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yulyashka [42]
3 years ago
7

Identify which study method is illustrated by each example: a. The local department of transportation is responsible for maintai

ning lane and edge lines on its paved roads. There are two new paint products on the market. Twenty comparable stretches of road are identified. Paint Ais randomly assigned to ten of the stretches of road and paint B to the other ten. The department finds that paint B lasts longer.​
Mathematics
1 answer:
Nonamiya [84]3 years ago
8 0

Answer:

Experiment

Step-by-step explanation:

There is a “treatment” being applied which in this case is changing the environment which makes it and experiment

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Inessa05 [86]

We have the following expression given:

(4y^3+28y^2)+(y+7)

We can start selecting as common factor 4y^2 and we got:

4y^2(y+7)+(y+7)

Now we can select y+7 as common factor and we got:

(y+7)\left\lbrack 4y^2+1\right\rbrack

So then our final answer would be:

(y+7)(4y^2+1)

3 0
1 year ago
The coordinate of point T are (0,6). The midpoint of ST is (1,-2). Find the coordinates of point S
enot [183]

Answer:

-1, 12 I believe

Step-by-step explanation:

find the distance between the two given plots and do the opposite to find your answer

3 0
3 years ago
(b) Develop a probability distribution for x y. x y f(x y) 130 Incorrect: Your answer is incorrect. 80 Incorrect: Your answer is
GenaCL600 [577]

Answer:

P(X = x, Y = y) = f(x, y)

Step-by-step explanation:

Let X be a discrete random variable, and suppose that the possible values that it can assume are given by x1, x2,  x3, . . . , arranged in some order. Suppose also that these values are assumed with probabilities given by

P(X = xk) = f(xk)                k = 1, 2, . . . (1)

It is convenient to introduce the probability function, also referred to as probability distribution, given by

P(X = x) = f(x)

If X and Y are two discrete random variables, we define the joint probability function

of X and Y by

P(X = x, Y = y) = f(x, y)

where f(x, y) ≥ 0

5 0
3 years ago
A motor vehicle has a maximum efficiency of 39 mpg at a cruising speed of 40 mph. The efficiency drops at a rate of 0.1 mpg/mph
svp [43]

Answer:

38 mpg

Step-by-step explanation:

Initial efficiency = 39 mpg

Initial speed = 40 mph

Final speed = 50 mph

The efficiency drop  between 40 mph and 50 mph is given by:

E_d = 0.1 \frac{mpg}{mph}*\Delta V

The total efficiency drop from 40 to 50 mph is:

E_d = 0.1 \frac{mpg}{mph}*(50-40)mph\\E_d = 1\ mpg

Therefore, the efficiency at 50 mph is:

E_{50} = E_{40} -E_d\\E_{50} = 39 -1\\E_{50} = 38\ mpg

5 0
4 years ago
Find the missing angle to the nearest degree.<br> 21<br> 20<br> 29<br> degrees
zhuklara [117]

Answer:

110

Step-by-step explanation:

bc it is a right angle it has to ad up to 180

3 0
3 years ago
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