Answer:
B
Step-by-step explanation:
I don't know
An appropriate test for the investigation is, One sample t-test for sample mean. So option B is correct
What is a random sample ?The process of selecting a sample of data from a population in order to draw conclusions about the population is known as random sampling. Additionally known as probability sampling. Non-probability sampling, often known as non-random sampling, is this sample's opposite. Simple random sampling, stratified sampling, cluster sampling, and multistage sampling are the main forms of this sampling. Convenience samples are often referred to as non-arbitrary samples in sampling methodologies.
Given that,
Population mean = $100
Sample = n = 56
Sample mean = $102.30
sample standard deviation = $5.30
So, all the data mean, standard deviation is given
therefore, t-test used and one type of sample used as well
Hence, It is one-sample t-test for sample mean
To know more random sample check:
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PLEASE HELP MEEEEE!!!!!
Answer:
Tan ∠E = 63/16 = 3.9375
Step-by-step explanation:
Tan ∠E = 63/16 = 3.9375
Answer:
Try 63/16 which is 4.0625
Step-by-step explanation:
Again im sorry if its incorrect. XD hope it helps tho. doing the rest o ur question noe .. tehe
A teacher bought pencils for $14.99, but she knows the store bought them for $8.50. What is the percent markup to the nearest whole?
Answer:
20
Step-by-step explanation:
23 would be the answer but its rounding to the nearest whole
3x - 4 + 2(-3 - 6x).
Answer:
-9x - 10
Step-by-step explanation:
Answer:
x=9/2
Step-by-step explanation:
So in this equation we have to solve using PEMDAS, or parentheses, exponents, multiplication, division, addition, then subtraction, going from left to right. So first, i deal with whats in the parentheses, but since it cannot be subtracted, I next go on to the next step. Since there are no exponents, our next step is to multiply or distribute 2 into (-3-6x). In other words, i multiply 2 by -3 and 2 by -6x. This is going to be -6 -12x. After that, i add and subtract common factors, so 3x-12x is -9x, and -4-6 is -10. This leaves us with -9x-10=0. I add 10 to each side according to addition property of equality. Thus, the equation is -9x=-10. Divide both sides by -9, by the division property of equality, and u get 10/9. If you want a decimal answer, type it into a calculator.
5.Regarding the equations below. What is the value of x?
5x + 2y = 4
x – 3y = –23
Answer:
x=−2
y=7
Step-by-step explanation:
5x+2y=4
x−3y=−23
In order to solve by elimination, coefficients of one of the variables must be the same in both equations so that the variable will cancel out when one equation is subtracted from the other.
5x+2y=4,x−3y=−23
To make 5x and x equal, multiply all terms on each side of the first equation by 1 and all terms on each side of the second by 5.
5x+2y=4,5x+5(−3)y=5(−23)
Simplify.
5x+2y=4,5x−15y=−115
Subtract 5x−15y=−115 from 5x+2y=4 by subtracting like terms on each side of the equal sign.
5x−5x+2y+15y=4+115
Add 5x to −5x. Terms 5x and −5x cancel out, leaving an equation with only one variable that can be solved.
2y+15y=4+115
Add 2y to 15y.
17y=4+115
Add 4 to 115.
17y=119
Divide both sides by 17.
y=7
Substitute 7 for y in x−3y=−23. Because the resulting equation contains only one variable, you can solve for x directly.
x−3×7=−23
Multiply −3 times 7.
x−21=−23
Add 21 to both sides of the equation.
x=−2
The system is now solved.
x=−2,y=7
Graph if needed:
A store manager earns
$
24.00
per hour. If the manager works
8
hours one day and donates
1
10
of the day’s earnings to charity, how much of the earnings are left?
Answer:
165.6=x
Step-by-step explanation:
(24.00*8)0.90=x
184.00*0.90=x
165.6=x
What is the completely factored form of xy3 – x3y?
Answer: x y (y - x) (x + y)
-x y (x - y) (x + y)
x (y^3 - x^2 y)
Real roots:
x = 0
y = 0
Roots:
y = -x
y = x
hope this helps
Step-by-step explanation:
Answer
A
Step-by-step explanation:
What is the solution to the system of equations graphed below?
find the square root of 2.2 correct to two place of decimal
Answer:
1.48
Step-by-step explanation:
my calculator said sqrt(2.2)=1.48
∠aangle, a and ∠ b ∠bangle, b are complementary angles. ∠ a ∠aangle, a measures 5 5 ∘ 55 ∘ 55, degrees. What is the measure of ∠ b ∠bangle, b?
Answer:
∠b=35
Step-by-step explanation:
Hello There!
Complementary angles add up to equal 90
so to find the measure of angle B we subtract the given angle from 90
90-55=35
so we can conclude that ∠b = 35
Find the solution(s) to the system of equations. Select all that apply.
y=x²-4
y=-x-2
The solution will be the intersection points thus options A (1,-3) and B (-2,0) will be correct.
What is a graph?The graph is a geometrical representation of a function and can be plotted by taking x's and y's corresponding values within the interval.
For example plot of y = x³ ,y = sinx.
The solution will be the intersection points of both functions.
At the intersection point,
x² - 4 = -x - 2
x² + x - 2 = 0
x² + 2x - x - 2 = 0
x(x + 2) - (x + 2) = 0
(x - 1)(x + 2) = 0
x = 1,-2
At x = 1
y = -1 - 2 = -3 so first intersection is (1,-3)
At x = -2
y = -(-2) - 2 = 0 so second intersection is (-2,0)
Hence "The solution of the given system of equations is (1,-3) and (-2,0)".
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Last Monday, a parking lot had 80 cars. Of those 80 cars, 40% were silver, 20 were red, and the rest were white. What percent of the cars were white?
What percent of the cars were white?
WRITE AN EQUATION RHAT DESCRIBES THE PATTERN SHOWN IN THE TABLE!! Please help!!! HURRY PLEASE TYSM
Answer:
he depends on the 12th week because he ran more miles
Step-by-step explanation:
8<10<13<17
The area of a parallelogram is 16 cm. One side Height is 4 cm. What is the length? options are:- 5 cm none of these 4cm 8cm
Answer: 4cm
Step-by-step explanation:
The area of a parallelogram is calculated by multiplying the height by the length:
Area = Height * length
Assume the length is x, substituting values would make the formula:
16 = 4 * x
4x = 16
x = 16/4
x = 4 cm
help you will get brainliest if you are right
Step-by-step explanation:
1-b 2-c 3-d 4-a yep I belive this is correct sorry if I'm wrong
What is the slope of the line?
Answer:
-3/2
Step-by-step explanation:
Down 3 and right 2 so -3/2
Answer:(0,2) ,(0,1)
0-0=0
1-2=-1
-1/0
not sure bout it
Step-by-step explanation:
Please help me will mark brainliest
1. Akari has a sink that is shaped like a half-sphere. The sink has a volume of
8000
*n in. One day, her sink clogged. She has to use one of two
3
cylindrical cups to scoop the water out of the sink. The sink is completely full,
when Akari begins scooping. Hint: you may need to find the volume for both.
(a) Cup A has a diameter of 4 in, and a height of 8 in. Find the Volume of Cup A.
(b) Determine how many cups of water must Akari scoop out of the sink with Cup A to
empty it? Round the number of scoops to the nearest whole number, and make
certain to show your work.
(c) Cup B has a diameter of 8 in, and a height of 8 in. Find the volume of Cup B.
(d) How many cups of water must she scoop out of the sink with Cup B to empty it?
Round the number of scoops to the nearest whole number, and make certain to
show your work
Answer:
the fisrst cup has a volume of 100.53
Step-by-step explanation:
Please help
What is the unknown value for u:3 = 2:6
Answer: i think it should be 1:3=2:6
Step-by-step explanation:
Answer:
U=1
Step-by-step explanation:
You have a 10% coupon for your favorite restaurant. You order $75 worth of food and drinks. What will your bill be (before tax) after the 10% discount?
Answer: $67.50
Step-by-step explanation:
In each of the following graphs, the two given polygons are similar. Write precisely a single dilation (coordinates of center and coefficient) by which the image (labeled with primed letters) was obtained. Will Give Brainiest!!!!!
Answer:
Center: (0,0) coefficient: [tex]\frac{1}{3}[/tex]
Step-by-step explanation:
The side of the smaller polygon is 1/3 the size of the larger one, and that is why the coefficient is 1/3.
Polygon MNPQ was dilated by a scale factor of 1/3 and center of dilation (0, 0) to create M'N'P'Q'.
What is dilation?Dilation is the increase or decrease in the size of a figure by a scale factor of k, thereby creating an image.
From the diagram:
Scale factor = N'P' / NP = 2/6 = 1/3
Center = (0, 0)
Polygon MNPQ was dilated by a scale factor of 1/3 and center of dilation (0, 0) to create M'N'P'Q'.
Find out more on dilation at: https://brainly.com/question/10253650
Which of the following are possible solutions for the inequality ??
WHICH IS AN IRRATIONAL NUMBER?
BRAINLYIST!!
Answer:
The first one
Step-by-step explanation:
The second one is 0.
The third one is rational, just 0.6.
The last one is just the absolute value, which is 3.
Answer: C or D
Step-by-step explanation:
33 POINTS! Right answer gets brainliest
Find the area of the shape below.
Answer: 112.5 m^2
Step-by-step explanation:
Area of rectangle = lw
l = 7.5
w = 15
7.5 * 15 = 112.5
Answer:
112.5 Meters
Step-by-step explanation:
The Area is length x width.
7 1/2 meters x 15 meters is equal to 112.5 meters to therefore the Area of that rectangle is 112.5 meters.
Use the probability distribution table to answer the question.
What is P(2≤X≤5)?
Enter your answer, as a decimal, in the box.
X P
0 0.45
1 0.21
2 0.15
3 0.09
4 0.07
5 0.02
6 0.01
Answer:
1. 0.21 like that has happened
HELP PLS i really need help
Evaluate 3x + 7 for x = 5.
Answer:
22
Step-by-step explanation:
If x = 5, then plug 5 in for x .
3(5) + 7
15 + 7 = 22
Answer:
22
Step-by-step explanation: 3x + 7
3*5 = 15
15+7=22
Vector MN is comprised of the points M(8,-4) and N(-7,-2).
Find the direction angle of the vector
Answer:
22/65/53 +r 76 = 228594
Step-by-step explanation:
First 22/65/53+r 76 = 228594
4 3. Brodie has a bag of mixed fruit snacks. In the bag, there are 8 cherry fruit snacks and 12 strawberry fruit snacks. What is the ratio of strawberry to cherry? b (answer should be in simplest form)
Answer: simplified ratio would be 3:2
Step-by-step explanation: the ratio would be 12:8
Answer:
2-3, 2 to 3, or 2:3
Step-by-step explanation:
lauren took 12 hours to read a 360 boo.at this rate how long will it take her to read a 400 page book
Answer:
13.33 hours
Step-by-step explanation:
[tex]\frac{12}{360} =\frac{x}{400} \\\\360x=4800\\x= 13.33[/tex]
How much more than the original $10,000 do you pay in interest?
Answer:
In a savings account earning 0.01%, your balance after a year would be $10,001.
Step-by-step explanation: