Answer: The total cost would be 37.95
Step-by-step explanation:
The total cost for the night, including a 15% tip on a $33 meal, is $37.95.
Explanation:To calculate the total cost for the night, we need to add the meal cost and the tip. For a $33 meal, a 15% tip would be calculated using the formula tip = meal cost x tip percentage/ 100. In this case, tip = $33 x 15/100= $4.95. Therefore, the total cost for the night (meal cost + tip) would be $33 + $4.95 = $37.95.
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How do I go about solving this?
Answer:
Option B is correct.
Step-by-step explanation:
we are given [tex]f(x) = \frac{x}{2}-3[/tex]
and [tex]g(x) = 3x^2+x-6[/tex]
We need to find (f+g)(x)
We just need to add f(x) and g(x)
(f+g)x = f(x) + g(x)
[tex](f+g)(x)=(\frac{x}{2}-3)+(3x^2+x-6)\\(f+g)(x)=\frac{x}{2}-3+3x^2+x-6\\(f+g)(x)=3x^2+\frac{x}{2}+x-3-6\\(f+g)(x)=3x^2+\frac{3x}{2}-9\\[/tex]
So, Option B is correct.
For this case we have the following functions:
[tex]f (x) = \frac {x} {2} -3\\g (x) = 3x ^ 2 + x-6[/tex]
We must find [tex](f + g) (x).[/tex] By definition, we have to:
[tex](f + g) (x) = f (x) + g (x)[/tex]
So:
[tex](f + g) (x) = \frac {x} {2} -3+ (3x ^ 2 + x-6)\\(f + g) (x) = \frac {x} {2} -3 + 3x ^ 2 + x-6\\(f + g) (x) = + 3x ^ 2 + x + \frac {x} {2} -3-6\\(f + g) (x) = + 3x ^ 2 + \frac {2x + x} {2} -9\\(f + g) (x) = + 3x ^ 2 + \frac {3x} {2} -9[/tex]
Answer:
Option B
PLEASE HELP!!!
Eliminate the parameter. x = 5 cos t, y = 5 sin t. Answer must be a rectangular equation
Answer:
[tex]x^2+y^2=25[/tex]
Step-by-step explanation:
Recall the following Pythagorean Identity:
[tex]\sin^2(\theta)+\cos^2(\theta)=1[/tex]
Let's solve the x equation for cos(t) and the y equation for sin(t).
After the solve we will plug into our above identity.
x=5cos(t)
Divide both sides by 5:
(x/5)=cos(t)
y=5sin(t)
Divide both sides by 5:
(y/5)=sin(t)
Now we are ready to plug into the identity:
[tex]\sin^2(t)+\cos^2(t)=1[/tex]
[tex](\frac{y}{5})^2+(\frac{x}{5})^2=1[/tex]
[tex]\frac{x^2}{5^2}+\frac{y^2}{5^2}=1[/tex]
Multiply both sides by 5^2:
[tex]x^2+y^2=5^2[/tex]
This is a circle with center (0,0) and radius 5.
All I did to get that was compare our rectangular equation we found to
[tex](x-h)^2+(y-k)^2=r^2[/tex]
where (h,k) is the center and r is the radius of a circle.
The graph of F(x), shown below, resembles the graph of G(x)=x^2, but it has been changed somewhat.which of the following could be the equation of F(x)?
Answer:
Choice A. [tex]F(x) = -(x - 4)^{2} -3[/tex].
Step-by-step explanation:
Both F(x) and G(x) are quadratic equations. The graphs of the two functions are known as parabolas. All four choices for the equation of F(x) are written in their vertex form. That is:
[tex]y = a(x - h)^{2} + k[/tex], [tex]a \ne 0[/tex]
where
The point [tex](h, k)[/tex] is the vertex of the parabola, andThe value of [tex]a[/tex] determines the width and the direction of the opening of the parabola. [tex]a >0[/tex] means that the parabola opens upward. [tex]a <0[/tex] means that the parabola opens downwards. The opening becomes narrower if the value of [tex]a[/tex] increases.For the parabola G(x),
the vertex is at the point [tex](4, -3)[/tex], andthe parabola opens downwards.In other words,
[tex]h = 4[/tex],[tex]k = -3[/tex], and[tex]a \le 0[/tex].Hence choice A. [tex]F(x) = -(x - 4)^{2} -3[/tex].
The only equation that correctly represents the graph of F(x) as a vertically stretched and reflected version of the graph of G(x), shifted to the right by 4 units.
Option A. [tex]F(x)=-(x-4)^{2}-3[/tex] is correct.
To answer this question, we can consider the following transformations of the graph of [tex]G(x)=x^2$:[/tex]
Vertical stretch: [tex]$F(x)=kx^2$[/tex] for some positive constant k.
This will stretch the graph of G(x) vertically by a factor of k.
Vertical shift: [tex]$F(x)=x^2+h$[/tex] for some constant $h$.
This will shift the graph of G(x) up or down by $h$ units.
* **Horizontal shift: [tex]F(x)=(x+h)^2[/tex] for some constant $h$. This will shift the graph of G(x) to the left or right by h units.
* **Reflection: [tex]F(x)=-x^2[/tex]. This will reflect the graph of G(x) across the x-axis.
The graph of F(x) in the image appears to be a vertically stretched and reflected version of the graph of G(x), shifted to the right by 4 units. This suggests that the equation of F(x) could be of the form:
F(x)=-k(x-h)^2 for some positive constant k and some constant h.
To find the values of k and h, we can use the fact that the graph of F(x) passes through the points (-2,3) and (4,-3).
Substituting x=-2 and y=3 into the equation above, we get:
[tex]3=-k(-2-h)^2[/tex]
and substituting x=4 and y=-3 into the equation above, we get:
[tex]-3=-k(4-h)^2[/tex]
Dividing the second equation by the first equation, we get:
[tex]\frac{1}{3}=\frac{(-2-h)^2}{(4-h)^2}[/tex]
Taking the square root of both sides, we get:
[tex]\pm \frac{1}{\sqrt{3}}=\frac{-2-h}{4-h}[/tex]
Solving for $h$, we get:
[tex]h=4\pm \frac{4}{\sqrt{3}}[/tex]
Substituting this value of h into either of the original equations, we can solve for k.
For example, substituting [tex]$h=4+\frac{4}{\sqrt{3}}$[/tex] into the first equation, we get:
[tex]3=-k\left(-2-4+\frac{4}{\sqrt{3}}\right)^2[/tex]
Solving for $k$, we get:
[tex]k=3\cdot \left(-6+\frac{4}{\sqrt{3}}\right)^2[/tex]
Therefore, one possible equation for $F(x)$ is:
[tex]F(x)=-3\left(x-4+\frac{4}{\sqrt{3}}\right)^2[/tex]
Another possible equation for $F(x)$ is:
[tex]F(x)=-3\left(x-4-\frac{4}{\sqrt{3}}\right)^2[/tex]
These two equations are equivalent, since they both represent the same reflected and vertically stretched version of the graph of G(x), shifted to the right by 4 units.
Therefore, the answer to the question is:
[tex]A. F(x)=-(x-4)^{2}-3[/tex]
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Please help I need it so bad
Answer:
y ≤ 3x - 2 and 4x + y ≥2
Step-by-step explanation:
We can easily solve this problem by using a plotting tool or any graphing calculator.
We test each case, until we arrive to the correct option
Case 1
y ≤ 3x - 2 and 4x + y ≥2
Correct Option.
Please see attached image for graph
This net can be folded to form a cube with a side length of 20 units.
Answer:
Step-by-step explanation:
A cube has 6 faces and faces are square in shape. Thus to find the surface area of a cube, first we will find the area of one face. To find the area of a face we will simply multiply the side length twice.
20*20=400
Thus the area of one face = 400 units square.
Now to find the surface area of a cube we will simply multiply the area of one face by the number of total faces of a cube.
400*6 = 2400
Therefore the net folded to form a cube has a surface area of 2400 units square....
Solve for variable: 5z/8 – 1/3 = 2/5
Answer: z= .6
Step-by-step explanation:
Numerator: When you do 5•.6, you get 3, and then 3-1 equals 2.
Denominator: 8 - 3 = 5.
Therefore you get 2/5 which makes z = .6
if m + 1 is an an even integer which one of the following must be an odd integer ?
A : m - 1
B : 2m - 2
C : 2m + 1
D : 2m + 2
To find which expression must be an odd integer when m + 1 is even, we analyze each option using substitution. The only option that results in an odd integer is 2m + 1.
If m + 1 is an even integer, then m must be an odd integer. Let's analyze each option to see which one of them must be an odd integer:
(A) m - 1: Since m is odd, subtracting 1 from an odd number will result in an even number. Therefore, (A) m - 1 is not an odd integer.(B) 2m - 2: If we substitute an odd integer for m, we get (2 * odd) - 2, which simplifies to an even number. Thus, (B) 2m - 2 is not an odd integer.(C) 2m + 1: Substituting an odd integer for m gives (2 * odd) + 1, which simplifies to an odd number. Therefore, (C) 2m + 1 is an odd integer.(D) 2m + 2: If we substitute an odd integer for m, we have (2 * odd) + 2, which simplifies to an even number. Hence, (D) 2m + 2 is not an odd integer.Therefore, the answer is (C) 2m + 1 as it is the only option that must be an odd integer.
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Final answer:
Option C, which is 2m + 1, must be an odd integer if m + 1 is an even integer because adding 1 to any even integer results in an odd integer.
Explanation:
Given that m + 1 is an even integer, we can determine which of the other expressions would therefore be an odd integer. We know that any even integer can be written in the form 2k, where k is an integer, because even integers are multiples of 2. Similarly, odd integers can be written as 2k + 1, where k is also an integer.
Given the options:
A: m - 1, if m + 1 is even, then m is odd, and subtracting 1 from an odd number results in an even number, so this option is not correct.B: 2m - 2, this is clearly even because it is a multiple of 2 regardless of the value of m, so this option is not correct.C: 2m + 1, if m is odd (since m + 1 is even), this will result in an odd number, so this option is correct.D: 2m + 2, like option B, this is also clearly even, so this option is not correct.Therefore, the answer is C: 2m + 1.
Price of a jeep dropped from 27000 to 22900. What was the percent decrease in price nearest hundredth percent?
Answer:
(27,000 - 22,900)/27,000 = 0.1519 or 15.19% decrease in price.
Step-by-step explanation:
For this case, we propose a rule for three:
27,000 -----------> 100%
22,900 -----------> x
Where "x" represents the percentage associated with 22,900.
[tex]x = \frac {22,900 * 100} {27,000}\\x = 84.8148148148[/tex]
Now we look for the percentage of decrease:
100% -84.8148148148% = 15.1851851852%
Rounding off we have:
15.19%
Answer:
15.19%
Given the expression, , choose the correct horizontal asymptote. y=x^2-8x+3/x^2+3x+1 None y = 0 y = 1 y = -2
Answer:
y = 1
Step-by-step explanation:
Given function is:
[tex]\frac{x^2+8x+3}{x^2+3x+1}[/tex]
In order to find the horizontal asymptote, the coefficients of highest degree variable of numerator and denominator are divided.
In our case,
both the numerator and denominator have 1 as he co-efficient of x^2
So the horizontal asymptote is y = 1/1
Hence, third option y=1 s correct ..
Final answer:
The correct horizontal asymptote for the given rational expression is y = 1, found by comparing the degrees and leading coefficients of the numerator and denominator.
Explanation:
For the expression y = (x² - 8x + 3) / (x² + 3x + 1), the correct horizontal asymptote is determined by looking at the degrees of the polynomials in the numerator and the denominator. When the degrees are the same, the horizontal asymptote is found by dividing the leading coefficients. In this case, both polynomials are of degree 2, and the leading coefficients are both 1. Thus, the horizontal asymptote is y = 1.
Find the area.
A. 19 ft²
B. 30 ft²
C. 31 ft²
D. 84 ft²
Answer: D. 84 ft^2
Step-by-step explanation: The area of a trapezoid is (a+b)/2 x h. A and B are the bases, and h is the height. Plug in the numbers.
(8+16)/2 x 7 = 84
Your answer would be 84 ft^2. D.
Find the value of X in the picture please
Answer:
The measure of arc x is 70°
Step-by-step explanation:
we know that
The measurement of the outer angle is the semi-difference of the arcs it encompasses.
and
The inscribed angle is half that of the arc it comprises.
so
The arc that comprises the inscribed angle of 15 degrees is equal to
15(2)=30 degrees
The outer angle of 20 degrees is equal to
20°=(1/2)[x-30°]
40°=[x-30°]
x=40°+30°=70°
A right cylinder has a radius of 5 m and a height of 3 m. What is the volume of the cylinder?
Answer:
V = 75 pi m^3
or approximately
V =235.5 m^3
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2 h
where r is the radius and h is the height
V = pi * 5^2 *3
V = 75 pi m^3
If we use 3.14 as an approximation for pi
V =235.5 m^3
Answer:
volume = 75(pi) m^3 (exactly)
volume = 235.6 m^3 (approximately)
Step-by-step explanation:
volume of cylinder = pi * radius^2 * height
volume = pi * (5 m)^2 * 3 m
volume = 75(pi) m^3 (exactly)
volume = 235.6 m^3 (approximately)
Use a calculator to evaluate 9 and the square root of three to the nearest ten thousandth. a. 27.1234 c. 44.9569 b. 6.7050 d. 5.1962 Please select the best answer from the choices provided
Answer:
Option D 5.1962
Step-by-step explanation:
we have
The number [tex]9[/tex] and the number [tex]\sqrt{3}[/tex]
I assume for the choices provided that the operation is calculate [tex]9[/tex] divided by [tex]\sqrt{3}[/tex]
so
[tex]\frac{9}{\sqrt{3}} =5.1962[/tex] (rounded to the nearest ten thousandth)
Answer:
C. 44.9569
Step-by-step explanation:
Angle θ is in standard position. If (8, -15) is on the terminal ray of angle θ, find the values of the trigonometric functions.
Answer:
* sin Ф = -15/17 * cos Ф = 8/17 * tan Ф = -15/8
* csc Ф = -17/15 * sec Ф = 17/8 * cot Ф = -8/15
Step-by-step explanation:
Lets revise the trigonometric function of angle Ф
- Angle θ is in standard position
- Point (8, -15) is on the terminal ray of angle θ
- That means the terminal is the hypotenuse of a right triangle x and y
are its legs
∵ x-coordinate is positive and y-coordinate is negative
∴ angle Ф lies in the 4th quadrant
- The opposite side of angle Ф is the y-coordinate of the point on the
terminal ray of angle Ф and the adjacent side to angle Ф is the
x-coordinate of that point
∵ The length of the hypotenuse (h) = √(x² + y²)
∴ h = √[(8)² + (-15)²] = √[64 + 225] = √[289] = 17
∴ The length of the hypotenuse is 17
- Lets find sin Ф
∵ sin Ф = opposite/hypotenuse
∵ The opposite is y = -15
∵ The hypotenuse = 17
∴ sin Ф = -15/17
- Lets find cos Ф
∵ cos Ф = adjacent/hypotenuse
∵ The adjacent is x = 8
∵ The hypotenuse = 17
∴ cos Ф = 8/17
- Lets find tan Ф
∵ tan Ф = opposite/adjacent
∵ The opposite is y = -15
∵ The adjacent = 8
∴ tan Ф = -15/8
- Remember csc Ф is the reciprocal of sin Ф
∵ csc Ф = 1/sin Ф
∵ sin Ф = -15/17
∴ csc Ф = -17/15
- Remember sec Ф is the reciprocal of cos Ф
∵ sec Ф = 1/ cos Ф
∵ cos Ф = 8/17
∴ sec Ф = 17/8
- Remember cot Ф is the reciprocal of tan Ф
∵ cot Ф = 1/tan Ф
∵ tan Ф = -15/8
∴ cot Ф = -8/15
Ryan is looking for the sum of the cube of a number, n, and 16.
What is the sum Ryan is looking for if n = 2?
Answer:
24
Step-by-step explanation:
Changing the word problem into an equation you get that you are trying to find n^3+16. This is because they are looking for the cube of a number n plus 16. Plugging in n as 2 you get 2^3+16 which is 8+16 which is 24.
Answer:
24
Step-by-step explanation:
Which of the following best describes a parabola?
O
A. The set of all points in a plane that are equidistant from a single
point and a single line
O
B. The set of all points in a plane that are equidistant from two points
O
C. The set of all points in a plane at a given distance from a given
point
O
D. The set of all points in a plane that are equidistant from two points
and a single line
Answer:
A
Step-by-step explanation:
The definition of a parabola.
Any point on the parabola (x, y) is equidistant from a point ( the focus ) and a line ( the directrix ).
Parabola is best describe by:
The set of all points in a plane that are equidistant from a single point and a single line What is parabola?"Parabola is defined as the set of all the points in a plane that are equidistant from a fixed point known as focus and a fixed line called directrix."
According to the question,
A. The set of all points in a plane that are equidistant from a single
point and a single line.
Equidistant from a single point called focus.Equidistant from a single line known as directrix.It represents the parabola.
Option(A) is the correct answer.
B. The set of all points in a plane that are equidistant from two points.
It represents the line.
Option (B) is not the correct answer.
C. The set of all points in a plane at a given distance from a given
point.
Given point is center of the circle.It represents the circle.
Option (C) is not the correct answer.
D. The set of all points in a plane that are equidistant from two points
and a single line.
It represents the perpendicular bisector.
Option (D) is not the correct answer.
Hence, Option(A) is the correct answer.
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find the domain for the function f(x)=sqrt x^2-x+6
Answer:
The domain is {x : x ∈ R} or (-∞ , ∞)
Step-by-step explanation:
* Lets explain how to find the domain
- The domain of the function is the values of x which make the
function defined
- The quantity under the square root must be ≥ 0 because there is
no square root for negative value
* Lets solve the problem
∵ f(x) = √(x² - x + 6)
∴ The value of (x² - x + 6) must be greater than or equal zero because
there is no square root for negative value
- Graph the function to know which values of x make the quantity
under the root is negative that means the values of x which make
the graph under the x-axis
∵ The graph doesn't intersect the x-axis at any point
∵ All the graph is above the x-axis
∴ There is no value of x make f(x) < 0
∴ x can be any real number
∴ The domain of f(x) is all real numbers
∴ The domain is {x : x ∈ R} or (-∞ , ∞)
Find the value of x
Answer:
x = 40
Step-by-step explanation:
The three angles in a triangle add to 180 degrees
x + 30 + (3x-10) = 180
Combine like terms
4x +20 = 180
Subtract 20 from each side
4x+20-20 = 180-20
4x= 160
Divide each side by 4
4x/4 =160/4
x = 40
Which expression is equivalent to (a^-8b/a^-5b^3)^-3
Answer:
The correct option is A.
Step-by-step explanation:
The given expression is:
(a^-8b/a^-5b^3)^-3
We have to keep one thing in our mind that in a division, same base, the exponents are subtracted.
We will change the division into multiplication: The denominator will become numerator and the signs of the exponent become opposite.
(a^-8 *a^+5 * b *b^-3)^-3
=(a^-8+5 * b^1-3) ^-3
=(a^-3*b^-2)^-3
=(a)^-3*-3 (b)^-2*-3
= a^9 b^6
Thus the correct option is A....
Answer:
a^9b^6
Step-by-step explanation:
PLEASE URGENT
Carrie is finding the set of even numbers within the set of prime numbers.
Of the sets described, which is the universal set?
all real numbers
all integers
prime numbers
even numbers
Answer:
Prime Numbers
Step-by-step explanation:
Two sets are being considered in the given statement:
Set of even numbersSet of prime numbersA universal set is defined as such a set from which all the other subsets are taken for a given case. Or in other words, a universal set is such a set to which all the subsets belong and this universal set contains all the elements being studied/considered.
For the given case, set of Even Numbers is the subset which is being taken from the set of prime numbers. The set of prime numbers contains all the elements which we are considering for this very scenario.
Therefore, the set of prime numbers is the universal set.
Answer:
c
Step-by-step explanation:
What is the yintercept of the line given by the equation below?
y= 8x+7
Answer:
7
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 )
y = 8x + 7 ← is in slope- intercept form
with y- intercept c = 7
To prove that the triangles are similar by the SAS similarity theorem, it needs to be proven that
J measures 60°.
J measures 30°.
I measures 60°.
I measures 30°.
Answer:
I measures 60° ⇒ 3rd answer
Step-by-step explanation:
* Look to the attached figure
- To prove that the two triangles are similar by SAS we must to
find two proportional pairs of corresponding side and the measure
of the including angles between them are equal
- The given is:
m∠ F = 60°
EF = 40 , FG = 20
HI = 20 , IJ = 10
- To prove that the Δ EFG is similar to Δ HIJ we must to prove
# EF/ HI = FG/IJ ⇒ two pairs of sides proportion
# m∠ F = m∠ I ⇒ including angles equal
∵ EF = 40 and HI = 20
∴ EF/HI = 40/20 = 2
∵ FG = 20 and IJ = 10
∴ FG/IJ = 20/10 = 2
∵ EF/HI = FG/IJ = 2
∴ The two pairs of sides are proportion
∵ ∠ F is the including angle between EF and FG
∵ ∠ I is the including angle between HI and IJ
∴ m∠ F must equal m∠ I
∵ m∠ F = 60° ⇒ given
∴ m∠ I = 60°
* I measures 60°
To prove triangles are similar by the SAS similarity theorem when dealing with equilateral triangles, the angle between the proportional sides needs to be congruent. In this context, showing that the angle measures 30° would be necessary if one angle is already known to be 60°. Thus, either angle I or J should be proven to measure 30°, depending on which is between the proportional sides.
Explanation:To prove that triangles are similar by the SAS similarity theorem, two conditions must be met: corresponding sides are in proportion, and the angles between those sides are congruent. In the context of proving triangle similarity with equilateral triangles, by using a bisector, we can form a smaller triangle whose hypotenuse is twice as long as one of its sides. Consequently, as the sides preserve this ratio, the angles approach 30° and 60°. Therefore, if we must prove that a triangle in a given figure is similar through the SAS similarity criterion, and we have a side-angle-side situation where one angle is already known to be 60°, the angle we would need to prove congruent would reasonably be 30°.
This conclusion is supported by the nature of equilateral triangles, where bisecting the angle will give us angles of 30° and 60°. Additionally, the similarity of triangles is further backed by the congruency of angles and the proportionality of sides, as mentioned in other contexts within the provided information. Therefore, based on the given context and the properties of equilateral triangles, we would aim to prove that angle I or angle J (whichever is between the proportional sides) measures 30°.
16. When Laura finishes cooking, her oven
temperature is 400°F. If her oven cools at a rate of
3.25°F per minute, how many minutes will it take
for her oven to reach 75°F? Enter your response in
the gridded area.
DW
Answer:
Her oven will cool to 75°F in 100 minutes, or 1 hour 40 minutes.
Step-by-step explanation:
Let T(t) represent the oven temperature, and t the time in minutes.
Then:
T(t) = 400°F - (3.25°F/min)t
Find the time, t, at which T(t) will = 75°F:
400°F - (3.25°F/min)t = 75°F
Subtracting 75°F from both sides, we get:
(3.25°F/min)t = 325°F.
Dividing both sides by (3.25°F/min) yields:
t = 100 minutes.
Her oven will cool to 75°F in 100 minutes, or 1 hour 40 minutes.
It will take 100 minutes for Laura's oven to cool down from 400°F to 75°F at a cooling rate of 3.25°F per minute.
The temperature must drop from 400°F to 75°F, so the temperature difference: 400°F - 75°F = 325°F.
325°F / 3.25°F per minute = 100 minutes.
If sales tax is 6% and you buy a shirt for $25 how much do you owe?
Answer:
26.50
Step-by-step explanation:
First we need to calculate the sales tax
25 * 6%
Changing to decimal from
25 * .06
1.50
Then we add the tax to the cost of the shirt
25+1.50
26.50
We owe 26.50
The graph below shows the function f(x)=x-3/x^2-2x-3 which statement is true
Answer:
The correct option is A.
Step-by-step explanation:
Domain:
The expression in the denominator is x^2-2x-3
x² - 2x-3 ≠0
-3 = +1 -4
(x²-2x+1)-4 ≠0
(x²-2x+1)=(x-1)²
(x-1)² - (2)² ≠0
∴a²-b² =(a-b)(a+b)
(x-1-2)(x-1+2) ≠0
(x-3)(x+1) ≠0
x≠3 for all x≠ -1
So there is a hole at x=3 and an asymptote at x= -1, so Option B is wrong
Asymptote:
x-3/x^2-2x-3
We know that denominator is equal to (x-3)(x+1)
x-3/(x-3)(x+1)
x-3 will be cancelled out by x-3
1/x+1
We have asymptote at x=-1 and hole at x=3, therefore the correct option is A....
Answer:
Its A. I just passed the final exam with 5 minutes left of the SESSION.
Step-by-step explanation:
Is f(x)=([tex]\frac{1}{e}[/tex])^x a exponential function?
Answer:
Yes.
Step-by-step explanation:
It can be noticed that 1/e can be written as e^(-1). Whenever a number or a variable is shifted from the numerator to the denominator or vice versa, the power of that number or that variable becomes negative. This means that 1/e = e^(-1). Since f(x) = (1/e)^x, f(x) can be written as:
f(x) = (e^(-1))^x.
Since there are two powers and the base is same, so both the powers will be multiplied. Therefore:
f(x) = e^(-x).
It can be seen that e is involved in the function and it has a negative power of x, so this means that f(x) is a decreasing exponential function!!!
F(t)=-2t+5 f()=13
Please help
Answer:
-4
Step-by-step explanation:
So we are given f(t)=-2t+5.
We are asked to find the value a such that f(a)=13.
If f(t)=-2t+5, then f(a)=-2a+5. I just replaced old input,x, with new input, a.
So we want to solve f(a)=13 for a.
f(a)=13
Replace f(a) with -2a+5:
-2a+5=13
Subtract 5 on both sides:
-2a =8
Divide both sides by -2:
a =-4
Check:
Is -2t+5=13 for t=-4?
-2(-4)+5=8+5=13, so yep.
The value of t is -4 for which the function will give 13 as output.
What is a function?A mathematical relationship from a set of inputs to a set of outputs is called a function.
How to find the value of t so that the function gives 13 as output?The given function is F(t) = -2t+5
To get the value of t we should equate the function with 13.So, -2t + 5 = 13
⇒ -2t = 8
⇒ t = -4
So, for the value of t = -4 the given function will give the output 13
Find more about "Functions" here: brainly.com/question/4025726
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What is the amplitude, period, and phase shift of f(x) = −3 sin(4x − π) − 5?
Amplitude = −3; period = 2π; phase shift: x equals pi over four
Amplitude = 3; period = pi over two; phase shift: x equals pi over four
Amplitude = −3; period = 2π; phase shift: x equals negative pi over four
Amplitude = 3; period = pi over two; phase shift: x equals negative pi over four
Answer:
2nd choice.
Step-by-step explanation:
Let's compare the following:
[tex]f(x)=a\sin(b(x-c))+d[/tex] to
[tex]f(x)=-3\sin(4x-\pi))-5[/tex].
They are almost in the same form.
The amplitude is |a|, so it isn't going to be negative.
The period is [tex]\frac{2\pi}{|b|}[/tex].
The phase shift is [tex]c[/tex].
If c is positive it has been shifted right c units.
If c is negative it has been shifted left c units.
d is the vertical shift.
If d is negative, it has been moved down d units.
If d is positive, it has been moved up d units.
So we already know two things:
The amplitude is |a|=|-3|=3.
The vertical shift is d=-5 which means it was moved down 5 units from the parent function.
Now let's find the others.
I'm going to factor out 4 from [tex]4x-\pi[/tex].
Like this:
[tex]4(x-\frac{\pi}{4})[/tex]
Now if you compare this to [tex]b(x-c)[/tex]
then b=4 so the period is [tex]\frac{2\pi}{4}=\frac{\pi}{2}[/tex].
Also in place of c you see [tex]\frac{\pi}{4}[/tex] which means the phase shift is [tex]\frac{\pi}{4}[/tex].
The second choice is what we are looking for.
Answer: Second Option
Amplitude = 3; period = pi over two; phase shift: x equals pi over four
Step-by-step explanation:
By definition the sinusoidal function has the following form:
[tex]f(x) = asin(bx - c) +k[/tex]
Where
[tex]| a |[/tex] is the Amplitude of the function
[tex]\frac{2\pi}{b}[/tex] is the period of the function
[tex]-\frac{c}{b}[/tex] is the phase shift
In this case the function is:
[tex]f(x) = -3 sin(4x - \pi) - 5[/tex]
Therefore
[tex]Amplitude=|a|=3[/tex]
[tex]Period =\frac{2\pi}{b} = \frac{2\pi}{4}=\frac{\pi}{2}[/tex]
[tex]phase\ shift = -\frac{(-\pi)}{4}=\frac{\pi}{4}[/tex]
A solid right pyramid has a hexagon all base with an area of 7.4 units the pyramid has a height of 6 units what is the volume of the pyramid
Answer:
14.8 units³
Step-by-step explanation:
The volume of a "pointed" solid, such as a cone or pyramid, is one-third the product of its base area and height:
V = (1/3)Bh
Filling in the given numbers and doing the arithmetic, we find the volume to be ...
V = (1/3)(7.4 units²)(6 units) = 14.8 units³
The volume of the pyramid is 14.8 cubic units.
What is the surface area of the right prism below?
Answer:
C. [tex]432\text{ units}^2[/tex]
Step-by-step explanation:
We have been given an image of a right prism. We are asked to find the surface area of our given prism.
The surface area of our given prism will be sum of area of two base right triangles and area of three rectangles.
[tex]SA=2B+Ph[/tex], where,
SA = Surface area,
B = Area of each base,
P = Perimeter of base,
h = Height of prism.
Let us find area of right base of prism.
[tex]B=\frac{1}{2}\times 6\times 8[/tex]
[tex]B=3\times 8[/tex]
[tex]B=24[/tex]
Perimeter of base will be [tex]6+8+10=24[/tex].
Upon substituting these values in surface area formula, we will get:
[tex]SA=2*24+24*16[/tex]
[tex]SA=24(2+16)[/tex]
[tex]SA=24(18)[/tex]
[tex]SA=432[/tex]
Therefore, the surface area of our given prism is 432 square units and option C is the correct choice.