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Zigmanuir [339]
3 years ago
14

A headline in a major newspaper read, "Breast-fed youth found to do better in school."a. Do you thinkthis statement was based on

an observational study or a randomized experiment? Explain.b. Given your answer in part (a), which of these two alternative headlines do you think would be preferable: "Breast-feeding leads to better school performance" or "Link found between breast-feeding and school performance"? Explain.
Mathematics
1 answer:
Maurinko [17]3 years ago
3 0

Answer:

Randomized experiment

Step-by-step explanation:

Such a statement is said to be Randomized experiment as the kids in the school have been selected at random and their performances are observed and recorded. Later it is inquired if they are breast fed or not. This information is later assessed and a conclusion is reached. This type of research or experiment is Randomized experiment.

Considering that the experiment is Randomized, the statement should be "Link found between breast-feeding and school performances". This statement does not restrict the performances of the student specifically on breast-feeding but shows a probable affect of it.

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What is the answer to 210 heartbeats in 3 minutes what is the unit rate
S_A_V [24]
For this question you have to find how many heartbeats are in 1 minute.
So if you divide 210 by 3 you get 70
So, my answer here would be. 70 heartbeats per minute
3 0
4 years ago
Given the figure. Find AC.
Angelina_Jolie [31]

Image is missing, so i have attached it.

Answer:

AC = 10sin 40°

Step-by-step explanation:

From the diagram attached, using terms in trigonometric ratio, AC is the opposite side, BC is the adjacent side and AB is the hypotenuse.

Thus, since we want to find AC;

We know that in trigonometric ratios; opposite/hypotenuse = sin θ

In the diagram, θ = 40° and AB = 10

Thus,

AC/10 = sin 40°

Multiply both sides by 10 to get;

AC = 10sin 40°

7 0
4 years ago
How do you solve this 4x+5xy–2y?
Kitty [74]

The simplified expression of 4x + 5xy - 2y is 4x(1 + y) + y(x - 2)

<h3>How to solve the expression?</h3>

The expression is given as:

4x + 5xy - 2y

The above expression cannot be solved.

However, the expression can be grouped

So, we have:

4x + 5xy - 2y

Rewrite 5xy as 4xy + xy

So, we have:

4x + 5xy - 2y = 4x + 4xy + xy - 2y

Factorize the expression

4x + 5xy - 2y = 4x(1 + y) + y(x - 2)

Hence, the simplified expression of 4x + 5xy - 2y is 4x(1 + y) + y(x - 2)

Read more about expressions at:

brainly.com/question/723406

#SPJ1

4 0
2 years ago
Hi guys, I need help on this practice anyone willing to help; list of things to do
andreyandreev [35.5K]

Answer:

B. y = x - 2

Step-by-step explanation:

The sale price (y) is $2 less than the original price (x - 2).

To test this out, if a book's original price is $10..

x = 10

Using y = x - 2 and to test out if it works, we'll plug in x = 10 to discover y.

y = 10 - 2

y = 8

5 0
3 years ago
A collection of nickels and dimes is worth $6.10. There are 67 coins in all. How many nickels are there? 12 18 49 55
joja [24]
.05n + .10d = 6.10
n + d = 67
n = 67-d

.05(67-d) + .10d = 6.10
3.35 -.05d + .10d = 6.10
3.35 + .05d = 6.10
3.35-3.35 +.05d = 6.10-3.35
0.05d = 2.75
0.05d/0.05 = 2.75/0.05
d = 55

n + d = 67
n + 55 = 67
n = 12
There are 12 nickels

Check
0.5(12) + .10(55) = $6.10
.60 + 5.50 =$6.10
$6.10 = $6.10
8 0
3 years ago
Read 2 more answers
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