer is true, if radius OP intersects chord AC in point B and AB=8 units, BC=8 units.
What is meant by radius?The length of the line segments from a circle's center to its perimeter is referred to as the radius of a circle or sphere in more contemporary use. Radius has two possible plurals: the traditional English plural radiuses or radii. R or r is the most common radius abbreviation and mathematical variable name. Consequently, the diameter D is equal to double the radius.
Given,
In circle radius OP intersects chord AC in point B.
And AB=8 units, BC=8 units
So, OP is perpendicular to AC.
Due to the fact that OA and OC have equal sides and a base length of AC, OAC forms a triangle (the radius of the circle)
When you trace AC, you discover that O, a line perpendicular to AC, intersects the circle's center.
So, the answer is true.
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Write a related function for - 6x + x - 16= 3x
Answer:
x = -2
Step-by-step explanation:
hope this will help you
-2x-3y=-9 and-2x-3y=-9 by elimination
The system of equations has infinite solutions, actually, any pair (x, y) is a solution.
How to solve the system by elimination?To solve a system by elimination, we just need to add/subtract the equations in such a way that we can remove one of the variables.
Here the system of equations is:
-2x-3y = -9
-2x-3y = -9
If we subtract the two equations we will get:
(-2x-3y) - (-2x-3y) = -9 - (-9)
0 = 0
This is a trivial equation, that happens because both equations of the system are the same one.
So the system is true for all real values of x and y.
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In choosing what music to play at a charity fund raising event, Cory needs to have an equal number of piano sonatas from Haydn, Mozart, and Schubert. If he is setting up a schedule of the 15 piano sonatas to be played, and he has 52 Haydn, 18 Mozart, and 21 Schubert piano sonatas from which to choose, how many different schedules are possible? Express your answer in scientific notation rounding to the hundredths place.
Answer: Cory can have 6 different schedules
Step-by-step explanation:
Add them all together and divide by fifteen
The formula A=23.1 e^{0.0152t} models the population of a US state, A, in millions, t years after 2000.
a. What was the population of the state in 2000 ?
b. When will the population of the state reach 28.3 million?
a. In 2000 , the population of the state was ? million.
We want to study the population formula of a given US state according to exponential equation.
a) 23.1 millions.
b) in 2013 - 2014
What is exponential equation?
The exponential function may be a function denoted by f(x)=\exp or e^. Unless otherwise fixed, the term usually refers to the positive-valued operate of a true variable
Main body:
The population state is:
A = 23.1*e^(0.0153*t)
In millions.
Where t represents the number of years after 2000.
a) For the population at the year 2000, we need to evaluate the function at t = 0 (2000 is 0 years after 2000).
A(0) = 23.1*e^(0.0153*0) = 23.1
The population at year 2000 was 23.1 millions.
b) Now we want to solve:
A(t) = 28.3 = 23.1*e^(0.0153*t)
28.3/23.1 = e^(0.0153*t)
1.23 = e^(0.0153*t)
Now we can apply the natural logarithm to both sides:
ln(1.23) = ln( e^(0.0153*t) )
ln(1.23) = 0.0153*t
ln(1.23)/0.0153 = t = 13.5
Hence, 13.5 years after 2000 the population will be 28.3 million.
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18.
Which of the following statements is true?
A. Angles are supplementary if and only
if they form a linear pair.
B. It is Valentine's Day if and only if it is
February.
C. A number is even if and only if it is
divisible by 2.
D. Lines are skew if and only if they are
non-coplanar.
Answer: The correct answer is D, Lines are skew if and only if they are non-coplanar.
In geometry, lines are said to be skew if they are non-coplanar, meaning they do not lie in the same plane. They also do not intersect.
Option A is incorrect because angles can be supplementary (add up to 180 degrees) even if they do not form a linear pair (meaning they do not share a common vertex and a common side).
Option B is incorrect because Valentine's Day does not always fall in February. It is February 14th, but it could fall on a different month in a different year.
Option C is correct because a number is even if and only if it is divisible by 2. An even number can be divided evenly by 2, while an odd number cannot.
Find the equation of the line with slope 0 and passing through (-5,16). Write the equation in standard form.
Lines with a slope of zero can be thought of as y = 0x + b, which simplifies to just "y = b".
In this case, your equation is y = 16.
If you want to force it explicitly into standard form, you could write it at
0x + 1y = 16
Solve for x to the nearest tenth.
Answer:
Answer:
x=9.8
Step-by-step explanation:
Convert the following equation from standard form to slope-intercept form: -9x +3y = -12
Answer:
y=3x-4
Step-by-step explanation:
-9x+3y=-12
3y=12-9x
y=3x-4
Given ΔPHS ≅ ΔCNF, find the values of x, y, and z.
In the given congruent triangle ΔPHS ≅ ΔCNF, the values of x, y, and z are 24° , 37/3° , 61/4° respectively
What is a congruent triangle ?
The meaning of congruent in Maths is addressed to those figures and shapes that can be repositioned or flipped to coincide with the other shapes. These shapes can be reflected to coincide with similar shapes.
Two shapes are congruent if they have the same shape and size. We can also say if two shapes are congruent, then the mirror image of one shape is the same as the other.
Two triangles are said to be congruent if their sides have the same length and angles have same measure. Thus, two triangles can be superimposed side to side and angle to angle.
In mathematics, the term "congruent" refers to figures and forms that may be flipped or rearranged to match up with other ones. These forms can be mirrored to produce related shapes. If two forms are similar in size and shape, they are congruent. We may also state that if two forms are congruent, then their mirror images are identical .Triangles that line up. A triangle is a closed polygon with three line segments that intersect at each of its three angles.
When the sides and angles of two triangles match, the triangles are said to be congruent. Thus, two triangles may be placed side by side and angle by angle on top of one another.
Since both the triangles are congruent this means the side , angles of both the triangles are equal
therefore,
∠ H = ∠ N
∠ S = ∠ C
∠ P = ∠ F
which means,
6x-29° = 115°
6x=144°
x=24°
∠ S = 180° - ∠ H - 36°
∠ S = 180°-6x+29°-36°
∠ S = 173°-6x
173°-6x=4z-32°
173°-144°+32° = 4z
61/4° = z
3y-1° = 36°
y= 37/3°
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The diagram shows a frustum which is constructed from a pyramid.
(a) The surface area of the frustum.
(b) Find the volume of the frustum.
(c) Find the surface area of the original pyramid.
The surface area of the frustum is 1744 square units
The volume of the pyramid is 2031.33 cube units.
What is a frustum of a pyramid?
By cutting the top of a typical pyramid, the frustum is created, which is a pyramid. Because of this, it is known as a truncated pyramid. The frustum of the pyramid is that portion of a pyramid that is cut through by a plane parallel to its base and lies between the vertex and the base.
a) First, we calculate the height of the frustum.
Let height be H
The base length be L1=24
Base width be W1=12
Top length is L2=14
To width be W2=13
Side height be C=13
Using the formula, H
[tex]H=\sqrt{ C^{2} - \frac{(L1-L2)^{2}}{2}}\\H=\sqrt{ 13^{2} - \frac{(24-14)^{2}}{2}}\\H=\sqrt{ 169 -50}\\H=\sqrt{119} \\H=11[/tex]
Now, the surface area of the frustum is LSA+area of bases of a frustum
Here, P1= perimeter of the base1 of the frustum
P2 is the perimeter of the base 2 of the frustum
[tex]L.S.A=\frac{1}{2} .(P1+P2).L \\=\frac{1}{2} .(72+42).24 \\=\frac{1}{2} .(114).24 \\=1368[/tex]
Now, S1 =area of base1 of frustum =288
S2= area of base 2 of frustum=98
TSA is given by LSA+area of bases of a frustum
=1368+288+98
=1724.
Therefore the surface area is 1724 square units.
b) Volume is given by
[tex]V=\frac{1}{3}.H.(S1+S2+\sqrt{S1S2} )\\ V=\frac{1}{3} . 11.(386+168)\\V=2031.33[/tex]
Therefore the volume is 2031.33 cube units.
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Which of the following choices is the area of the rectangle if the length is 8x and the width is 3y-2?
11xy-6x
24xy-16
24xy-16x
None of these choices are correct.
Answer:
Here,
the length=8x
the width =3y-2
We know that,
Area of rectangle=l×b
or, 8x × 3y-2
8x(3y-2)
24xy-16x
Hence, the correct answer is 24xy-16x
Suppose you can afford to pay $ 325 a month for 9 years towards a new car with no down payment. If the current interest rates are 4.75%, how expensive a car can you afford?
Car sticker price =
Using the interest rates formula, we know that an automobile that costs $24588.44 is within our means.
What are interest rates?The amount of interest due each period expressed as a percentage of the amount lent, deposited, or borrowed is known as an interest rate.
The total interest on a loaned or borrowed sum is determined by the principal amount, the interest rate, the frequency of compounding, and the period of time the loan, deposit, or borrowing took place.
So, let's say the car's affordable price is P:
The entire payback is equal to P r/100 T + P.
In this case, P, r = 4.75, and T = 9 years.
$351,00 = P × (4.75/100 × 9 + 1)
$351,00 = P × ( 0.4275 + 1)
$351,00 = P × 1.4275
P = 351,00 / 1.4275
When you use the division operation, we receive:
P = $24588.44
Therefore, using the interest rates formula, we know that an automobile that costs $24588.44 is within our means.
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PLEASE ANSWER CLEARLY WITH EQUATION
Samuel went to the grocery store and purchased cans of soup and frozen dinners. Each can of soup has 300 mg of sodium and each frozen dinner has 450 mg of sodium. Samuel purchased 5 more frozen dinners than cans of soup and they all collectively contain 6000 mg of sodium. Write a system of equations that could be used to determine the number of cans of soup purchased and the number of frozen dinners purchased. Define the variables that you use to write the system.
ax + by = 6000 and a + 5 = b are two equations that might be used to calculate how many soup cans and frozen dinners were purchased.
What is an equation?
There are several methods to define a formula. A mathematical statement that establishes the equivalence of two mathematical expressions is the definition of an equation in algebra.
This is best shown by the formula 3x + 5 = 14. In this instance, the word equal comes between the phrases 3x + 5 and 14. Even the most basic algebraic equations include the usage of mathematical variables.
Let frozen supper be y and soup cans be x.
X now has 300 mg of sodium in it.
x = 300
Y also has 450 mg of sodium in it.
y = 450
Samuel reportedly buys five more frozen dinners than soup cans, and they all have a combined salt content of 6000 mg.
Let the number of frozen dinners be "b," and the number of soup cans be "a."
ax + by = 6000
⇒ a(300) + b(450) = 6000 ...1
Samuel bought 5 more frozen dinners than soup cans, according to the inquiry, which results in equation
a + 5 = b ...2
Now, by changing the value of b in equation 1 we obtain,
⇒ a(300) + (a + 5)(450) = 6000
⇒ 300a + 450a = 6000 - 2250
⇒ 750a = 3750
⇒ a = 3750/750
⇒ a = 5
By changing the value of an in equation 2, we obtain
⇒ 5 + 5 = b
⇒ b = 10
So, ax + by = 6000 and a + 5 = b are two equations that might be used to calculate how many soup cans and frozen dinners were purchased, respectively, where x and y stand for soup cans and frozen dinners, respectively, and a and b stand for the quantity of soup cans and frozen dinners.
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3. Write the recursive formula given the following sequence: 20, 15, 10, 5, ...
The recursive formula for the arithmetic succession will be written as aₙ = 25 - 5n.
What is an arithmetic sequence?A series of integers called an arithmetic succession or arithmetic chain of events has a fixed difference between the terms.
Let a₁ be the first term and d be a common difference.
Then the nth term of the arithmetic sequence is given as,
aₙ = a₁ + (n - 1)d
The sequence is given below.
20, 15, 10, 5, .....
The first term is 20 and the common difference is given as,
d = 15 - 20
d = - 5
Then the recursive formula given the following sequence is given as,
aₙ = a₁ + (n - 1)d
aₙ = 20 + (n - 1) × (-5)
aₙ = 20 - 5n + 5
aₙ = 25 - 5n
The formula for the arithmetic sequence will be written as aₙ = 25 - 5n.
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What is the inequality on this word problem.
Nancy has $240 in the bank. She wants to buy as many $15 video games as possible. How many video games could she buy if she wanted to keep at least $120 in the bank?
Nancy can buy maximum 8 video games.
How to solve inequality?Steps to solve inequality:
Get rid of all fractions by multiplying all terms by the fractions' lowest common denominator. Simplify the inequality by merging like terms on each side.To get the unknown on one side and the numbers on the other, add or subtract the appropriate amounts. multiply each term in the inequality by the unknown coefficient.The inequality will not change if the coefficient is positive.
The inequality will be the other way around if the coefficient is negative.
If Nancy wants to keep at least $120 in her account and at present, she is having $240
So, she can spend = 240-120= $120
And, one video game price= $15
Let us consider she can buy maximum 'X' games
15×X=$120
X = 8 units
Hence, she can buy a maximum of 8 video games.
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Round 54.71 to the nearest tenth
Answer:
the digit 1 is less than 5, so we round 54.71 down to 54.7.
Step-by-step explanation: