Answer:
So, David's guitar class is located at point (-6,2) on the coordinate grid.
Step-by-step explanation:
David starts from school, which is two units to the right and four units down from the origin. This location is indicated by the point (2,-4).
He walks 5 units west to the library.
So, find the point that is 5 units to the west of point (2,-4). Distances east and west on the grid represent a change in the x-coordinate. Moving 5 units to the west on the grid from point (2,-4) places the new location at point (-3,-4).
He then walks 6 units north to the gym.
So, find the point that is 6 units to the north of point (-3,-4). Distances north and south on the grid represent a change in the y-coordinate. Moving 6 units to the north on the grid from point (-3,-4) places the new location at point (-3,2).
David then walks 3 units west to his guitar class.
So, find the point that is 3 units to the west of point (-3,2). Moving 3 units to the west on the grid from point (-3,2) places the new location at point (-6,2).
A dentist conducts a survey to determine whether a certain brand of mouthwash improves gum health more than others. When his patients come in for their regular cleanings, the dentist surveys them about their mouthwash use and makes a conclusion based on the survey results. The conclusion drawn from the study is because the sample is . In this instance, an study was conducted.
Answer: The conclusion drawn from the study is *invalid* because the sample is *biased*. In this instance, an *inappropriate* study was concluded.
Answer:
The conclusion drawn from the study is NOT VALID because the sample is BIASED. In this instance, an INAPPROPRIATE study was conducted.
Please mark me brainliest, I really need it.
Help?? Please please
Answer:
................................
Answer:
23
Solving steps
We know x= -10-15y, so we can subtract it to the equation above
x = -10-15y
2x+5y=35
2(-10-15y) + 5y = 35
(Refer to the 1st image to solve for y)
Y = -11/5
We now know y= -11/5, so we can subtract it to the equation for x.
Y = -11/5
x = -10-15y
x = -10-15(-11/5)
(Refer to the 2nd and 3rd image to solve for x) (Make sure to look at both images first before writing something down)
x = 33 - 10
x = 23
Hopefully, everything was clear and concise. Please comment if you have any questions.
The heights of young American women, in inches, are approximately Normally distributed with mean μ and standard deviation σ = 2.4. If I want to construct a 99% confidence interval with a margin of error of no more than ± 1 inch, what is the smallest sample I can select?
The smallest sample size needed to construct a 99% confidence interval with a margin of error of no more than ±1 inch is 39.
The margin of error (E) for a confidence interval is described as:
E = z × (σ / √n)
where:
E is the desired margin of error
z is the z-score corresponding to the desired confidence level (in this case, 99% confidence level)
σ is the population standard deviation
n is the sample size
In this case, the margin of error is no more than ±1 inch, so E = 1 inch.
Now, determine the z-score corresponding to a 99% confidence level using a standard normal distribution table or statistical software.
For a 99% confidence level, the z-score is approximately 2.576.
Plugging in the known values into the margin of error formula,
1 = 2.576 × (2.4 / √n)
To solve for n, rearrange the formula as follows:
√n = (2.576 × 2.4) / 1
√n = 6.1824
n = (6.1824)²
n ≈ 38.16
Therefore, the smallest sample size needed to construct a 99% confidence interval with a margin of error of no more than ±1 inch is 39.
To learn more about the confidence interval;
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what's a good online graph maker?
Answer:
desmos
Step-by-step explanation:
Answer:
GeoGebra Classic its a little complacated but it works really well
Step-by-step explanation:
10 tacos and 6 drinks cost $19.50. 7 tacos and 5 drinks cost $14.25. If t is the cost of one taco and d is the cost of one drink, which of the following systems of equations represents this situation?
Answer:
Step-by-step explanation:
You haven't listed any choices.
10t + 6d = 19.50
7t + 5d = 14.25
To make 3 dinner rolls, 3/4 cup of flour is used. How many rolls can you make with 2 1/2 cups of flour?
Answer: I can make 10 rolls with 2 1/2 cups of flour
Step-by-step explanation:
3/4 cup of flour can makes 3 Dinner rolls
Therefore 2 1/2 cups of flour will make
=2 1/2 x 3) / (3/4)
(5/2 x 3 ) / ( 3/4)
(15/2) /(3/4)
7.5/ 0.75 = 10 rolls
Find the perimeter of the polygon.
5 cm
6 cm
6 cm
8 cm
a.
25 cm
b. 20 cm
c.
30 cm
d. 28 cm
Answer:
The answer is A: 25 cm
Step-by-step explanation:
5+6+6+8=25
Find the ten missing angles labeled in the diagram. Line a is parallel to line b. The measures of two angles are given.
Answer:
m∠3 = 112° m∠5 = 38° m∠6 = 68° m∠8 = 74°
You do the others
Step-by-step explanation:
Facts you need to solve this problem.
1. Vertical angles are congruent
2. Alternate interior angles are congruent when lines are parallel
3. Sum of the measures of the angles of a triangle is 180
4. Adjacent angles are supplementary when two lines intersect
m∠3 = 112° (Reason 1 above)
m∠6 = 180 - 112 = 68° (Reason 4)
m∠6 + m∠5 + 74 = 180° (Reason 3)
68 + m∠5 + 74 = 180
142 + m∠5 = 180
m∠5 = 38°
m∠8 = 74° (Reason 2)
That gives you a start, so I will let you find all the others. OK? I know you don't want to do that, but you need to be able to do this type of problem. Now, go for it!!
A sports memorabilia collector needs to create a display case to show her baseball cards
at a garage sale. She will create the case in the shape of a rectangular prism with no lid.
The box will be created by cutting square corners out of a piece of cardboard with
dimensions 40 inches by 60 inches. What equation should be used to maximize the
volume of the box?
Answer:
For a box of length L, width W, and height H, the volume is:
V = H*L*W
in this case, we have a piece of cardboard of dimensions 40in by 60 in.
If we cut squares of side length X in the corners and we fold the corners, we will have a height of X.
And we can define:
Length = 60in - X
Width = 40 in - X
Then the volume of the box will be:
V = X*(60in - X)*(40in - X)
V = X^3 - 100in*X^2 + 2400in^2*X
We want to maximize this, then we need to find the zero of the first derivative.
We have that:
V' = 3*X^2 - 2*100in*X + 2400in^2
V' = 3*X^2 - 200in*X + 2400in^2
This is the equation we will use to maximize the volume of the box, but let's not end here, let's complete the problem and find the value of X and the maximum volume.
We want to solve:
V' = 0 = 3*X^2 - 200in*X + 2400in^2
For X.
Then we can use Bhaskara's formula, we will get that the solutions are:
[tex]X = \frac{-(-200in) +-\sqrt{(-200in)^2 - 4*3*(2400in)} }{2*3} = \frac{200in +- 105.8in}{6}[/tex]
Then we have two possible solutions for X.
X = (200in + 105.8in)/6 = 50.97 in
But this is larger than the side of 40 in, so we can not cut this much, we can discard this option.
The other one is:
X = (200in - 105.8in)/3 = 15.7in
This seems correct.
Then the maximum volume of the box is:
V = 15.7in*(60in - 15.7in)*(40in - 15.7in) = 16,900.893 in^3
evaluate x2 when x=-2
Answer:
-4
Step-by-step explanation:
x2 is x*2.
If x=-2, then the equation would be -2*2 which is -4.
Answer:
-4
Step-by-step explanation:
x2 when x=-2
-2 (2)
-2 · 2
-4
The points and line on a line
Find TWO more points that line on this line.
Answer:
picture please??????????
The volume of a cylinder with radius r and height his v = 7h
A barrel in the shape of a circular cylinder is 30 inches in diameter and 42 inches tall.
Approximately what is the volume of the barrel in gallons?
(Use 1 gal - 231 in)
Answer: 128.5 gallons
Step-by-step explanation:
V= πr²h
V=π15²42
V= 29688.05058in³ ÷ 231 ≈ 128.5 gallons
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PLEASE HELP- URGENT
3. A bicycle wheel has a diameter of 559 mm and has 32 equally spaced spokes. What is the approximate arc length, rounded to the nearest hundredth, between each spoke? Use 3.14 for (pi) . SHOW YOUR WORK!
If you show work along with correct answer, I will give brainliest.. PLEASE HELP
9514 1404 393
Answer:
54.85 mm
Step-by-step explanation:
The circumference of the wheel is given by ...
C = πd
C = (3.14)(559 mm) = 1755.26 mm
When this is divided into 32 equal arcs, each one of them is ...
(1755.26 mm)/32 = 54.851875 mm
Rounded to the nearest hundredth, the arc length is 54.85 mm.
Using the Distance Formula to find the distance between the two points.
A (-3,4) B (1,3)
Select the correct answer.
Complete the following analogy with the word that best suits the pattern.
Friendly is to outgoing as biting is to ?
Friendly is to outgoing as biting is to inclusiveness or imitatin
An analogy is a means of comparing one word with another word with the aim of clarification. These words can be either anonymous or synoymous depending on the sentence.Based on the given sentence, we are given the analogy that Friendly is to outgoing shows that friendy people are outgoing (synonymous).
We are to get the equivalent of the word biting. Biting can mean to imitate or to copy.
Hence based on the option we can infer that biting is to inclusiveness
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Answer: Friendly is to outgoing as biting is to _____.
nuanced
inclinational
incisive
denounce
Step-by-step explanation:
incisive is the answer edmentum
Simplify -4(x + 1) + 6x. Write your answer in factored form.
Answer:
hope this helps
2x-4
Step-by-step explanation:
EFGH is translated 6 units to the left and 3 units up.
What are the coordinates of F’ ?
A. F’(6,-6)
B. F’(3,-9)
C. F’(-6,-6)
D. F’(-6,0)
Answer:
-6,0
Step-by-step explanation:
i just had this question
A translation is a transformation that moves every point in a figure in the same direction by the same amount. The coordinates of F' is (-6, 0).
What is translation?A translation is a transformation that moves every point in a figure in the same direction by the same amount. It is also a sort of transformation in which each point in a figure is moved the same distance in the same direction resulting in the same figure again.
Since the transformation can be defined as the introduction of a new set of mathematical coordinates that are declared to be different functions of the original coordinates.
Given a parallelogram EFGH that is been translated 6 units to the left and 3 units up.
Since the coordinates of F' is (0, -3). Therefore, the coordinates of F’ can be written as,
F = (0, -3)
F' = (0 - 6, -3 + 3)
F' = (-6, 0)
Hence, the coordinates of F' is (-6, 0).
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Plz help me, im stuck on this question, It says
Find the perimeter of the following rectangle,
Write your answer as a mixed number in simplist form,
Be sure to include the correct unit in your answer.
[tex]perimeter = 2(3 \frac{1}{10}) + 2 (\frac{3}{4}) [/tex]
[tex]perimeter = \frac{31}{5} + \frac{3}{2} [/tex]
[tex]perimeter = \frac{62}{10} + \frac{15}{10} [/tex]
[tex]perimeter = \frac{77}{10} [/tex]
[tex]perimeter = 7 \frac{7}{10} [/tex]
The unit is just cm.
//
I might not be right. Double check to make sure. Hope that gives you a general idea of how to do it.
Answer:
Perimeter of rectangle =2(l+b)
=2(3*1/10+3/4)
=2(3/10+3/4) (lcm=40)
=2(12/40+30/40)
=2(42/40)
=42/20
= 21/10
=21/10 cm
What transformations are applied to the graph of the function f(x) = 10^x to produce the graph of the function g(x) = 3(10)^x - 2 ?
A.
a vertical dilation by a factor of and a horizontal shift to the right 2 units
B.
a vertical dilation by a factor of and a vertical shift down 2 units
C.
a vertical dilation by a factor of 3 and a vertical shift down 2 units
D.
a vertical dilation by a factor of 3 and a horizontal shift to the right 2 units
Answer:
C
Step-by-step explanation:
lol didn't i just answer one of your questions, also give me brainliest pls :)
First, the function was multiplied by 3, which is a vertical dialation by a factor of 3. Then, we subtracted 2 from the function, which is a vertical shift down two units. Therefore, the answer is C
The transformations are applied to the graph of the function should be option c. a vertical dilation by a factor of 3 and a vertical shift down 2 units
What transformation should be applied:Since
First, the function should be multiplied by 3, that represent vertical dilation by a factor of 3. After this, we subtracted 2 from the function, i.e. is a vertical shift down two units.
Therefore, the answer is C a vertical dilation by a factor of 3 and a vertical shift down 2 units.
Learn more about transformations here: https://brainly.com/question/19560160
Days of absence of 50 employees in a firm in
a month:
3,2,4,6,2,5,8,1, 9, 10, 2,3,4,7,3,4,2,5,9,1,
2,4,5,8,1, 9, 10, 2,3,7,6, 1,9,1,0,2,3,2,3,4,
3,5,6,7,4,7,8,9,1, 10.
Answer:
1
Step-by-step explanation:
A frozen yogurt shop sells 4 different types of fruit-flavored frozen yogurt. This is 20% of the flavors they sell. How many flavors do they sell?
d(n) = d( n - 1) + 0.4
Answer:
d'(n) = d
Step-by-step explanation:
Does the image reflect over the x or y axis ?
Answer:
actually both
Step-by-step explanation:
have a great day
Abduls bill at a restaurant is $28.65. He wants to leave and 18% tip for the waiter.what is the total amount abdul should leave? round to the nearest cent.
Answer:
I believe it will be 5.16.
Step-by-step explanation:
18% of 28.65 is 5.157, but rounded to the nearest cent will be 5.16. So 5.16 will be your answer. If this is wrong forgive me :3
At a restaurant last week, 4 times as many hot dogs were sold as hamburgers. The
restaurant sold a total of 588 hot dogs last week. Which equation can be used to find
how many hamburgers were sold at the restaurant last week?
4*n-588; n = 147 hamburgers
4xn-588; n = 122 hambungers
4x588 = n;n= 2,352 hamburgers
04x588 - nn- 2,022 hamburgers
Answer:
4×588= n;n=2,352 hamburgers
18 meters= how many centimeters
Answer:
1800
Step-by-step explanation:
can i have brainliets, please? hee hee
18m
to convert into cm;
=18x100
=1800cm
What is -7/5 + -7/2?
Answer:
-49/10 or -4 9/10
Step-by-step explanation:
-7/5 + -7/2 = -14/10 - 35/10 = -49/10 = -4 9/10
Please help!!!!!
!!!!
Answer:
C.
Step-by-step explanation:
-9 = X / -6 what does the variable
Answer:
x= 54
Step-by-step explanation:
-9=x/-6
x-6 on both sides
54= x
What is the domain of the function in this table?
Answer:
D. {1,2,3,4}
Step-by-step explanation:
The domain can only be x-values.