Answer:
-Convenience Sampling
Step-by-step explanation:
Convenience Sampling is a sampling method that is employed simply because the samples are easy to reach or access. It is a non-probability system of sampling and not a very strong method of sampling. For a serious research such as the one being conducted by the Superintendent, who has ample time to perform the research, this is not a very good sampling method. A Convenience style of research would mean that he can just walk into a cafeteria with students and administer the test to them.
Since he has detailed information of the students, he should choose any of the other mentioned sampling techniques in the options provided to randomly select the subjects. This would help to prevent bias, and enable him to make generalizations with the result of the research.
15m + (- 5m) combine like terms
Answer:
10 m
Step-by-step explanation:
15m - 5m = 10 m
both numbers have m which are alike
Answer: 10m
Step-by-step explanation: you subtract five from fifteen
Designer wants to create a whisper chamber in the shape of an ellipse. He has a warehouse space with a longest length of 30 feet which he decides will be the major axis of his elliptical chamber. He determines the best spots for his guest to stand to experience his whisper chamber will be 4 feet from the center of the warehouse space, which will act as the foci. How far out from the center along the minor axis should he built his whisper chamber.
Answer:
14.48 ft
Step-by-step explanation:
The relation between the location of the focus (c), the vertex on the major axis (a) and the vertex on the minor axis (b) with respect the center is:
b² = a² - c²
From the question:
c = 4 ft
a= 30/2 = 15 ft
Replacing into the equation:
b² = 15² - 4²
b = √209
b = 14.48 ft
So, he should build the whisper chamber at 14.48 ft out from the center along the minor axis
Answer: The answer to this questiojn is 14.48 feet, but if rounded to the nearest tenth, then it should be 14.5 (As it was on my question)
Please help me out with this!
third
hope it helps you
Answer: (6^-8/7^-12)
Step-by-step explanation:
In this type of problems, you apply the laws of indices which stated that
( a²/b²)³ =( a²×³/b²×³)
= ( a6/b6)
From this question now, applying the above principle
(6²/7³)-4
= (6²×-⁴/7³×-⁴)
= (6^-8/7^-12)
So the answer is C
The average daily sleep time for a domestic cat is 11.5 hours. What is this in hours and minutes?
b) An African lion sleeps 20% more than the cat. What is the sleep time of the African lion?
mathematics PLEASE HELP
Part A
1 hour = 60 minutes
0.5 hours = 30 minutes (multiply both sides by 0.5)
11.5 hours = 11 hours + 0.5 hours
11.5 hours = 11 hours + 30 minutes
11.5 hours = 11 hours, 30 minutes is the answer
========================================
Part B
20% = 20/100 = 0.20
The lion sleeps 20% more than the cat, which means the lion sleeps 0.20*11.5 = 2.3 hours more
This leads to 11.5 + 2.3 = 13.8 hours being the total time the lion sleeps
1 hour = 60 minutes
0.8 hours = 48 minutes (multiply both sides by 0.8)
13.8 hours = 13 hours + 0.8 hours
13.8 hours = 13 hours + 48 minutes
13.8 hours = 13 hours, 48 minutes is the amount of time the lion sleeps
Two functions represent the composite function h(x) = (x – 1)³ + 10 so that h(x) = (g compose f)(x). Given f(x) = x + a and g(x) = x³ + b, what values of a and b would make the composition true?
Answer:
a=-1
b=10
Step-by-step explanation:
Answer:
a: -1
b: 10
edge 2020
(23.0lb/gal)(2ft) report in correct number of significant figures and units
Answer:
344.1 Ib/ft²
Step-by-step explanation:
This has to do with conversion
23.0Ib/gal × 2ft
Step 1
First we convert 23.0lb/gal to Ib/ft³
1 Ib/gal = 7.48051948 Ib/ft³
23.0lb/gal = X Ib/ft³
Cross Multiply
1 Ib/gal × X Ib/ft³ = 23.0lb/gal × 7.48051948 Ib/ft³
X Ib/ft³ = 23.0lb/gal × 7.48051948 Ib/ft³/1 Ib/gal
X Ib/ft³ = 172.05194804 Ib/ft³ =
Step 2
Since 23.0lb/gal = 172.05194804 Ib/ft³
172.05194804 Ib/ft³ × 2 ft
= 344.10389608Ib/ft²
Approximately to 1 significant figure
= 344.1 Ib/ft²
Given: f(x) = X^2 - 3 and g(x) = X + 1 The composite function g°f is:_______.
Answer:
x² - 2
Step-by-step explanation:
To obtain (g ￮ f)(x), substitute x = f(x) into g(x), that is
g(x² - 3)
= x² - 3 + 1
= x² - 2
Answer:
✔ x² - 2
Step-by-step explanation:
EDG 2020
if you're currently making $6.75 per hour and you were offered a new job that pays $7.47 per hour, what will be your percent of increase in pay?
Answer:
10.67% increase
Step-by-step explanation:
We can find percent increase with (difference/original) x 100
7.47 - 6.75
= 0.72 (difference)
(0.72/6.75) x 100
= 10.67% increase
The number of students in a school's math club is ten less than twice the number of students in the art club. Let a represent the number of students in the art club. Write an expression for the number of students in the math club.
Answer: 2a - 10
Step-by-step explanation:
a represents the number of students in the art club.
The number of students in a school's math club is ten less than twice the number of students in the art club.
ten less = - 10
twice the number of students in the art club = 2*a
2a - 10 = the number of students in the math club
A number cube numbered 1-6 is rolled once. What is the probability that the side facing up shows a 4
Answer:
it will be one out six to roll a four
Step-by-step explanation:
there is one being rolled to be a 4 out of six
If you go on a road trip of 270 miles in the mountains and 7/10 of the trip is downhill, how many miles of the trip are not downhill? Reduce to the lowest terms.
Answer:Answer:
81 miles
Step-by-step explanation:
From the question 7/10 of the trip has been said to be downhill. It therefore means that 3/10 is not downhill.
Miles = 270
Downhill = 7/10
Not downhill = 3/10
Now we have To calculate Miles that are not downhill (uphill)
But first I calculated for the number of downhill miles
270x7/10
Downhill = 189 miles
To get the number of not downhill miles
I subtracted 189 from the total number of miles on the question.
270 - 189
= 81 Miles.
Therefore 81 Miles of the trip are not downhill.
If you have anymore questions or need clarity please let me know on the comment section. Thank you and Good luck!
Step-by-step explanation:
please help!! What is the solution to the quadratic inequality? 6x2≥10+11x
answers:
(−∞,−52]∪[23,∞)
(−∞,−23]∪[52,∞)
[−23,52]
[−32,14]
Answer:
The solution of the inequation [tex]6\cdot x^{2} \geq 10 + 11\cdot x[/tex] is [tex]\left(-\infty,-\frac{2}{3}\right]\cup\left[\frac{5}{2},+\infty\right)[/tex].
Step-by-step explanation:
First of all, let simplify and factorize the resulting polynomial:
[tex]6\cdot x^{2} \geq 10 + 11\cdot x[/tex]
[tex]6\cdot x^{2}-11\cdot x -10 \geq 0[/tex]
[tex]6\cdot \left(x^{2}-\frac{11}{6}\cdot x -\frac{10}{6} \right)\geq 0[/tex]
Roots are found by Quadratic Formula:
[tex]r_{1,2} = \frac{\left[-\left(-\frac{11}{6}\right)\pm \sqrt{\left(-\frac{11}{6} \right)^{2}-4\cdot (1)\cdot \left(-\frac{10}{6} \right)} \right]}{2\cdot (1)}[/tex]
[tex]r_{1} = \frac{5}{2}[/tex] and [tex]r_{2} = -\frac{2}{3}[/tex]
Then, the factorized form of the inequation is:
[tex]6\cdot \left(x-\frac{5}{2}\right)\cdot \left(x+\frac{2}{3} \right)\geq 0[/tex]
By Real Algebra, there are two condition that fulfill the inequation:
a) [tex]x-\frac{5}{2} \geq 0 \,\wedge\,x+\frac{2}{3}\geq 0[/tex]
[tex]x \geq \frac{5}{2}\,\wedge\,x \geq-\frac{2}{3}[/tex]
[tex]x \geq \frac{5}{2}[/tex]
b) [tex]x-\frac{5}{2} \leq 0 \,\wedge\,x+\frac{2}{3}\leq 0[/tex]
[tex]x \leq \frac{5}{2}\,\wedge\,x\leq-\frac{2}{3}[/tex]
[tex]x\leq -\frac{2}{3}[/tex]
The solution of the inequation [tex]6\cdot x^{2} \geq 10 + 11\cdot x[/tex] is [tex]\left(-\infty,-\frac{2}{3}\right]\cup\left[\frac{5}{2},+\infty\right)[/tex].
find the area of the blue shaded shape
Answer:
Hey there!
The big square has an area of 6x6 or 36 units.
However, we subtract 8 to get 28 because the 8 white squares do not count.
Let me know if this helps :)
Answer:
28units²
Step-by-step explanation:
6² = 36
36 - 8 = 28
Select the correct inequality to make a true statement
Please help
Answer:
2/5 is greater
Step-by-step explanation:
to compare you need to make them common denominator, and that could be10. to make both denominators equal to ten just multiply the top and bottom of 2/5 by 2. this will turn it into 4/10. 4/10 is greater than 3/10
The solution is : 2/5> 3/10
2/5 is greater than 3/10
What is fraction?A fraction represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters.
Here, we have,
the given fractions are,
2/5 and 3/10
now, we have,
to compare you need to make them common denominator,
and that could be10.
to make both denominators equal to ten just multiply the top and bottom of 2/5 by 2.
i.e. 2*2/5*2
=4/10
this will turn it into 4/10.
now, we get,
4/10 is greater than 3/10
Hence, 2/5> 3/10 , 2/5 is greater than 3/10.
To learn more on fraction click:
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PART 5 - Mathematical knowledge
What is the area of a parallelogram if its length is x +4 and its height is x +3?
A 4x + 14
B
2x + 7
C x2 + 12x + 7
D x2+ 7x + 12
Click the button or type the letter to the left of your answer
Determine the number and type of roots for the equation using one of the given roots. Then find each root. (inclusive of imaginary roots.) 1. x^3-7x+6=0;1 2. x^3-3x^2+25x+29=0;-1 3.x^3-4x^2-3x+18=0;3 Find all the zeros of the function 4. f(x)=x^2+4x-12 5.f(x)=x^3-3x^2+x+5 6. f(x)=x^3-4x^2-7x+10 Write the simplest polynomial function with integral coefficients that has the given zeros. 7. -5,-1,3,7 8. 4,2+3i (thank you so much in advance, it would mean a lot, and it is urgently needed, hence the high reward, thank you! Have a great day)
Step-by-step explanation:
"Determine the number and type of roots for the equation using one of the given roots. Then find each root. (inclusive of imaginary roots.)"
Given one of the roots, we can use either long division or grouping to factor each cubic equation into a binomial and a quadratic. I'll use grouping.
Then, we can either factor or use the quadratic equation to find the remaining two roots.
1. x³ − 7x + 6 = 0; 1
x³ − x − 6x + 6 = 0
x (x² − 1) − 6 (x − 1) = 0
x (x + 1) (x − 1) − 6 (x − 1) = 0
(x² + x − 6) (x − 1) = 0
(x + 3) (x − 2) (x − 1) = 0
The remaining two roots are both real: -3 and +2.
2. x³ − 3x² + 25x + 29 = 0; -1
x³ − 3x² + 25x + 29 = 0
x³ − 3x² − 4x + 29x + 29 = 0
x (x² − 3x − 4) + 29 (x + 1) = 0
x (x − 4) (x + 1) + 29 (x + 1) = 0
(x² − 4x + 29) (x + 1) = 0
x = [ 4 ± √(16 − 4(1)(29)) ] / 2
x = (4 ± 10i) / 2
x = 2 ± 5i
The remaining two roots are both imaginary: 2 − 5i and 2 + 5i.
3. x³ − 4x² − 3x + 18 = 0; 3
x³ − 4x² − 3x + 18 = 0
x³ − 4x² + 3x − 6x + 18 = 0
x (x² − 4x + 3) − 6 (x − 3) = 0
x (x − 1)(x − 3) − 6 (x − 3) = 0
(x² − x − 6) (x − 3) = 0
(x − 3) (x + 2) (x − 3) = 0
The remaining two roots are both real: -2 and +3.
"Find all the zeros of the function"
For quadratics, we can factor using either AC method or quadratic formula. For cubics, we can use the rational root test to check for possible rational roots.
4. f(x) = x² + 4x − 12
0 = (x + 6) (x − 2)
x = -6 or +2
5. f(x) = x³ − 3x² + x + 5
Possible rational roots: ±1/1, ±5/1
f(-1) = 0
-1 is a root, so use grouping to factor.
f(x) = x³ − 3x² − 4x + 5x + 5
f(x) = x (x² − 3x − 4) + 5 (x + 1)
f(x) = x (x − 4) (x + 1) + 5 (x + 1)
f(x) = (x² − 4x + 5) (x + 1)
x = [ 4 ± √(16 − 4(1)(5)) ] / 2
x = (4 ± 2i) / 2
x = 2 ± i
The three roots are x = -1, x = 2 − i, x = 2 + i.
6. f(x) = x³ − 4x² − 7x + 10
Possible rational roots: ±1/1, ±2/1, ±5/1, ±10/1
f(-2) = 0, f(1) = 0, f(5) = 0
The three roots are x = -2, x = 1, and x = 5.
"Write the simplest polynomial function with integral coefficients that has the given zeros."
A polynomial with roots a, b, c, is f(x) = (x − a) (x − b) (x − c). Remember that imaginary roots come in conjugate pairs.
7. -5, -1, 3, 7
f(x) = (x + 5) (x + 1) (x − 3) (x − 7)
f(x) = (x² + 6x + 5) (x² − 10x + 21)
f(x) = x² (x² − 10x + 21) + 6x (x² − 10x + 21) + 5 (x² − 10x + 21)
f(x) = x⁴ − 10x³ + 21x² + 6x³ − 60x² + 126x + 5x² − 50x + 105
f(x) = x⁴ − 4x³ − 34x² + 76x − 50x + 105
8. 4, 2+3i
If 2 + 3i is a root, then 2 − 3i is also a root.
f(x) = (x − 4) (x − (2+3i)) (x − (2−3i))
f(x) = (x − 4) (x² − (2+3i) x − (2−3i) x + (2+3i)(2−3i))
f(x) = (x − 4) (x² − (2+3i+2−3i) x + (4+9))
f(x) = (x − 4) (x² − 4x + 13)
f(x) = x (x² − 4x + 13) − 4 (x² − 4x + 13)
f(x) = x³ − 4x² + 13x − 4x² + 16x − 52
f(x) = x³ − 8x² + 29x − 52
Which expression is equivalent to 10i/2-i
Answer:
A reduce the fraction is
5\1
Answer:
C. 4i-2
Step-by-step explanation:
EDGE 2020
PLS ANSWER BEST ANSWER GETS BRAINLIEST Tim wants to decorate a rectangular card with a width of 1/2 inch and an area of 7/4 square inches. Find the length of the card in inches?
Answer:
[tex]\frac{7}{2}[/tex]in
Step-by-step explanation:
First you must set up an equation. [tex]\frac{1}{2}x=\frac{7}{4}[/tex]
Then, you must solve for x. [tex]x=\frac{7}{2}[/tex]
Solve xy - 3 = k solve for x
Answer:
x=(k+3)/y
Step-by-step explanation
First, we simplify by adding 3 to both sides of the equation
xy-3+3=k+3
Now it's xy=k+3
To get x we divide both sides by y
So x=(k+3)/y
Answer:
[tex]x = \frac{k + 3}{y} [/tex]
Step-by-step explanation:
Do all u can to make x stand alone.
Just obey the rules of fhe operations when they cross the equal sign.
can someone please help me with this question :)
The ABC company's brand has a market share of 30%. Suppose that in a survey, 800 consumers of the product are asked which brand they prefer. What is the probability that more than 32% of the respondents say they prefer ABC's brand?
Answer: 0.68
Step-by-step explanation:
given data:
ABC market share = 30%
number of customers surveyed = 800
probability that more than 32% prefers ABC
Solution:
32% of 800
= 256 persons
p ( x ≥ 256 )
= 1 - ( 256/800 )
= 1 - 0.32
= 0.68
the probabiliy that more than 32% of those who carried out the survey would prefer ABC brand is 0.68.
What is two plus two?
Answer:
4 you dumba**. Jesus christ
Step-by-step explanation:
Subtract 5 - 4i from 19 - 3i.
Answer:
Step-by-step explanation:
19 - 3i - 5 + 4i
14 + i
Match each fraction with its percent equivalent.
1/5 9/10 21/25 3/4 75% 84% 90% 20%
how to do this problem
−2(3x−2)+3x+3=34
Answer:
answer is -3
Step-by-step explanation:
-6x+4+3x+3=34
-3x+7=34
-3x=34-7
-3x=27
x=27/-3
x=-3
It is estimated that 65.5% of the students at Foster Middle School will attend the benchmark reward party. Which number is NOT equivalent to 65.5%
Answer:
I am not totally sure but the answer might be 0.0655.
Find the radius of a sphere with a volume of 456cm^3
(show work)
Answer:
r≈4.775
Step-by-step explanation:
the formula for this is: r=(3V /4π)^⅓
Linda had 72 fliers to post around town. Last week, she posted 1/3
of them. This week, she posted 1/4 of the remaining fliers. How many fliers has she still not
posted?
Answer:
36 fliers
Step-by-step explanation:
1/3*72 = 24 fliers posted last week (.333*72)
72-24 = 48 fliers left
1/4*48 = 12 fliers posted this week (.25*48)
48-12= 36 fliers not posted
Linda has 36 fliers left to post.
What is the unitary method?The unitary method is a method in which you find the value of a unit and then the value of a required number of units.
Given: Linda had 72 fliers to post around town. Last week, she posted 1/3
of them. This week, she posted 1/4 of the remaining fliers.
1st-week Linda posted 72/3=24 and remaining fliers72-24=48
2nd the week Linda posted 48/4=12 and remaining fliers 48-12=36
∴The remaining fliers left to be posted are 36
Hence, Linda has 36 fliers left to post.
Learn more about the unitary method here:
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x + 2y = 33
x-y = 11
Answer:
[tex]x=\frac{55}{3},\:y=\frac{22}{3}[/tex]
Step-by-step explanation:
Solve by Substitution ;
[tex]\begin{bmatrix}x+2y=33\\ x-y=11\end{bmatrix}\\\\\mathrm{Isolate}\:x\:\mathrm{for}\:x+2y=33:\quad x=33-2y\\\\\mathrm{Subsititute\:}x=33-2y\\\\\begin{bmatrix}33-2y-y=11\end{bmatrix}\\\\Simplify\\\begin{bmatrix}33-3y=11\end{bmatrix}\\\\\mathrm{Isolate}\:y\:\mathrm{for}\:33-3y=11:\quad y=\frac{22}{3}\\\mathrm{For\:}x=33-2y\\\\\mathrm{Subsititute\:}y=\frac{22}{3}\\x=33-2\times\frac{22}{3}\\\\x=\frac{55}{3}\\\\x=\frac{55}{3},\:y=\frac{22}{3}[/tex]
Need the answer ASAP
Answer:
Approximately 201 squared inches.
Step-by-step explanation:
So, the composite figure is made up of a square and a semi-circle. The square has side lengths of 12 and the semi-circle has a radius of 6.
The total area of the figure would be the area of the square plus the area of the semi-circle. Thus, find the area of each individual figure.
Square:
The area of a square is given by:
[tex]A=l^2[/tex]
Where l is the side length.
Substitute 12 for l:
[tex]A=(12)^2\\A=144\text{ in}^2[/tex]
So the square is 144 square inches.
Semi-circle:
The area of a semi-circle is given by:
[tex]A=\frac{1}{2}\pi r^2[/tex]
Substitute 6 for r and 3.14 for π:
[tex]A=\frac{1}{2}(3.14)(6)^2\\ A=56.52[/tex]
Therefore, the total area is:
[tex]TA=144+56.52\\TA=200.52\text{ in}^2\approx201\text{ in}^2[/tex]