Answer: D
Step-by-step explanation: Just took the test
This method of gathering data is classified as an observational study, hence option D is correct.
What is an observational study?An observational study can also be called a comparative analysis, it involves carrying out a study between two groups and comparatively analyzing their outputs.
In summary, the two cows will be compared for both differences and similarities.
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A plumber can complete a job in 2 hours. If an apprentice helps, it takes only 1 1/3 hours. How long would it take the apprentice working alone?
Hello there I hope you are having a great day :) You Question A plumber can complete a job in 2 hours. If an apprentice helps, it takes only 1 1/3 hours. How long would it take the apprentice working alone?
(1 1/3) / 2 + (1 1/2) / a = 1
(4/3)a + (4/3)2 = 2a multiply both sides by 2a
(4/3)2 = (2/3)a subtract (4/3)a from both sides
8/3 = 2a/3 simplify
8 = 2a
4 = a
Hopefully that help you :)
The probability of randomly selecting a female customer from a group of 34 customers in a supermarket is 85%. Which of the following describes the likelihood of selecting a female customer? A. unlikely B. likely C. neither likely nor unlikely
Answer:
b.likley
Step-by-step explanation:
We can look at this like if we have less than a 50% probability it would be unlikley, vice versa if we have a more than a 50% probability than it will be likley. and if we had exactly 50% iit will be none, but in this case we have 85% which is more than 50% so its likley. hope this helped bae
Find the slope of the line that passes through these points.
(2, 2) and (4, 4)
Answer:
1
Step-by-step explanation:
We can find the slope using the slope formula
m = ( y2-y1)/(x2-x1)
= ( 4-2)/(4-2)
= 2/2
= 1
A bus leaves Dhaka on Saturday night and is supposed to arrive at Cox’s Bazar at 08 17
on Sunday morning. If the estimated journey time is 10h 43min, at what time should
the bus leave from Dhaka? pls h elp me
Answer:
9:34 pm
Step-by-step explanation:
First:
8:17 am
Go back 12 hours
8:17 pm
Round to 8:20
(keep the 3) Minus 43-17=26(3 is in this)
Therefore, 9:34 pm
Sorry if this doesn't make sense, it's hard to explain haha
F(x)=x-6
G(x)=2x-6x+1
Sorry, I have to attach my solution as Brainly says it contains a link or inappropriate word when it doesn't
BEEN ASKING FOR AN HOUR NOW!! the following two triangles are similar to each other. find the length of the missing side.
Answer:
19
Step-by-step explanation:
it is 1.9:1
10×1.9 is 19
Two trains, Train A and Train B, weigh a total of 351 tons. Train A is heavier than Train B. The difference of their weights is 181 tons. What is the weight of each train?
Answer:
Train A is 266 and Train B is 85
Step-by-step explanation:
If the difference is 181 tons, then subtract the difference to get double the weight of the lightest train.
351 - 181 = 170
170 ÷ 2 = 85
If B is the lightest, B is 85.
For A, either add the difference back or subtract 85 from 351.
85 + 181 = 351 - 85 = 266
Multiply the fractions. Select the answer that is in simplest form.
1
9x 2- = ?
6
A.
1
19
2
OB.
3
19
6
OC.
1
18-
6
I believe the answer is a
explanation:
9×2= 18
9×1= 9
which leaves us with 18 9/6
and that simplified is 19 1/2
PLEASE HELP!
Use the bar graph to find the relative frequency of the event.
The relative frequency of spinning an even number is _
Given that P(x)=2x²+5x-5
Q(x)=4x²-3x+2,
find...i) P(½)
ii)P(3)-Q(2)
iii) P(x).Q(x)
iv)P(x)+Q(x)
Answer:
[tex](i) P(\frac{1}{2}) = 2*(\frac{1}{2})^2 + 5*\frac{1}{2} -5[/tex]
[tex]=\frac{1}{2} +\frac{5}{2} -5\\\\=3-5 = -2[/tex]
[tex](ii) P(3) - Q(2) = 2(3^2)+5(3)-5 -[4(2^2) +3(2) +2][/tex]
[tex]= 18 + 15 -5 -16-6-2= 28-24 =4[/tex]
[tex](iii) P(x)\cdot Q(x) = (2x^2+5x-5)(4x^2-3x+2)[/tex]
[tex]=2x^2(4x^-3x+2) +5x(4x^2-3x+2)-5(4x^2-3x+2)\\\\=8x^4 -14x^3 -11x^2 -10x-20x^2+15x-10\\\\=8x^4 - 14x^3 -31x^2 +5 -10[/tex]
[tex](iv) P(x) + Q(x) = 2x^2 +5x -5 + 4x^2 -3x +2[/tex]
[tex]= 6x^2 +2x -3[/tex]
A box contains four red balls and eight black balls. Two balls are randomly chosen from the box, and are not replaced. Let event B be choosing a black ball first and event R be choosing a red ball second. What are the following probabilities? P(B) = ✔ 8/12 P(R | B) = ✔ 4/11 P(B ∩ R) = The probability that the first ball chosen is black and the second ball chosen is red is about percent
Answer:
P(B) = 8/12
P(R | B) = 4/11
P(B ∩ R) = 8/33
The probability that the first ball chosen is black and the second ball chosen is red is about 24 percent.
Step-by-step explanation:
I just got it right on edge 2020. Good luck with school!!
The probability that the first ball chosen is black and the second ball chosen is red is about percent is 66.67%.
What is the probability?Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event.
We know that, probability of an event = Number of favourable outcomes/Total number of outcomes.
Given that, a box contains four red balls and eight black balls.
Let event B be choosing a black ball first and event R be choosing a red ball second.
Here, total number of outcomes = 4+8 =12
P(B) = 8/12 and P(R)=4/12
We know that, P(R|B) =P(R∩B)/P(B)
Here, P(R∩B)= 8/12 × 4/12
= 2/3 × 1/3
= 2/9
So, P(R|B) =2/9 × 12/4
= 2/3 ×100
= 66.67%
Therefore, the probability that the first ball chosen is black and the second ball chosen is red is about percent is 66.67%.
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Riley received financial assistance to pay for his college education. After he graduates, he will have to pay back the amount of money he received plus any interest that accrues after graduation.
Which kind of financial assistance did Riley receive?
Answer:
student loan
Step-by-step explanation:
PLEASE WILL MARK BRAINLIEST / ITS VERY EASY (PROBABLY)
Answer:
Answer given below
Step-by-step explanation:
1. [tex]\frac{1}{5}x + \frac{1}{3} - \frac{2}{5}x = \frac{-1}{5}x + \frac{1}{3}[/tex]
2. [tex]\frac{1}{5} x + \frac{1}{3} + \frac{2}{5} x = \frac{3}{5} x + \frac{1}{3}[/tex]
3. [tex]\frac{2}{5}+ \frac{2}{3}x- \frac{1}{5} = \frac{2}{3}x+ \frac{1}{5}[/tex]
In this problem we will be dealing with the probability density function (pdf) associated with a continuous random variable, X. Remember that the pdf is basically a function that assigns a probability density to the event of X taking a value x in the domain of X, with following two properties:
1 f(x) > 0, for all x
2 f(x) dx = 1.
f(x) does not give us the exact probability of X to take value x. Since the size of the domain of X is infinite, you cannot calculate the probability. Instead, you can calculate the probability of X to lie within a range:
Pr(a < X < b) = - / sa f(x) dx
Consider the following pdf function: 6x(1 – x) if 0 < x < 1,
f(x) = 0 otherwise. Calculate the probability of P(0.3 < X < 0.7)
a) 0.784
b) 0.568
c) 0.216
d) -0.568
Answer:
[tex]b)\ 0.568[/tex]
Step-by-step explanation:
Given
[tex]f(x) = 6x(1- x);\ 0 \le x \le 1[/tex]
Required
[tex]P(0.3 < x < 0.7)[/tex]
From the question, we have:
[tex]P(a < x < b) = \int\limits^b_a {f(x)} \, dx[/tex]
So, we have:
[tex]P(0.3 < x < 0.7) = \int\limits^{0.7}_{0.3} {6x(1 - x)} \, dx[/tex]
Open bracket
[tex]P(0.3 < x < 0.7) = \int\limits^{0.7}_{0.3} {6x - 6x^2} \, dx[/tex]
Integrate
[tex]P(0.3 < x < 0.7) = \frac{6x^2}{2} - \frac{6x^3}{3}}|\limits^{0.7}_{0.3}[/tex]
[tex]P(0.3 < x < 0.7) = 3x^2 - 2x^3|\limits^{0.7}_{0.3}[/tex]
Substitute 0.7 and 0.3 for x
[tex]P(0.3 < x < 0.7) = (3*0.7^2 - 2*0.7^3) - (3*0.3^2 - 2*0.3^3)[/tex]
Using a calculator, we have:
[tex]P(0.3 < x < 0.7) = (0.784) - (0.216)[/tex]
Remove brackets
[tex]P(0.3 < x < 0.7) = 0.784 - 0.216[/tex]
[tex]P(0.3 < x < 0.7) = 0.568[/tex]
It takes 0.25 cup of sugar to make a batch of chocolate chip cookies. I have 5.50 cups of sugar. How many batches of cookies can I make?
Answer:
22
Step-by-step explanation:
5.50/0.25 = 22
Answer:
22
Step-by-step explanation:
5.50 cups of sugar divided by the .25 cups needed for each batch gives you 22 :)
If f(x) = 6x3 – 11x2
6x3 – 11x2 – 26x + 15 and
f(3) = 0, then find all of the zeros of f(x)
algebraically.
Answer:
f(6)g(8)f(3)=0
Step-by-step explanation:
its a mathematics formula its ia trick
How many solutions does the following linear equation have?
y = -2x -4
y = 1/2x - 5
Answer:
x=2/5, y=-24/5. (2/5, -24/5).
Step-by-step explanation:
y=-2x-4
y=1/2x-5
----------------
-2x-4=1/2x-5
-2x-1/2x-4=-5
-4/2x-1/2x=-5+4
-5/2x=-1
5/2x=1
x=1/(5/2)
x=2/5
y=1/2(2/5)-5
y=1/5-5
y=1/5-25/5
y=-24/5
To ease congestion in a downtown area, city planners are considering a plan to widen a major thoroughfare from
two driving lanes to three driving lanes. This plan would require closing a section of downtown streets as the work
begins. In order to assess public support for the plan, city planners provided a phone number to residents that could
be used to register opinion for or against the plan. In total, 267 calls were received, with only 24% supporting it.
Which statement describes the most likely type of bias in this setting?
This is nonresponse bias because many residents may choose to not participate.
This is question wording bias because the phrasing of the plan may have confused some residents.
This is voluntary response bias because residents could choose to call and register their opinion.
O This is response bias because residents may not be honest with their feelings about the plan.
Answer:
the answer is C. This is voluntary response bias because residents could choose to call and register their opinion.
Step-by-step explanation:
just got 100 on the quiz
please help.............................
Answer:
Step-by-step explanation:
Like therms have the same literal part
-6/7p + 1/7
Both questions I need help with please!!
Answer:
15: 58 degrees. 16: Answer D
Step-by-step explanation:
Question 15
All you have to do for this one is to add the angle measures of 22 and 36 degrees together to get the answer of 58 degrees.
Question 16
The interior angles of a triangle will always add up to 180 degrees.
Therefore, 180 - 53 - 21 is the answer, which totals 106 degrees.
Pls help extra points and mark brainlist
Answer:
IQR = 16
Step-by-step explanation:
IQR = 75% - 25%.
Reading from the box plot: 75% = 22 and 25% = 6.
22 - 6 = 16
2. The Suspect was drinking lemonade out of a cylindrical glass, with a diameter of 8cm. When they first filled up their glass, it was 14cm full, but it is now 11.12cm full The weight of the suspect is equal to the volume of lemonade the suspect drank (Round your answer to the nearest whole number:)
Answer:be smart
Step-by-step explanation:be smart
Elasticity is an important parameter of kernmantle ropes (used inclimbing, caving, mountaineering, etc.). One of the ways of describing it is static elongation, measuredas amount (percentage) of rope stretch under a resting load of 80 kg. Static elongation was measuredfor two random rope samples of two different types of weaving. The observed sample means, standarddeviations, and sample sizes were the following.
Type 1: Type 2: Ti = 6.2888 $i = 0.1352 ni = 17 T2 = 6.4007 S2 = 0.1070 n1 = 14
Is there evidence to support the claim that type-2- ropes are more elastic than type 1? Use a = 0.05 and assume that the populations variances are equal. Remember for state the null and alternative hypotheses, the decision rule, and your conclusion.
Answer:
We reject H₀ . We found that at significance level of 0,05 the mean of the type 2 rope is greater than that of rope 1
Step-by-step explanation:
Type 1 rope information:
x₁ = 6.2888
s₁ = 0.1352
n₁ = 17
Type 2 rope Information:
x₂ = 6.400
s₂ = 0.1070
n₂ = 14
We don´t know population standard deviation
We assume that populations follow normal distribution
Hypothesis Test:
Null Hypothesis H₀ x₂ = x₁
Alternative Hypothesis Hₐ x₂ > x₁
The alternative hypothesis indicates a one-tail test on the right
Significance level α = 0,05 confidence Interval 95 %
Degrees of freedom for t(c) is n₁ + n₂ - 2 = 17 + 14 - 2
df = 31 - 2 df = 29
Then from t- student table we get t(c) = 2,045
To calculate t(s)
t(s) = ( x₂ - x₁ ) / sp √ ( 1/n₁ + 1/n₂
Doing calculations:
√ (1/n₁ + 1/n₂ = √ 1/17 + 1/14 = √ 0,0588 + 0,0714 = √ 0,1302
√ (1/n₁ + 1/n₂ = 0,3608
sp² = ( n₁ - 1 )* s₁² + ( n₂ - 1 )*s₂² / n₁ + n₂ - 2
sp² = 16* (0,1352)² + 13* ( 0,1070)² / 29
sp² = 16*0,0183 + 13* 0,0114 / 29 = 0,2928 + 0,1482 / 29
sp² = 0,01520
sp = 0,1233
By substitution
t(s) = ( 6,400 - 6,2888 ) / 0,1233*0,3608
t(s) = 0,1112 / 0,0444
t(s) = 2,5045
Comparing t(s) and t(c)
t(s) > t(c) 2,50 > 2,045
Then t(s) is in the rejection region we reject H₀ . We found differences between the means of the two groups.
b. Convert 17 g to oz
Answer:
2176 ounces
Step-by-step explanation:
one gallon has 128 ounces
The length of a rectangle is 6.7 cm, correct to 2 significant figures. For the length of the rectangle
write down the lower bound
Answer:
[tex]Lower\ Bound = 6.65cm[/tex]
Step-by-step explanation:
Given
[tex]Length = 6.7cm[/tex] to 2sf
Required
The lower bound
The lengths are approximately 6.7cm to 2sf are:
[tex]Length = \{6.65 \to 6.74\}[/tex]
Such that:
[tex]Length = \{Lower\ Bound \to Upper\ Bound\}[/tex]
So, by comparison:
[tex]Lower\ Bound = 6.65cm[/tex]
What is x if 2784 = 36x?
Answer:
77 1/3
Step-by-step explanation:
to get x you have to divide both sides by 36
2784=36x
x=77 1/3
you can also use an algebra calculator for it
Answer:
77.333
Step-by-step explanation:
So we are given the equation
2784 = 36x
But we need to find the value of just x. So if 36 x = 2784:
2784/36 = x
How did we do this? Well, we divided each side of the equation by 36, which gives us the amazing value of just x.
Solve the equation
77.333 = x
Now, lets check our work:
77.333 x 36 = 2783.88
This is the closest I believe we can get.
Hope this helps!
--Applepi101
Bronco, Inc., imposes a payback cutoff of three years for its international investment projects.
Year Cash Flow (A) Cash Flow (B)
0 –$ 61,000 –$ 71,000
1 23,500 15,500
2 29,000 18,500
3 21,500 27,000
4 8,500 231,000
What is the payback period for both projects?
Answer:
4476966756TTTVFD
Step-by-step explanation:
We're working on Area of a Triangles on Coordinate Grids what's the area of this triangle here? The screenshot attachment is the problem that needs to be solved. If someone could answer quickly I would appreciate it! This is geometry by the way.
Answer:
11.5 square units
Step-by-step explanation:
It’s a 4 by 6 rectangle, so the total is 24. Then subtract the three little triangles on the outside. (Much easier than doing the main triangle).
1/2x1x4=2
1/2x1x6=3
1/2x3x5=7.5
2+3+7.5=12.5
24-12.5=11.5
MARKING AS BRAINLIST!!!!! These figures are congruent. What series of transformations moves pentagon FGHIJ onto pentagon FG'HTI'? y S CO G 2 G -8 -6 4 4 6 8 H -4 -6 -8 Note: Rotations are clockwise. Reflections are over the x-or y-axis. A. Rotation, reflection O B. Translation, reflection
Answer:
c
Step-by-step explanation:
Which of the following phrases translates to x - 9?
nine minus a number
nine decreased by a number
the difference between nine and a number
nine subtracted from a number
Answer:
the difference between nine and a number
Step-by-step explanation: