Answer:
The correct answer is the last on that’s states: it is not a valid sample because it is not a random sample of the population.
Step-by-step explanation:
When a researcher wants to know about the same thing, he/she has to take a sample from the population.
Example, consider a researcher wants to know how many hours the students study at home in a week, so the researcher has to take the sample from the student population.
Here, he/she gives the advertisement and offers $10 for 10 people. Therefore for anyone can come they might not required for a particular study.
Therefore, the answer is the last one.
Answer:
d
Step-by-step explanation:
I need help with this ' ASAP!
Answer:
H. 120
Step-by-step explanation:
find the measurement of the angle
Answer:
∠ 1 = 120°
Step-by-step explanation:
Note that ∠ Q and ∠ R are congruent, that is both 30°, thus
∠ 1 = 180° - (30 + 30)° = 180° - 60° = 120°
Which function is equivalent to f(x) = -4(x + 7)2 – 6?
A. f(x) = -4x2 – 56x - 202
B. f(x) = -4x2 + 14x + 43
C. f(x) = --4x2 - 56x - 172
D. f(x) = -4x2 + 190
Answer:
A
Step-by-step explanation:
Given
f(x) = - 4(x + 7)² - 6 ← expand factor using FOIL
= - 4(x² + 14x + 49) - 6 ← distribute parenthesis by - 4
= - 4x² - 56x - 196 - 6 ← collect like terms
= - 4x² - 56x - 202 → A
The equivalent function is [tex]f(x)=-4x^{2} -56x-202[/tex]
Option A is correct.
Equivalent function :The given function is,
[tex]f(x)=-4(x+7)^{2}-6[/tex]
We have to expand above function.
[tex]f(x)=-4(x+7)^{2}-6\\\\f(x)=-4(x^{2} +14x+49)-6\\\\f(x)=-4x^{2} -56x-196-6\\\\f(x)=-4x^{2} -56x-202[/tex]
Thus, the equivalent function is [tex]f(x)=-4x^{2} -56x-202[/tex]
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The bar of the square pyramid shown has and area of 576 units. If the slant height of the pyramid is 29 units, what is the height of the pyramid?
Answer:
[tex]\sqrt{697}[/tex]
Step-by-step explanation:
If the base of the square pyramid has an area of 576 units, then the side length must have a length of [tex]\sqrt{576}=24[/tex]. 24/2=12, and using the pythagorean theorem you can find that the height of the pyramid is [tex]\sqrt{29^2-12^2}=\sqrt{697}[/tex]. Hope this helps!
If sin = O =5/6, what are the values of cos O and tan O? (2 points)
Answer:
[tex]cos(\alpha )=\frac{\sqrt{11} }{6}[/tex] and [tex]tan(\alpha )=\frac{5\sqrt{11} }{11}[/tex]
Step-by-step explanation:
First we would need to solve for the missing leg in order to figure out the remaining answers.
To do this we can use the Pythagorean Theorem a² + b² = c²
Our missing leg in this case is a, so solving for a gives us [tex]a=\sqrt{c^{2} -b^{2} }[/tex]
Here our b is 5 and our c is 6. So plugging in these values we get [tex]a=\sqrt{(6)^{2}-(5)^{2} } =\sqrt{36-25} =\sqrt{11}[/tex]
With this missing leg being solved, we can use trig identities to solve for cos and tan
I used the trig identity [tex]sin(\alpha )=\frac{opposite}{hypotenuse}[/tex] to set up the triangle in the attached image. We can use the trig identity [tex]cos(\alpha)=\frac{adjacent}{hypotenuse}[/tex] which would give us [tex]cos(\alpha )=\frac{\sqrt{11} }{6}[/tex] and we can use the trig identity [tex]tan(\alpha ) = \frac{opposite}{adjacent}[/tex] which would give us [tex]tan(\alpha )=\frac{5}{\sqrt{11} } =\frac{5\sqrt{11} }{11}[/tex]
Answer:
As trigonometry property:
(sinO)^2 + (cosO)^2 = 1
tanO = sinO/cosO
Then, if sinO = 5/6 = 0.83
=> (5/6)^2 + (cosO)^2 = 1
=> cosO = +/- sqrt(1 - (5/6)^2) = +/- 0.55
=>tanO = +/- 0.83/0.55 = +/- 1.51
Hope this helps!
:)
The total cost C (in dollars) to rent a 14-foot by 20-foot canopy for d days is given
by the function C(d) = 15d + 30, where the setup fee is $30 and the charge per
day is $15. The setup fee increases by $20. The new total cost T is given by the
function T(d) = C(d) + 20. Describe the transformation from the graph of C to
the graph of T.
hi i think its 2 because 15 times 2 is 30
The graph of a linear function C(d) will shift 20 units left side if the total cost C (in dollars) to rent a 14-foot by 20-foot canopy for d days is function C(d) = 15d + 30.
What is a function?It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
It is given that:
The total cost C (in dollars) to rent a 14-foot by 20-foot canopy for d days is given by the function:
C(d) = 15d + 30
The charge per day is $15. The setup fee increases by $20.
The new total cost T is given by the function
T(d) = C(d) + 20
Plug C(d) = 15d + 30 in the above function:
T(d) = 15d + 30 + 20
T(d) = 15d + 50
The graph of a linear function C(d) will shift 20 units left side.
Thus, the graph of a linear function C(d) will shift 20 units left side if the total cost C (in dollars) to rent a 14-foot by 20-foot canopy for d days is function C(d) = 15d + 30.
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Can someone check to see if this is correct?
Answer:
yes
Step-by-step explanation:
Answer:
yes it is correct good job
Step-by-step explanation:
Determine the intercepts of the line
Brooklyn is starting a running plan to train for a race . In the first week of her running plan , Brooklyn will run 8 miles . The plan calls for Brooklyn to increase her weekly mileage by 1.5 miles every week . If Brooklyn sticks to the plan , how many miles would she be expected to run during her 19th week of training plan ?
Answer:
36.5 miles
Step-by-step explanation:
Answer:
write out the first three terms (ex. the first term was 8 miles for the first week)
find out the arithmetic sequence or d. (d= 1.5)
plug into explicit formula.
answer: 35
Miguel will study for the quiz on which he is likely to do worse by guessing.
Which quiz should he study for?
A. History, because he must get more questions correct.
B. Science, because the probability of getting all questions correct is
0.016, which is lower than for history (0.031).
C. History, because the probability of getting all questions correct is
0.031, which is lower than for science (0.75).
D. Science, because the probability of getting all questions correct is
0.075, which is lower than for history (0.25).
Answer:
B: Science
Step-by-step explanation:
The reason B is correct is because 0.016 is lower than all the other possibility. A has no math to compare, but the others do, making it easier to determine the correct answer.
I hope this helps. If you have any more questions, please feel free to post them and someone will be able to help you, whether it's myself or others. Please leave a like, rating, and if possible, Brainliest. Have a great day!
Answer:c
Step-by-step explanation:
here is some info about the goals scored in a hockey game. (math problem)
a. The mode for away goals is the 2nd quarter.
b. The mean number of goals per game is 4.8.
c. There were 4 more home goals scored than away goals in total across 10 games, with a total of 26 home goals and 22 away goals.
a. To find the mode for away goals, we need to determine which quarter had the most frequent number of away goals. Let's count the away goals for each quarter:
1st quarter: 2 away goals
2nd quarter: 9 away goals
3rd quarter: 7 away goals
4th quarter: 4 away goals
The 2nd quarter has the highest number of away goals, so the mode for away goals is the 2nd quarter.
b. To find the mean number of goals per game, we'll sum the total number of goals and then divide by the number of games:
Total number of goals = (5 + 4 + 8 + 9) + (2 + 9 + 7 + 4) = 48 goals
Number of games = 10
Mean number of goals per game = Total number of goals / Number of games = 48 goals / 10 games = 4.8 goals per game.
c. To find how many more home goals were scored than away goals in total, we'll calculate the difference in the total number of home goals and away goals:
Total home goals = 5 + 4 + 8 + 9 = 26 goals
Total away goals = 2 + 9 + 7 + 4 = 22 goals
Difference = Total home goals - Total away goals = 26 goals - 22 goals = 4 goals
In total, 4 more home goals were scored than away goals.
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What percent is equivalent to the fraction 4/5?
Answer:
80/100 or 80%
Step-by-step explanation:
Amanda's employer deducts $350 from her paycheck each month for her family's health insurance plan. Jer gross monthly salary is $4,500. What percent of her gross pay goes towards health insurance?
Answer: about 7 %
Step-by-step explanation: you take 350 and divide it by 4500
Answer:
hope it helps
Step-by-step explanation:
True or False: If a pair of lines is not parallel, it must be perpendicular.
Answer:
False
Step-by-step explanation:
Parallel lines are lines that never intersect. If the line changes slightly, the lines will intersect. This doesn't mean that it's perpendicular
Perpendicular lines are lines that intersect in such a way that the lines form 90 degree angles.
The statement is false. Non-parallel lines are not necessarily perpendicular; they can intersect at any angle other than right angles.
The statement 'If a pair of lines is not parallel, it must be perpendicular' is False. Not all non-parallel lines are perpendicular. Perpendicular lines are a specific case of non-parallel lines where they meet at right angles (90 degrees). Non-parallel lines that are not perpendicular to each other may intersect at any other angle, which could be acute or obtuse but not 90 degrees.
Theorem 10 supports this by stating that 'If two lines cut a third at the same angle, that is, so that corresponding angles are equal, a line can be drawn that is perpendicular to both'. Theorem 14 also relates as it informs 'If a line is perpendicular to two intersecting lines at their intersection, it is perpendicular to all lines of their plane passing through this point'. However, non-parallel lines that do not satisfy these conditions are simply intersecting lines at some angle other than 90 degrees.
Mrs. Smith has 4 pounds of cat food. Her son gave her 5 more pounds. She feeds her cats 3/4 of a pound per day. How many days will Mrs. Smith be able to feed her cats with the cat food she has now? Group of answer choices 27 days 15 days 12 days 9 days
Answer:
12 days
Step-by-step explanation:
So 4 + 5 is 9. Then you divide 9 by 0.75 since that is equivalent to 3/4 and get 12.
Convert this decimal into a percentage: 1.125
Answer:
112.5 percent
Step-by-step explanation:
Answer:
112.5%
Step-by-step explanation:
Look at answer
If x = 4 and y = 6 , evaluate the following expression:
20+2(3y-4x)
By applying the PEMDAS rule, the solution to the given expression is equal to 24.
How to evaluate and solve the given expression?In order to evaluate and solve this expression, we would have to apply the PEMDAS rule, where mathematical operations within the parenthesis (grouping symbols) are first of all evaluated, followed by exponent, and then multiplication or division from the left side of the equation to the right.
Lastly, the mathematical operations of addition or subtraction would be performed from left to right.
Based on the information provided, we have the following mathematical expression:
20 + 2(3y - 4x)
20 + 2(3(6) - 4(4))
20 + 2(18 - 16)
20 + 2(2)
20 + 4 = 24
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please help these are my last of points
The Correct answer would be B
I hope this was helpful :P
STAY SAFE!! :)
Please help will give brainliest!!! I need help ASAP
Answer:
Area = 54.1 ft²
Perimeter = 25.5 ft
Step-by-step explanation:
Area:
The formula for the area of a circle is (A = πr²). The radius is r, and r is half of the diameter, or d. So, it would be:
A = (3)(4.25)²
A = (3)18.0625
A = 54.1
Perimeter:
The perimeter, of circumference, formula for a circle is (C = πd), where C is the circumference and d is the diameter.
C = (3)(8.5)
C = 25.5
Hope this helps! Sorry it is a bit late! Have a great day! :)
John has an account balance of -$30.00 and Steve has an account balance of
-$50.00. Who has more debt?
A. Steve
B. John
Answer:
A. Steve
Step-by-step explanation:
Steve has to pay $50. So he has more debt than John
In the diagram below, XY and YZ are tangent to O. What is the measure of XZ?
The measure of arc xz is 106 degrees.
What is Major and Minor Arc ?A small arc is one with a measure of fewer than 180 degrees. A major arc is one with a measure greater than 180 degrees. A semicircle is an arc that divides a circle in half and has a measure of 180 degrees.
An arc is a continuous segment of a circle. There are two sections, one of which is larger than the other. The major arc is the larger one, and the minor arc is the smaller one.
Given:
From diagram, m ∠xz = 254 degrees.
We know that whole circle = 360 degrees
So, measure of arc XZ = 360 - 254
= 106
Hence, the measure of arc xz is 106 degrees.
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I will give the first answer brainiest :)
Answer:
A=2
Step-by-step explanation:
in the figure, parabola cuts the graph at point (2,1)
point (2,1) is one of the solution of the given quadratic equation
Hence, we can find the value of a by putting the value of x and y, we get
1=a(2-3)^2-1
= 2=a
Which is why A is 2
Answer:
Isolate the variable by dividing each side by factors that don't contain the variable.
Step-by-step explanation:
a=[tex]\frac{y}{(x-3^)^{2} } + \frac{1}{(x-3)^{2} }[/tex]
Dorian has two bags. Each bag has the letters A, B, and C written on little pieces of paper inside of it. He draws one letter from each bag. What is the probability that he draws out a vowel and a consonant? A. B. C. D.
What is the volume of the triangular prism?
A) 57.75 m3
B) 115.5 m3
C) 231.0 m3
D) 462.0 m3
Answer:
B) [tex]115.5m^3[/tex]
Step-by-step explanation:
to find the volume we need to find first the area of the triangle, and then multiply by 11 which is the length of the prism:
the measurements are:
[tex]base=7m[/tex]
[tex]height=3m[/tex]
[tex]length=11m[/tex]
the area of the triangle in one side is:
[tex]triangle=\frac{(base)(height)}{2} \\triangle=\frac{(7m)(3m)}{2}\\ triangle=\frac{21m}{2}\\ triangle=10.5m^2[/tex]
and now to find the volume of the prism we multiply the area of the triangle by the length of the prism:
[tex]volume=(triangle)(height)\\volume=(10.5m^2)(11m)\\volume=115.5m^3[/tex]
which is option B)
Answer:
115.5 [tex]m^{3}[/tex]
Step-by-step explanation:
V = 1/2a·c·h
V = 1/2(3)(7)(11) = 115.5
find the valu of x.
Answer:
Easy! X is going to be 58° degree's as well, because of the Vertical Angles Theorem!
Answer:
58 degrees
Step-by-step explanation:
It is symmetrical to the other side, which is 58 degrees.
im not verry good at these can you help me please
Answer:
It is A
Step-by-step explanation:
A because, you multiply -2 on both sides on the side with the x it cancels out on the one with the 5 it turns into -10 so the answer would be A
The graph shows point F located at (0, 6) and line d given by the equation y = 0.
Drag each coordinate pair into a box to show whether that point is equidistant or not equidistant from point F and line d, or if equal distance cannot be determined.
Answer:
equidistant from point F and line d: (0, 3); (6, 6) and (-6, 6)
not equidistant from point F and line d: (3, 0); (3, 5) and (-2, 2)
Step-by-step explanation:
Point (0, 3)
Distance from point (0, 6) = 3
Distance from line d = 3
Point (6, 6)
Distance from point (0, 6) = 6
Distance from line d = 6
Point (3, 0)
Distance from point (0, 6) = √[(3 - 0)² + (0 - 6)²] = √45
Distance from line d = 0
Point (3, 5)
Distance from point (0, 6) = √[(3 - 0)² + (5 - 6)²] = √10
Distance from line d = 5
Point (-2, 2)
Distance from point (0, 6) = √[(-2 - 0)² + (2 - 6)²] = √20
Distance from line d = 2
Point (-6, 6)
Distance from point (0, 6) = 6
Distance from line d = 6
for each number below, is it even or odd?
Answer:
2,4,6,8,10 is even, 1,3,5,7,9 is odd. 983 is odd, 347 is odd, 36 is even, 44 is even
Step-by-step explanation:
if (one) yard is equal to 3 (three) feet, convert 7 yards to feet
Answer:
21 feet
Step-by-step explanation:
7*3=21
I wish you luck :)
Mrs. Turner baked 120 cookies. She decided to give 1/6 of them to her students. How many did she take to her students?
Answer:
20
Step-by-step explanation:
120÷6=20