Consider the function f(x)=8-3x^2. Find the value of f(x) when x=3 and select the correct answer below.
A.-19
B.-10
C.26
D.35
Answers
f(3) = 8 - 3(9)
f(3) = 8 - 27
f(3) = -19
Related Questions
Can you please help me out ??
Answers
sine (25) = 9 / c.
From here we must clear the value of c to find the measure of AB.
Clearing c we have:
c = 9 / (sine (25))
c = 21.29581425
nearest tenth
c = 21.3
Answer:
c = 21.3
which number produces an irrational number when multiplied by 0.5
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pi symbol
what is the rate of decay, as a percent, for the following function n(x)=7(0.067)^x
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Answer: The rate of decay is 93.3%.
Step-by-step explanation:
Since we have given that
The exponential function is given by
[tex]n(x)=7(0.067)^x[/tex]
As we know the general equation of exponential function that is given by
[tex]n(x)=a(1-b)^x[/tex]
Here, a denotes the initial value
1-b denotes the rate of decay.
So, On comparing both the equations, we get that
[tex]1-b=0.067\\\\b=1-0.067\\\\b=0.933=0.933\times 100=93.3\%[/tex]
Hence, the rate of decay is 93.3%.
I really neeed help!! 20 points!!,
Answers
V=14*11*7+5*5*7=1078+175=1253 in³
answer: 1253 in³
the midpoint of PQ is R. R has coordinates (-3,2,-1) and P has coordinates (4,-6,-6). What are coordinates of Q?
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The coordinates of point Q are (-10, 10, 4).
Explanation:To find the coordinates of point Q, we can use the midpoint formula. The midpoint formula states that the coordinates of the midpoint between two points P(x1, y1, z1) and Q(x2, y2, z2) are given by the average of the coordinates:
R = ((x1 + x2) / 2, (y1 + y2) / 2, (z1 + z2) / 2)
In this case, we are given that the midpoint R has coordinates (-3, 2, -1) and one of the points P has coordinates (4, -6, -6). Plugging in these values into the midpoint formula, we can solve for the coordinates of point Q:
Q = (2 * R - P)
Q = (2 * (-3, 2, -1) - (4, -6, -6))
Q = (-6, 4, -2) - (4, -6, -6)
Q = (-10, 10, 4)
The arena would like to estimate its annual running costs for the next twelve months. Use the following first 4 months' figures to estimate the running costs for 12 months. Month Costs January £14,889.51 February £22,936 March £9,856.88 April £6,777.77 The estimated running costs for 12 months is
Answers
Answer:
163,380.48
Step-by-step explanation:
First find the average of the first 4 months' figures.
To do this, find the sum of the first 4 values and then divide by 4, the number of data points:
(14889.51+22936+9856.88+6777.77)/4 = 54460.16/4 = 13615.04
It costs on average £13615.04 per month to run the arena.
This means the estimated running costs for 12 months will be
13615.04(4) = £163,380.48
Find the perimeter of an isosceles trapezoid whose two bases have lengths of 10cm and 16 cm and a side length of 5cm
Answers
The perimeter of the isosceles trapezoid is 36cm.
Explanation:An isosceles trapezoid is a quadrilateral with two parallel sides of unequal length. To find the perimeter of an isosceles trapezoid, we need to add the lengths of all its sides. In this case, the two bases have lengths of 10cm and 16 cm, and one of the side lengths is 5cm. Since the two bases are parallel, the other side length is also 5cm.
The perimeter is calculated by adding the lengths of the bases and the two side lengths: 10cm + 16cm + 5cm + 5cm = 36cm.
a gardener makes a new circular flower bed. the bed is fourteen feet in diameter. Calculate the circumference and the area of the circular flower bed.
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The circumference and the area of the circular bed are 14π feet = 43.9823 feet and 49π feet² = 153.9380 feet² respectively.
How is the circumference of a circle calculated?The circumference is the total length covered by the boundary of an object.
To calculate the circumference of a circle with radius r units, we use the formula: Circumference = 2πr units.
How is the area of a circle calculated?The area of an object is the space its planar face or two-dimensional face covers.
To calculate the area of a circle of radius r units, we use the formula: Area = πr² sq. units.
How to solve the question?In the question, we are asked to find the circumference and the area of the circular flower bed that a gardener makes, having a diameter of fourteen feet.
We know that radius = diameter/2 = 14/2 = 7 feet.
To calculate the circumference of the circular bed, we will use the formula 2πr, where r is the radius.
Substituting the radius, r = 7 feet in the above formula, we get:
Circumference = 2(π)(7) feet = 14π feet = 43.9823 feet.
To calculate the area of the circular bed, we will use the formula πr², where r is the radius.
Substituting the radius, r = 7 feet in the above formula, we get:
Area = (π)(7)² feet² = 49π feet² = 153.9380 feet².
Thus, the circumference and the area of the circular bed are 14π feet = 43.9823 feet and 49π feet² = 153.9380 feet² respectively.
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Most sample surveys use random digit dialing equipment to call residential telephone numbers at random. the telephone polling firm zogby international reports that the probability that a call reaches a live person is 0.15. calls are independent. (a) a polling firm places 7 calls. what is the probability that none of them reaches a person?
Answers
Since the probability of reaching a live person is 0.15, the probability of not reaching someone is 1-0.15=0.85.
The probabilities are independent, which means to find the probability of not reaching anyone on all calls we find (0.85)^7= 0.3206.
The probability that none of the 7 calls reaches a person is approximately 0.1967.
Explanation:To find the probability that none of the 7 calls reaches a person, we need to calculate the probability that each individual call does not reach a person and then multiply those probabilities together.
The probability that a call reaches a live person is 0.15, so the probability that a call does not reach a live person is 1 - 0.15 = 0.85.
Therefore, the probability that none of the 7 calls reaches a person is 0.857 ≈ 0.1967.
Mowing the lawn is one of Jeremy's jobs at home. But, Jeremy's dad offered to help him this week. His dad drew the following diagram of the lawn and told Jeremy to choose one of the parts to mow. If Jeremy wants to mow the rectangle with the smaller area, which one should he choose?
Answers
Let's find out the area of the two parts separately to see which part is smaller.
Area of rectangle is given by Length * Width
Area of Part 1
Width of Part 1 is 16'
Length of Part 1 is 16-12 = 4'
So area of Part 1 is 16*4 = 64' square
Area of Part 2
Width of Part 2 is 8'
Length of Part 2 is 8'
So area of Part 2 is 8*8 = 64' square
So area of both the parts is same . Hence Jeremy may choose any of the parts.
Hope it helps ..!!
For what value of xis the square of the binomial 3x+1 is 9 times greater than the square of the binomial x–2?
Answers
First, we expand the parentheses on both sides using FOIL (Firsts, Outers, Inners, Lasts) :
(3x+1)(3x+1)=9(x-2)(x-2)
9x²+3x+3x+1=9(x²-2x-2x+4
Simplify:
9x²+6x+1=9(x²-4x+4)
Now expand the RHS (right-hand side) expression - multiply all the terms inside the parentheses by 9:
9x²+6x+1=9x²-36x+36
Now solve as you normally would to isolate x. Start off by subtracting 9x² on both sides:
6x+1=-36x+36
Add 36x on both sides:
42x+1=36
Minus 1 on both sides:
42x=35
Divide both sides by 42:
[tex]x= \frac{35}{42} [/tex]
which simplifies to
[tex]x= \frac{5}{6} [/tex]
I double checked this by substituting x back into the question and it worked, you can try doing this too for verification.
Final answer:
The value of x for which the square of the binomial 3x+1 is 9 times greater than the square of the binomial x−2 is obtained by equating (3x + 1)² to 9(x − 2)², which simplifies and solves to x = 5/6.
Explanation:
To find the value of x for which the square of the binomial 3x+1 is 9 times greater than the square of the binomial x−2, we need to formulate and solve an equation based on the given conditions:
(3x + 1)² = 9(x − 2)²
Expanding both sides gives us:
9x² + 6x + 1 = 9x² − 36x + 36
Now, by simplifying and solving for x, we find:
42x = 35
x = 35 / 42
x = 5 / 6
Therefore, the value of x is 5/6.
The diagonals BF and CE divide the hexagon ABCDEF into two equilateral triangles and a square. Find the perimeter of the hexagon if BF = 3 cm. Answer: P = cm
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Because all the sides are the same size
Answer: The perimeter of the hexagon is 18 cm.
Step-by-step explanation: As given in the question, hexagon is shown in the attached figure.
The diagonals g and h divides the hexagon into two two equilateral triangles and one square .
Also, length of diagonal g = 3 cm.
We are to find the perimeter of hexagon.
We know that all the sides of a square are equal, so we have
length of b = length of h = length of e = length of g = 3 cm.
Since the two triangles are equilateral, so all their sides will be equal.
That is, length of a = length of f = length of g =length of c =length of d = length of h = 3 cm.
We know that the perimeter of a polygon is equal to the sum of the lengths of its sides.
Therefore, the perimeter of hexagon is given by
P = a + b + c + d + e + f = 3 + 3 + 3 + 3 + 3 + 3 = 18 cm.
Thus, the perimeter of the hexagon is 18 cm.
The diagonal of rectangle ABCD measures 2 inches in length What is the length of line segment AB?
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In the diagram, we already have the angles given so we just need to find the length of one side. Let's first find the length of segment CD since we are given the angles on that side of the rectangle.
We can find its length by applying SOHCAHTOA. We can either use the 60 or 30-degree angle but for this solution let's make use of 60 degrees. From SOHCAHTOA we know that sine of 60 is equal to the length opposite it (CD) over the hypotenuse which is the diagonal that is equal to 2 inches. Knowing this we can solve for CD:
[tex]sin(60)= \frac{CD}{2} [/tex]
[tex] \frac{ \sqrt{3}}{2}= \frac{CD}{2} [/tex]
[tex] \sqrt{3}=CD [/tex]
Since we have a rectangle, the measure of segment CD will just be equal to the measure of segment AB.
ANSWER: The length of line segment AB is √3 or 1.73 inches.
Answer:
Step-by-step explanation:
B on edge
What is the circumference of a circle circumscribed around a rectangle with sides 10 cm and 24 cm?
Answers
10^2 + 24^2 = 676
sqrt(676) = 26
The formula for circumference is: diameter times pi.
C = 26pi
The equation below shows the total volume (V), in cubic units, of 4 identical boxes with each side equal to s units:
V = 4s3
If s = 2.5 units, what is the value of V?
25 cubic units
30 cubic units
62.50 cubic units
156.25 cubic units
HELP FAST
Answers
Answer:
62.50
Step-by-step explanation: im smart
a cube has a width of 20 ft what is the surface area of the cube
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The surface area of the cube is 2,400 square feet.
To find the surface area of a cube, one must use the formula:
[tex]\[ \text{Surface Area} = 6 \times (\text{side length})^2 \][/tex]
Given that the width of the cube is 20 feet, we can assume that all sides of the cube are equal, since a cube has all sides of equal length. Therefore, the side length of the cube is 20 feet.
Now, we can substitute the side length into the formula:
[tex]\[ \text{Surface Area} = 6 \times (20 \text{ ft})^2 \] \[ \text{Surface Area} = 6 \times 400 \text{ ft}^2 \] \[ \text{Surface Area} = 2,400 \text{ ft}^2 \][/tex]
Thus, the surface area of the cube is 2,400 square feet.
for a rectangular solid with length 12 in width 2 in in height 15 in state the appropriate formula for volume and also find the volume
Answers
Eric's father Works two part-time jobs one in the morning and one in the afternoon and works a total of 40 hours each 5-day work week. if his schedule is the same each day, and he works 3 hours each morning, how many hours does Eric's father work each afternoon
Answers
40 - 15 = 25
He works 25 hours in the afternoon every week.
25 / 5 = 5
So his father works 5 hours every after noon 5 days out of the week
The number of hours does Eric's father work each afternoon is 5 hours.
Given that,
A total of 40 hours each 5-day work week. And, his schedule is the same each day, and he works 3 hours each morning.Based on the above information, the calculation is as follows:
[tex]= (40 - (3\times 5)) / div 5\\\\= (40 - 15) \div 5\\\\= 25 \div 5[/tex]
= 5
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Find an equation of the plane. the plane through the point (3, −8, −2) and parallel to the plane 9x − y − z = 7
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Final answer:
The equation of the plane parallel to the given plane 9x - y - z = 7 and passing through the point (3, -8, -2) is 9x - y - z = 37.
Explanation:
The question involves finding an equation for a plane that is parallel to a given plane and passes through a specific point. Since the planes are parallel, they will have the same normal vector, and thus the same coefficients for x, y, and z. The given plane's equation is 9x - y - z = 7, so the normal vector is (9, -1, -1). Our plane must also have this normal vector, meaning our plane's equation will have the form 9x - y - z = D, where D is a constant we need to find such that the plane passes through the point (3, -8, -2).
Substituting this point into the equation gives us 9(3) - (-8) - (-2) = D, which simplifies to 27 + 8 + 2 = D. Therefore, D = 37 and the equation of our plane is 9x - y - z = 37.
If A ⊂ B, then A ∩ B = A ∪ B.
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The statement "If [tex]\( A \subset B \)[/tex], then [tex]\( A \cap B = A \cup B \)[/tex]" is not always true; it holds only if A = B.
The statement "If [tex]\( A \subset B \)[/tex], then [tex]\( A \cap B = A \cup B \)[/tex]" is not always true.
If [tex]\( A \subset B \)[/tex], it means that every element in set A is also in set B.
Now, consider the intersection of A and B [tex](\( A \cap B \))[/tex]. This intersection contains all elements that are common to both sets A and B.
On the other hand, the union of A and B [tex](\( A \cup B \))[/tex] contains all elements that are in either set A or set B, or both.
Since A is a subset of B, all elements in A are already in B, which means [tex]\( A \cap B = A \)[/tex]. However, [tex]\( A \cup B \)[/tex] would just be B, because all elements in A are also in B, so [tex]\( A \cup B \)[/tex] is simply B.
Therefore, the statement "If [tex]\( A \subset B \)[/tex], then [tex]\( A \cap B = A \cup B \)[/tex]" is not true in general; it is true only if A = B .
C=
5\9
(F−32)
The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Celsius. Based on the equation, which of the following must be true?
I.) A temperature increase of 1 degree Fahrenheit is equivalent to a temperature increase of 5\9 degree Celsius.
II.) A temperature increase of 1 degree Celsius is equivalent to a temperature increase of 1.8 degrees Fahrenheit.
III.) A temperature increase of 5\9 degree Fahrenheit is equivalent to a temperature increase of 1 degree Celsius.
A) I only
B) II only
C) III only
D) I and II only
Answers
PLEASE HELP!! 30 POINTS
Match the graph with the correct equation.
A) y + 3 = –(x + 5)
B) y – 3 = –(x + 5)
C) y – 3 = (x + 5)
D) y – 5= –(x + 3)
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In a rhombus MPKN with an obtuse angle K the diagonals intersect each other at point E. The measure of one of the angles of a ∆PKE is equal 16°. Find the measures of all angles of ∆PKE and ΔPMN.
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The second is that all the sides are congruent. That's actually the key to the problem (or one of them.
The third is that the diagonals are line segments that bisect the angles where the vertex of the angle is.
So just to make sure you understand what that last statement means <PKM = <NKM
K is the vertex of angle PKN
Now the really heavy duty stuff about your question.
Given
K is obtuse. Therefore <PKM can't be 16o because MKN would also have to be 16 degrees and together they don't add up to anything over 90o.
So the 16o angle is at <EPK
Remember that the diagonals meet at right angles. <PEK = 90o
Finally all triangles have 180o
< PKE = 180 - 16 - 90 = 74. So to review
<PKE = 74o
<EPK = 16o
<PEK = 90o That's one half the problem.
Moving on to triangle PMN
By the properties of parallel lines and a rhombus and isosceles triangles, that since PKN is bisected (rhombus property) Then PKN = 2* PKM =2*74 = 148o
The angle opposite <PKN is equal to <PKN so <PMN = <PKN
Since PKN = 148 then PMN = 148
Since KPN = 16o then PMN = 16o
Since triangle <PMN is isosceles <PNM = 16o
Summing up
PMN = 148o
MPN = 16o
MNP = 16o
That's both triangles solved. This is a really nice little problem. If you google properties of a rhombus, you will find all the properties I have used proven.
Answer:
m∠KEP = 90°
m∠EKP = 74°
m∠EPK = 16°
m∠N PM= 16°
m∠MNP = 16
m∠M = 148°
Step-by-step explanation:
If you do RSM those are the answers
if you are flipping a coin what is the sample space
Answers
Answer:
Solution: {Heads, Tails}.
Step-by-step explanation:
Solution: {Heads, Tails}.
Sample space is a list of all the possible outcomes for the event. For flipping a coin the outcomes are {Heads, Tails}.
Which statements are true regarding the regular dodecagon? Check all that apply.
The smallest angle of rotational symmetry for the dodecagon is 30°.
The dodecagon has a rotational symmetry of 180°.
The order of rotational symmetry for the dodecagon is 10.
The dodecagon has a rotational symmetry of 135°.
The angles of rotational symmetry for the dodecagon are multiples of 30°.
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The statements that can be inferred to be true regarding the regular dodecagon include:
The smallest angle of rotational symmetry for the dodecagon is 30°.The dodecagon has a rotational symmetry of 180°.The angles of rotational symmetry for the dodecagon are multiples of 30°.A dodecagon simply means a twelve-sided star polygon that encloses space. It can be regular when all the interior angles and sides are equal.
It should be noted that the smallest angle of rotational symmetry for the dodecagon is 30° and it has a rotational symmetry of 180.
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The classroom encyclopedia set seems to fill a shelf that is 24 in long each book is 3/4 in thick how many books are in the classroom set
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The Heller family is having a cookout. To be sure that they have enough food, they plan to have 0.5 pound of hamburger for each adult and 0.25 pound for each child. There will be 15 children at the cookout. If they buy 10 pounds of hamburger, what is the maximum number of adults they expect?
Answers
(1lbs=4 kids, 15 divided by 4= 3.75)
6.25 divided by .5 is over 12
so 12 adults
Answer:
12
Step-by-step explanation:
Which measurement statement is correct?
A. There are 2 cups in a pint
B. There are pints in a cup
C. There are 4 quarts in a pint
D. There are 4 pints in quart
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Margaret wants to call her friend overseas. There is a connection fee of $2 and a charge of $1.50 per minute. So the cost of the call is 2 + 1.5t dollars for t minutes.
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How can you find the surface area of a composite solid made up of prisms
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