If a ⊂ b, b may have more elements than a. True false
That's true. If A is a subset of B, it means that every element in A is also an element in B. This means that B has, at least, as many elements as A. Nothing prevents B from having more elements though, which don't belong to A.
Consider this example:
[tex] A = \{1,2,3,4\},\quad B=\{1,2,3,4,5,6\} [/tex]
A is a subset of B, because every element of A (1,2,3,4) is also an element of B (1,2,3,4 are in B as well).
Still, B has two more elements (5,6) which don't belong to A, so a superset can have (and typically does actually) more elements than its subset.
Final answer:
The statement is true; if set A is a subset of set B (A⊂B), it means all elements of A are also in B, but B can have more elements.
Explanation:
The statement If a ⊂ b, b may have more elements than a is true. In set theory, the symbol ⊂ denotes that one set is a subset of another. If we say that set A is a subset of set B (A⊂B), it means that all elements of A are also in B. However, B can have additional elements that are not in A, which would make it larger. To illustrate, if we have A = {1,3} and B = {1,2,3,4}, A is a proper subset of B because all elements of A are in B, but B has more elements (2 and 4) that are not in A. If A and B were identical, then we would say A = B, not A⊂B.
Justin's football team has a phone tree in case a game is cancelled. The coach calls two players. Then each of those players calls 2 players, and so on. How many players will be notified during the 2nd round of calls?
Which values are possible rational roots of 4x3+9x2−x+10=0 according to the rational root theorem? Select each correct answer. ±12 ±2 ±52 ±25
ANSWER
The possible rational roots are:
[tex]\pm\frac{1}{2},\pm2,\pm \frac{5}{2}[/tex]
EXPLANATION
According to the rational root theorem, the possible rational roots of the polynomial,
[tex]4x^3+9x^2-x+10=0[/tex]
are all the possible factors of the constant term divided by all the possible factors of the coefficient of the highest degree of the polynomial.
Therefore we examine the numerator and denominator of the options provided to see if they are factors of 10 and 4 respectively.
For
[tex]\pm\frac{1}{2}[/tex], we can see that 1 is a factor of 10 and 2 is a factor of 4, hence it is a possible rational root.
The same thing applies to [tex]\pm2,\pm \frac{5}{2}[/tex] also.
As for
[tex]\pm \frac{2}{5}[/tex], 2 is a factor of 10 but 5 is not a factor of 2, hence it is not a possible rational root.
The values of the possible rational roots of 4x³ + 9x² - x + 10 = 0 among the options are;
±½, ±2, ±5/2
The rational root theorem states that if a polynomial has any rational roots, then the rational roots must be of the form;
±(factors of the coefficient of the constant term/factors of coefficient of the term with the highest degree)
Now, the polynomial we are given is;4x³ + 9x² - x + 10 = 0
The constant term here is 10 and it has factors as; 1, 2, 5, 10The coefficient of term with the highest degree here is 4 and it's factors are; 1, 2, 4.Thus, the rational roots could be;
±(½, 2, 5/2, 5)
Looking at the options, the only correct possible rational roots are;
±½, ±2, ±5/2
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Complete the explanation of what happens when you round 4.975 to the nearest tenth.
since they're is a ____ in the hundredths place, the number in the tenths place will be__
Since 9+1=10 a ____ will go in the tenths place and ___ will be added to the 4 in the ones place making the answer ____
To round 4.975 to the nearest tenth, since the hundredths place has a 7, you round up, leading the tenths place (9) to increase by 1, turning into a 0, and the ones place (4) to also increase by 1, resulting in 5.0 as the answer.
When you round 4.975 to the nearest tenth, since there is a '7' in the hundredths place, the number in the tenths place will be affected by rounding rules. According to the standard rules for rounding numbers, if the first dropped digit is 5 or higher, you round up. Since 7 is greater than 5, you add 1 to the tenths place. Therefore, 9 in the tenths place plus 1 equals 10, which means a '0' will go in the tenths place and an additional '1' will be added to the 4 in the ones place, making the rounded number 5.0.
Can someone help me for question 18 pls? I really need help to solve this question!!
Plug the x-values from the table into the given equation and solve for y.
y = 5 - x²
First column
replace x with -2
y = 5 - (-2)²
= 5 - (4)
= 1
(x, y) = (-2, 1)
Second column
replace x with -1
y = 5 - (-1)²
= 5 - (1)
= 4
(x, y) = (-1, 4)
Third column
replace x with 0
y = 5 - (0)²
= 5 - (0)
= 5
(x, y) = (0, 5)
Fourth column
replace x with 1
y = 5 - (1)²
= 5 - (1)
= 4
(x, y) = (1, 4)
Fifth column
replace x with 2
y = 5 - (2)²
= 5 - (4)
= 1
(x, y) = (2, 1)
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
y = 5cos(πx/4) +11
Step-by-step explanation:
The radius is 5 ft, so that will be the multiplier of the trig function.
The car starts at the top of the wheel, so the appropriate trig function is cosine, which is 1 (its maximum value) when its argument is zero.
The period is 8 seconds, so the argument of the cosine function will be 2π(x/8) = πx/4. This changes by 2π when x changes by 8.
The centerline of the wheel is the sum of the minimum and the radius, so is 6+5 = 11 ft. This is the offset of the scaled cosine function.
Putting that all together, you get
... y = 5cos(π/4x) + 11
_____
The answer selections don't seem to consistently identify the argument of the trig function properly. We assume that π/4(x) means (πx/4), where this product is the argument of the trig function.
Answer:
Step-by-step explanation:
You have to start by making a small chart of what is happening at what time.
x 0 4 8
y 16 6 16
Essentially this is a cosine function.
Now you need to fill in some of the details. The key is what is happening at x = 4 seconds? At that time, you must add a minus amount in the cosine function to the amplitude to get 6. The only way to do that is if you have
y = 5* cos( (x/4)*pi) + 11
y = 5*cos( (4/4)*pi) + 11
y = 5 * cos(pi) + 11
y = 5 * (-1) + 11
y = -5 + 11 = 6
==================
x = 0
y = 5* cos( (pi/4)*0 ) + 11
y = 5 * cos(0) + 11
y = 5 (1) + 11
y = 16
===================
x = 8 seconds
y = 5*cos(8/4)*pi) + 11
y = 5*cos(2*pi) + 11
y = 5 * (1) + 11
y = 16
==================
The question is where did the 11 come from?
The Ferris wheel has a diameter of 10 feet and a radius of 5
The high and low points are 16 and 6.
The center of the Ferris wheel is between 16 and 6. Between in this case means average.
(16 + 6)/2 = 22/2 = 11
12 minutes to drive 30 laps and 48 minutes to drive 120 laps are they equivalent
30/12=in 1 min you drive 2.5lap
120/48=in 1 min you drive 2.5lap
yes they are equivalant
If they are equivalent, you should be able to cross multiply and get a true statement.
12/30 = 48/120
12(120) = 30(48)
1440 = 1440
This is a true statement, therefore they ARE equivalent.
Rachel was cutting out some fabric for a friend she cut a piece that was 5 cm wide and had an area of 20 cm squared how long was the peace
The length of the fabric is 4 cm.
Explanation:To find the length of the piece of fabric, we need to divide the area by the width. The area of the fabric is given as 20 cm squared and the width is given as 5 cm. So, to find the length, we divide 20 cm squared by 5 cm:
Length = Area / Width
Length = 20 cm2 / 5 cm
Length = 4 cm
Therefore, the length of the piece of fabric is 4 cm.
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Jayden bought 12 tickets to see Kendrick Lamar. Each tickets costs $75.25. How much did he spent on tickets.
He spent roughly $903
Answer: 903
Step-by-step explanation:
If the equation of a line is 4x+4y=1 and the equation of a second line is x+y =-8. Which of the following is true? A. The lines are perpendicular
B. The lines are parallel
C. Both lines intersect at point (0,-8)
D. The lines share the same x-intercept
Convert the equations to slope/intercept form:-
4x + 4y = 1
4y = -4x + 1
y = -1x + 1/4 The slope of this line is -1
x + y = -8
y = -1x - 8 This also has a slope of -1
So B is true. The lines are parallel.
Final answer:
The two lines with equations 4x+4y=1 and x+y=-8 are parallel because they both have the same slope of -1. They do not intersect at the point (0,-8), nor do they share the same x-intercept since their x-intercepts are different when y=0.
Explanation:
To determine the relationship between the two lines with equations 4x+4y=1 and x+y=-8, we should first put them in slope-intercept form, which is y = mx + b, where m represents the slope and b the y-intercept.
For the first equation, dividing every term by 4 yields y = -x + 0.25, which has a slope of -1. For the second equation, we can see directly that rearranging it gives y = -x - 8, which also has a slope of -1.
Since both lines have the same slope, they are parallel. To check if they intersect at the point (0,-8), we can substitute x=0 into both equations. The first equation gives y = 0.25, which is not -8, so they do not intersect at (0,-8). For the x-intercepts, we set y=0 in both equations. The first gives x = 0.25, and the second gives x = -8, so they do not share the same x-intercept either.
Therefore, the correct answer is B. The lines are parallel.
A radio station has no more than $25000 to give away
I'd like to answer your question but there's not enough information.
Answer:
there needs to be a better explantion
Step-by-step explanation:
A cylinder has a volume of 628 cubic inches and a radius of 10 inches. What is the height of the cylinder
Answer:
Height of cylinder = 2 inches
Explanation:
If a cylinder has a base radius r and height h, the volume of cylinder is given by the expression, Volume V = πr²h.
Here given that volume of cylinder = 628 cubic inches = 628 inch³
Radius of base circle = 10 inch.
Substituting in the volume of cylinder equation
628 = π x 10² x h
[tex]h= \frac{628}{\pi *10^2} \\ \\ h=2.00 inches[/tex]
So , height of cylinder = 2 inches
Which functions have graphs that are less steep than the graph of f(x)=2x2 ?
Select each correct answer.
m(x)=3x2
g(x)=−3x2
h(x)=−2x2
k(x)=x2
j(x)=−x2
Answer:
k(x) = x^2 and j(x) = -x^2
Step-by-step explanation:
The higher the coefficient, the steeper the graph. So the ones that work have to be less than 2.
It can't be 3x^2 because 3 is greater than 2x^2.
It can't be -3x^2 because -3 is the same as 3 except on the other side of the graph, and 3 is greater than 2.
It can't be -2x^2 because it has equal steepness as 2x^2, except it's on the opposite side of the graph.
It is x^2 because 1 is less than 2 in 2x^2, so it's less steep.
It is -x^2 because -1 is the same as 1 except on the other side of the graph, and 1 is less than 2.
Hope this helps!
A function maps a given input to a single output, increasing the values of
the factors increases the output and steepness of the function.
The functions that have graphs that have graphs that are less steep than f(x) = 2·x² are; k(x) = x², and j(x) = -x²
Reasons:
The steeper the graph, the larger the ratio of the Rise to Run of the graph.
Therefore, increasing the multiple of the input of the graph increases the
Rise to Run ratio and therefore the steepness of the graph as follows;
Between points x = 1, and x = 2, for m(x) = 3·x², we have;
[tex]Slope = \dfrac{m(2) - m(1)}{2 - 1} = \dfrac{3 \times 2^2 -3 \times 1^2 }{2 - 1} = \dfrac{12 - 3}{2 - 1} = 9[/tex]
For k(x) = x², we have;
[tex]Slope = \dfrac{k(2) - k(1)}{2 - 1} = \dfrac{ 2^2 - 1^2 }{2 - 1} = \dfrac{4 - 1}{2 - 1} = 3[/tex]
Therefore;
The graphs of k(x) = x², and j(x) = -x², are less steep than f(x) = 2·x².
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please help on this one
The answer is D because it passes the horizontal line test.
Evaluate b – 2a – c for a = –3, b = 9, and c = –6.
b – 2a – c
9 - 2(-3) - (-6) = ?
9 - 2(-3) - (-6) = 21
How many square units are in an office that is 18 units by 8 units?
18x8 is 144
The answer is 144 units^Squared
I'm so confused please help
I'm confused too and I'm supposed to be an expert. I'm not entirely sure what frequency density is. We'll just treat this as a histogram.
Let's assume each five minute interval gives a value equal to or proportional to the number of people that finished in that interval.
From 0 to 50 we have 10 intervals; let's just make this into a table
0-5 0
5-10 40
10-15 40
15-20 30
20-25 30
25-30 25
30-35 25
35-40 25
40-45 25
45-50 15
From 0 to 40 that adds up to
0+40+40+30+30+25+25+25 = 215
From 0 to 50 that's
215+25+15 = 255
The fraction less than 40 is 215/255 = 43/51 ≈ .843
Answer: 84.3%
Answer:
84.3%
Step-by-step explanation:
Total frequency is the total area:
Add all the areas
To find each area:
Frequency density × class width
Total frequency:
40×10 + 30×10 + 25×20 + 15×5
= 1275
Less than 40:
Bar 1 + Bar 2 + some part of Bar 3
40×10 + 30×10 + 25×15
= 1075
Percentage (<40) = 1075/1275 × 100
= 4300/51
= 84.31372549%
Austin began a repiping job with 26 yards, 2 feet, 5 inches of pipe. When he finished the job, he had 13 yards, 2 feet, 7 inches. How much pipe did he use for the repiping job? Convert the answer to larger units whenever possible.
Answer:
He used 12.944... yards of pipe for the repiping job.
Step-by-step explanation:
We know that, 1 yard = 3 feet and 1 feet = 12 inches.
That means, 1 yard = (3×12) inches = 36 inches.
So, 1 feet = [tex]\frac{1}{3}[/tex] yard and 1 inch = [tex]\frac{1}{36}[/tex] yard.
Thus, 26 yards, 2 feet and 5 inches [tex]=(26+\frac{2}{3}+\frac{5}{36}) yards = 26.805... yards[/tex]
and 13 yards, 2 feet and 7 inches [tex]=(13+\frac{2}{3}+\frac{7}{36}) yards = 13.861... yards[/tex]
So Austin began a repiping job with 26.805... yards of pipe and when he finshed the job, he had 13.861... yards.
So, the length of the pipe he used for the repiping job will be: [tex](26.805...-13.861...) yards = 12.944... yards[/tex]
12 yards, 2 feet, 10 inches
What are the first four terms of the sequence shown below?
an = 2^n
A.
1, 2, 4, 8
B.
2, 4, 6, 8
C.
2, 4, 8, 16
D.
1, 8, 27, 256
[tex]a_n=2^n\\\\a_1=2^1=2\\\\a_2=2^2=4\\\\a_3=2^3=8\\\\a_4=2^4=16\\\\Answer:\ C.\ \{2,\ 4,\ 8,\ 16\}[/tex]
Nna is buying supplies to mail a gift to a friend who lives in California. First, she buys a shipping box for $4.95 and bubble wrap for $2.85. Then, she decides that she needs some shipping tape for $2.25 and a mailing label for $1.00. The postage to mail the gift is $8.32. In all, how much does it cost Anna for supplies and postage? A) $10.05 B) $11.05 C) $18.37 D) $19.37
Answer: D) $19.37
Step-by-step explanation: usatestprep approved
Find a common solution for the system of equations given below:
-1/4x+y=-2
-x+4y=-8
[tex]\left\{\begin{array}{ccc}-\dfrac{1}{4}x+y=-2&|\cdot4\\-x+4y=-8\end{array}\right\\\\\left\{\begin{array}{ccc}-x+4y=-8\\-x+4y=-8\end{array}\right\\\\-x+4y=-8\ \ \ \ |+x\\4y=x-8\ \ \ \ |:4\\y=\dfrac{1}{4}x+2\\\\\left\{\begin{array}{ccc}x\in\mathbb{R}\\\\y=\dfrac{1}{4}x+2\end{array}\right[/tex]
Imogen is baking a cake that requires two and one-half cups of sugar and three and one-sixth cups of flour. What are these amounts as improper fractions? A. 19?6 cups of sugar, 5?2 cups of flour B. 5?2 cups of sugar, 19?6 cups of flour C. 41?6 cups of sugar, 21?2 cups of flour D. 21?2 cups of sugar, 31?6 cups of flour
Answer:
Option B.
B. 5/2 cups of sugar, 19/6 cups of flour
Step-by-step explanation:
Given that Imogen is baking a cake.
The cake requires two and one-half cups of sugar and three and one-sixth cups of flour.
Sugar required = 2 1/2
To make it improper fraction, we make the integer as a fraction with denominator 2
i.e. 2 1/2 = 2+1/2 =4/2 +1/2
Now we can add these
= 5/2
So 5/2 cups of sugar is required.
Similarly flour required=3 1/6
To make it improper we convert 3 into a fraction with denominator 6.
3=18/6
3 1/6 = 3+1/6 =18/6+1/6 = 19/6
Hence 19/6 cups of flour required.
HELP!!
What is m∠PTS?
<PTS = <RTQ (vertical angles are equal)
11(y - 10) = 4y - 5
11y - 110 = 4y - 5
7y = 105
y = 15
so
<PTS = 11(15 - 10) = 11(5) = 55
Answer
<PTS = 55°
If (3,5) is a point on the graph of the function f, then which of the following points must be on the graph of the inverse function f (-1) ?
If (3,5) is a point on the graph of the function f, then (-1, 5) must be on the graph of the inverse function f-1.
To find the point that must be on the graph of the inverse function, we need to find the inverse of the given function first. Let's assume the given function is f(x) = y.
To find the inverse of f(x), we swap the x and y variables and solve for y. In this case, we have x = 3 and y = 5, so the inverse function is f-1(x) = (5, 3).
Therefore, the point (-1, 5) must be on the graph of the inverse function f-1.
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The following function represents an arithmetic sequence.
f(n)=4n−2
What is f(10)?
Enter your answer as a number, like this: 42/53
Which points are collinear with points A and B ?
The collinear points with A and B are:
- A, B, R
- B, D, T
- C, D, U
- B, S, G (where G is the centroid of AEDC).
In the given pyramid BAEDC, the collinear points with points A and B are determined by the midpoints and the line coming from B.
1. Midpoint of BA is R:
- Points A, B, and R are collinear.
2. Midpoint of BD is T:
- Points B, D, and T are collinear.
3. Midpoint of CD is U:
- Points C, D, and U are collinear.
4. Line coming from B meets at S, the midpoint of AEDC:
- Points A, E, D, C, and B are vertices of the pyramid, and S is the midpoint of the line segment connecting B to the centroid of the base AEDC.
- Therefore, points B, S, and the centroid (G) of AEDC are collinear.
In summary, the collinear points with A and B are:
- A, B, R
- B, D, T
- C, D, U
- B, S, G (where G is the centroid of AEDC).
Find the value of y.
Answer:
28
Step-by-step explanation:
Answer:
It is the 2 one sweetheart.
Step-by-step explanation:
Jay needs 19 quarts more paint for the outside of his barn than for the inside.If he uses 107 quarts in all,how many gallons of paint will be used to paint the inside of the barn?
A store owner buys cell phones for $40 and a mark up the price by 25% explain how to find the price at which she sells the cell phone
Write an equation of the line in point-slope form that passes through the two given points: (-17,8), (3,-2)
Answer:
y+2 = (-1/2)(x-3)
Step-by-step explanation:
Note that as we move from (-17,8) to (3,-2), x increases by 20 and y decreases by 10. Thus, the slope of this line is m = -10/20, or m = -1/2.
The standard equation in point-slope form is y - k = m(x - h), where (h, k) is a point on the line and m is the slope of the line. Then, taking data from the point (3, -2), we have
y+2 = (-1/2)(x-3).
Check: Does the point (-17,8) satisfy this equation? Is 8+2 = (-1/2)(-17-3) true?
Is 10 = 10 true? Yes.
Answer:
y+2 = (-1/2)(x-3)
Step-by-step explanation: