Answers
Answer:
d) {(-2,0), (-1,0), (1,0), (2,0)}
Step-by-step explanation:
We know that,
→ A set function has different x values.
Then the set function will be,
a) {(1,0), (1,1), (2,2), (2,2)}
→ The x values underlined are repeated.
Hence, it is not a set function.
b) {(0,0), (1,1), (1,1), (3,3)}
→ The x values underlined are repeated.
Hence, it is not a set function.
c) {(0,-2), (0,-1), (0,1), (0,2)}
→ The x values underlined are repeated.
Hence, it is not a set function.
d) {(-2,0), (-1,0), (1,0), (2,0)}
→ There are no repeated values for x.
Hence, it is a set function.
Related Questions
f(n)=-3n+7; find f(-8)
Answers
Answer:
f(-8) = 31
Step-by-step explanation:
f(-8) = -3(-8) + 7
= 24 + 7
= 31
Using only a compass and a straightedge, you are constructing a line perpendicular to AB and passing through a given point, M, on AB. With a
compass of set width, you have drawn arcs that intersect AB on each side of M and marked the two intersection points as P and Q.
The next step in this construction is to place the compass needle on
Answers
P (or Q) and mark an arc roughly where M's reflection across AB is located.
How to use a compass?One tool for drawing circles is a compass. According to the circle's radius, which is drawn with a compass, the sizes of the circles vary.
A compass's handle is held in place by our thumb and forefinger. A circle is typically drawn using just one hand. Between the forefinger and thumb, the compass is turned.
Around this point, the pencil tip is rotated. The circle's radius is determined by the distance between the pencil tip and the compass needle. A ruler is used to set it. The gap can be adjusted by adjusting the angle between the compass's arms.
At that point of reflection (M'), arcs drawn from P and Q in M's approximate location across AB will intersect. As desired, the line passing through point M and perpendicular to AB will connect M and M'.
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2. Last year, 70% of 1 million Philadelphians got their flu shots. About 2% of people who got
their shot got sick with the flu. 6% of people who did not get their flu shot got sick. What is
the probability that a Philadelphian who got the flu got a flu shot? Using bayes rule
Answers
The conditional probability that a Philadelphian who got the flu got a flu shot is of:
0.4375 = 43.75%.
What is Conditional Probability?Conditional probability is the probability of one event happening, considering the outcome of a previous event.
The formula is presented as follows:
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
In which each probability in the formula is described as follows:
P(B|A) is the probability of the event B happening, given that the event A happened.[tex]P(A \cap B)[/tex] is the probability of both the events A and B happening.P(A) is the probability of the event A happening.In the context of this problem, the events are described as follows:
Event A: Got the flu.Event B: Got the flu shot.The probability of people who got the flu is obtained as follows:
2% of 70%. (got the shot).6% of 30%. (did not get the shot).Hence:
P(A) = 0.02 x 0.7 + 0.06 x 0.3 = 0.032.
The probability of both getting the flu and the shot is:
P(A and B) = 0.02 x 0.7 = 0.014.
Hence the conditional probability that a Philadelphian who got the flu got a flu shot is calculated applying the conditional probability formula as follows:
P(B|A) = P(A and B)/P(A) = 0.014/0.032 = 0.4375 = 43.75%.
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Consider a case where 400 fish are tagged and released during a first outing. During a second outing in the same area, 400 fish are again caught and released, of which half are already tagged. Estimate N, the total number of fish in the entire sampling area.
Answers
The total number of fish in the entire sampling area is 600
Sampling:
The process of selecting the group that you will actually collect data from in your research is called sampling.
Given,
Consider a case where 400 fish are tagged and released during a first outing. During a second outing in the same area, 400 fish are again caught and released, of which half are already tagged.
Here we need to find the total number of fish in the entire sampling area.
Let us consider N be the number of fish in the entire sampling area.
While looking through the given question,
We have identified the following,
Number of fish tagged = 400
Next time number of fish caught = 400
We know the half of them are tagged, so the untagged fishes are
=> 400/2
=> 200
Therefore, the total number of fishes is
=> 400 + 200
=> 600
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Write a verbal expression or word problem that could be represented by the following equation.
2x + 7 = 35
Answers
The required verbal expression : Twice of a variable x when added with 7 will give a constant equal to 35
What is a variable ?An unknown numerical value in an equation or algebraic expression is represented by a symbol (typically a letter) in algebra. A variable is, to put it simply, a quantity that is changeable and not fixed and is frequently represented by an alphabet.
What is a verbal expression ?A verbal statement is a mathematical problem. Algebraic 8 + 6 is an example of using numbers and numeric variables. It is necessary to be familiar with the words used to describe mathematical operations in order to translate between verbal statements and algebraic expressions.
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Please help me it’s due.
Answers
Answer:
A = Research question
B = Hypothesis
C = Analysis of data
D = Reflecting on the results
Step-by-step explanation:
Im 85% sure
Use the value of the discriminant to determine whether the quadratic equation has two rational solutions, two irrational solutions, one repeated real solution, or two complex solutions that are not real.
3z² +3z +10=0
Choose the correct answer below.
O A. one repeated real solution
OB. two irrational solutions
OC. two rational solutions
OD. two complex solutions that are not real
Answers
Answer:
D
Step-by-step explanation:
discriminant = 9 - 4(10 * 3)
9 - 4 * 30
9 - 120 = -111
Is negative so the equation has two complex solutions
Kelly drank .86 of her Gatorade and John drank 7/8 of his Ginger Ale. Who drank less?
Answers
PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
Step-by-step explanation:
That's a lot of exclamation marks :DDDDD
Rate of change, Δ often said as "delta" or also known as slope of a line. Rate of change is much easier when it's a line
it's just the slope of the line.
I see that the line in the picture... so the graph of the line.... is going down 1 after it goes over 4... so rate of change is rise over run..
-1 / 4
see how I got that?
so B) looks good
Graph the inequality on the axes below.
x + 3y ≥ 9
Answers
i need help, image attached. thanks ahead of time :)
Answers
The value of x's in the equation of angles are :-
1. 4.729
2. 7
3. 13
4. 10
What are parallel line ?In geometry, lines are categorized into different types such as: Parallel lines, vertical lines, intersecting lines, non-intersecting lines, etc. For lines that do not intersect, you can draw special lines called horizontal lines that intersect these lines at different points. In this article, we will discuss parallel lines in detail. Two parallel lines that meet at infinity can also be called parallel lines. For a line to be horizontal, two or more lines must intersect at different points. Angle relationship between parallel lines and horizontal linesDifferent angle pairs are created when a horizontal line crosses two or more parallel lines.Calculation1 . 25x - 5 + 12x = 180
37x = 175
x = 4.729...
2. 15x - 7 = 14x
x = 7
3. 5x +39 = 8x
3x = 39
x = 13
4 . 4x + 12x + 20 = 180
16x = 160
x = 10
now put the values of each x in the equations of angle to find the angle .
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Alex, Stephen and Bridget share some sweets in the ratio 5:4:2. Alex gets 21 more sweets than Bridget. How many sweets are there altogether?
Answers
Alex, Stephen and Bridget have 77 sweets altogether.
According to the question,
We have the following information:
Alex, Stephen and Bridget share some sweets in the ratio 5:4:2. Bridget gets 21 more sweets than Alex. (This is the correct statement otherwise the answer will be in negative which is not possible.)
Now, let's take the number of sweets Alex has to be 5x, that of Stephen to be 4x and that of Bridget to be 2x.
Now, we have the following expression:
2x+21 = 5x
Subtracting 2x from both sides:
21 = 5x-2x
3x = 21
x = 21/3
x = 7
Now, we have the following number of sweets:
Alex = 5*7 = 35
Stephen = 4*7 = 28
Bridget = 2*7 = 14
Now, total number of sweets:
35+28+14
77
Hence, Alex, Stephen and Bridget have 77 sweets altogether.
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A plane is 141 mi north and 162 mi east of an airport. Find x, the angle the pilot should turn in order to fly directly to the airport. Round your answer to the nearest tenth of a degree.
Answers
The value of x = 41.02°
Trigonometric Ratios:The ratios of lengths of a right-angled triangle's sides are known as trigonometric ratios. These trigonometric ratios connect the ratio of a right triangle's sides to each angle.
The basic trigonometric ratios:sin = (Opposite side/ Hypotenuse)
cos = (Adjacent side/ Hypotenuse)
tan = (Opposite side/ Adjacent side)
Here we have
A plane is 141 m north and 162 m east of an airport.
x is an angle that the pilot should turn in order to fly directly to the airport.
[ The picture that can represent the above information is given below ]
From given figure
ABC is a right-angled triangle with a right angle at A
As we know from trigonometric ratios
Tan θ = Opposite side/Adjacent side
⇒ Tan x = 141/162
⇒ Tan x = 141/162
⇒ Tan x = 47/54
⇒ Tan x = 0.870
⇒ x = Tan⁻'(0.870)
⇒ x = 41.02°
Therefore,
The value of x = 41.02°
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round off to the nearest 10 "728.35"
Answers
Hence u would have to round it off until the tens place…. So u look at the ones place which is 8 and since 8 is bigger than 5….. then u would have to add 1 to the 2 in the tens place to become 3
Hence the answer would be 730 (don’t need the decimals as they are smaller than 1
Answer:
730:35
Step-by-step explanation:
that's the answer
Select the transformation
the pre-image FISH onto its image F'I'S'H'.
[₁
S'
H
F₁ H'
FL
rule that correctly maps
S
T
Answers
The vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'.
What is graph transformation?
The process of altering a graph to produce a different version of the preceding graph is known as graph transformation. The graphs can be moved about the x-y plane or translated. They can also be stretched, or they can undergo a combination of these changes. We discuss the various graph transformations in this post.Graph stretching
A function's graph can be stretched by adding a constant factor to it or to one of its independent variables. The stretch could be horizontal or vertical. Let's talk about stretching horizontally and vertically.Observing each of the vertices of the square, we can say that the vertices have been shifted toward the left by 1 unit and also 3 units up to form the image F'I'S'H'. So, the transformation involved in moving the preimage FISH to form F'I'S'H' the image is translation.
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33 is what percent of 132?
Answers
33/132=.25 then you multiply .25 by 100 which is 25 and you just add the percent sign
- Solution for 33 is what percent of 132:
- Percentage solution with steps:
Step 1: We make the assumption that 132 is 100% since it is our output value.
Step 2: We next represent the value we seek with "x".
Step 3: From step 1, it follows that 100%=132
Step 4: In the same vein, x%=33
Step 5: This gives us a pair of simple equations:
100%=132(1)
x%=33(2)
Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS (left-hand side) of both equations have the same unit (%); we have
100%/x% = 132/33
Step 7: Taking the inverse (or reciprocal) of both sides yields
x%/100%=33/132
x=25%
Therefore, 33 is 25% of 132
What is the sum of (3x + 4) + (9x – 10)?
Answers
Step-by-step explanation:
(3x+4)+(9x-10)
= 3x+4+9x-10
=3x+9x+4-10
=12x-6
ANSWER IS 12X-6
Answer:
The solution is 12x-6
Step-by-step explanation:
(3x+4)+(9x-10)
We remove the brackets
= 3x+4+9x-10
= 3x+9x+4-10
= 12x-16
The area of a rectangle and its length, if its width is 2cm
Answers
The area is 35, which means LW=35.
We also know that width is two less than the length.
If we represent the length width X, then L=X-2. Using our area function X*L=35, we substitute our new value of L for X-2 and get X(X-2)=35. Distribute to get X2-2X=35 → set equal to zero by subracting 35 from both sides X2-2x-35=0.
With this polynomial, we find the factors. Two factors of 35 that have a digit difference of 2 are 5 and 7, but one has to be negative since 35 is negative in our polynomial and it must be the larger one because we have -2X instead of +2X in the middle. We get -7 and 5.
We can write our new factors as
(X-7)(X+5)=0, giving us critical values of 7 and -5. We aren't able to have negative lengths so our X value is 7. That's our Width. To find our Length we use L=X-2 → L=7-2 → L=5
There you have it, the Length is 5 cm and the width is 7 cm
What was the winner's speed during last year's race? (3 points for speed, 2 points for conversion to knots).
Given: 6076 feet/nautical mile.
The winner's time was 16.5 minutes.
(distance unknown)
Part VIII of 2.11.2 Project: Performance Task: The Parrallax Problem apex
Answers
The speed of the winner based on the information is 368.24 mile per minutes
How to calculate the speed ?It should be noted that speed is calculated as the distance divided by the time given.
The following can be deduced from the information given:.
Distance = 6076 feet/nautical mile.
Time =16.5 minutes.
Speed = Distance / Time
Speed = 6076 / 16.5
Speed = 368.24 mile per minutes
The speed is 368.24 mile per minutes.
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simplify 4x5 - 25x³/ 2x-5
Help me and I'll reward you.
Answers
Answer:
i don't understand
Step-by-step explanation:
the question is 11 divided 2and2over 3
[tex]=\frac{x^{3}(4x^{2} -25) }{2x-5} \\=\frac{x^{3} (2x+5)(2x-5)}{2x-5} \\=x^{3} (2x+5)\\=2x^{4}+5x^{3}[/tex]
⇒Note there was a 2x-5 in the numerator and a 2x-5 in the denominator so they canceled each other. Leaving the above expression.
3. The table below shows the temperature of an oven, in degrees Fahrenheit, t minutes
after it is turned on.
Oven Temperature
Time, t
(in minutes)
0
3
5
Temperature, F
(in °F)
70
160
220
10
370
An equation for a line of best fit for these data is F = 30t + 70. What is the slope of this
line, and what does it represent?
Answers
The slope of this line, and what it represent is: The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
How to identify and interpret the slope?Mathematically, the standard form of the equation of a line can be calculated by using this equation:
y = mx + c .......equation 1.
Where:
m represents the slope.x and y represent the variables.c represents the y-intercept.From the information provided, we have the following equation of line:
F = 30t + 70 ..........equation 2.
Comparing equation 1 and equation 2, we have:
Slope, m = 30, which is the increase in temperature of the oven in degrees Fahrenheit.
y-intercept, c = 70, which also represents the initial temperature of the oven in degrees Fahrenheit.
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Complete Question:
The table below shows the temperature of an oven, in degrees Fahrenheit, t minutes after it is turned on. An equation for a line of best fit for these data is F = 30t + 70. What is the slope of this line, and what does it represent?
answer choices
The slope is 30, and it represents the initial temperature, in degrees Fahrenheit, of the oven.
The slope is 70, and it represents the initial temperature, in degrees Fahrenheit, of the oven.
The slope is 30, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
The slope is 70, and it represents the increase in temperature, in degrees Fahrenheit, each minute the oven is on.
Aslam invested rs 210000part at 8% per annum and the rest at 6%per annum. if the annual incomes from both investment were the same, find the amount invested at each rate.
Answers
a = amount invested at 8%
how much is 8% of "a"? (8/100) * "a", namely 0.08a.
b = amount invested at 6%
how much is 6% of "b"? (6/100) * "b", namely 0.06b.
we know the total amount invested is 210000, so whatever "a" and "b" might be, we know that a + b = 210000.
we also know that the yielded amount in interest is the same for both, so whatever 0.08a and 0.06b are, we know they're the same.
[tex]\begin{cases} a+b=210000\\\\ 0.08a=0.06b \end{cases}\hspace{5em}a+b=210000\implies b=210000-a \\\\\\ \stackrel{\textit{substituting on the 2nd equation}}{0.08a~~ = ~~0.06(210000-a)}\implies 0.08a=12600-0.06a\implies 0.14a=12600 \\\\\\ a=\cfrac{12600}{0.14}\implies \boxed{a=90000}\hspace{9em}\boxed{\stackrel{210000~~ - ~~90000}{b=120000}}[/tex]
if you had to serve six persons equally from a standard 750-ml. bottle of champagne, how many oz. could you serve each of them?
Answers
If you were serving a metric standard 750 ml bottle of champagne to 6 people equally, you would need to pour 4.2 fl oz to each one of them to get 6 equal serving.
A bottle of champagne with a metric unit of volume of 750 ml divided equally among 6 people will give each of them a 125 ml serving of champagne by volume.
750/6=125
Converting metric system to imperial unit of volume of US fluid ounce, with 1 fl oz = 29.57 ml, you will get:
125/29.57=4.23
Hence you will be pouring each one of them 4.2 fl oz serving of champagne.
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show all work
An employee receives a 4% raise once per year. If the employee’s initial salary is $40,000, what will the employee’s salary be after 8 years?
(2 points –1 writing the exponential equation, 1 salary after 8 years)
Answers
Exponential equation S is 40,000(1.04)^8, and Salary after 8 years: S is $64,735.20.
What is Exponential equation?An exponential equation is an equation that contains a variable in the form of an exponent. It is used to solve problems involving exponential growth and decay. The equation has the form y = a × b^x, where "a" is the initial value, "b" is the base of the exponent, and "x" is the exponent. This equation can be used to find the value of y, given a value for x. Exponential equations are commonly used in fields such as mathematics, physics, economics, and biology.
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how do you find the measure of each angel indicated??
Answers
Answer:
by knowing the sum of the shape represented
what is the probability that in seven rolls of a six-sided die, the result of 2 appears exactly 4 times?
Answers
1/6 is the probability that in seven rolls of a six-sided die, the result of 2 appears exactly 4 times
Define Probability
Probability can be defined as the likelihood or chance of an event occurring.
Probability is a branch of Mathematics that deals with the calculation on the chances of happening of a particular event.
The probability of getting some number in a cube corresponds to 1/6, the cube has six sides.
P(1) =1/6
P(2) =1/6
P(3)=1/6
P(4)= 1/6
P(5)=1/6
P(6)= 1/6
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a spherical balloon is inflated so that its volume is increasing at the rate of 3.7 ft3/min. how rapidly is the diameter of the balloon increasing when the diameter is 1.5 feet?
Answers
Using Sphere geometry formulas , 2.45 ft/min is increasing rate of spherical ballon when the diameter is 1.5 feet.
Sphere is a three dimensional form of circle .
let V and D be volume and diameter of the sphere. we have given that ,
Volume increasing rate of spherical ballon (dV/dt)
= 3.7 ft³/min
diameter of sphere at time of increasing = 1.5 feet
the increasing rate of spherical ballon is dD/dt.
Now, Volume of sphere (V) = 4/3π³ ft³
or we know that D = r/2 so,
V = 4/3 π (D)³×8 ft³
differentating both sides we get ,
dV/dt = 32/8π 3D³dD/dt
=> 3.7 = 32/3 (3.14)(1.5)²dD/dt
=> dD/dt= 2.45 feet/min
Hence, 2.45 ft/min is the rate of the diameter of the balloon increasing when the diameter is 1.5 feet.
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a landscaping company ordered 17 plants and 8 trees for a total $ 964. if plants are $ 12 each, write and solve a linear equation to find the cost for each tree
Answers
Answer:
$95
Step-by-step explanation:
If 1 plant is $12 each, 17 plants will be
= 17($12)
= $204
Substitute the number of trees for x
The total cost of both is $964
Hence,
17($12) + 8(x) = $964
$204 + 8x = $964
Collect like terms
8x = $964 - $204
8x = $760
Divide both sides by 8
8x/8 = 760/8
x = $95
Mario purchased a storage cube with a volume of 27 cubic feet. he wants to sit it on a shelf that is 4 feet wide wide. volume: 27ft³ Will the cube fit on the shelf? Explain how you know
Answers
Answer:
No, the cube will not fit on the shelf because it is too big. The shelf is only 4 feet wide, but the cube is 27 cubic feet, which is much bigger.
Reduce -34/87 to the lowest terms.
Answers
The value of the fraction -34/87 to the lowest term is still -34/87 as there's no common factor.
How to reduce to lowest term?A fraction is simply a piece of a whole. The number is represented mathematically as a quotient where the numerator and denominator are split.
To reduce to lowest term, divide the numerator and denominator by the greatest common factor to reduce a fraction to its simplest terms.
The steps involved are:
Divide the numerator (top number) and the denominator (bottom number) into prime factors.Remove any commonalities.Multiply the remaining numbers to get the numerator and denominator with the reduced numerator and denominator.In this case, there is no common factor and the value is still the same as -34/87.
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