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My name is Ann [436]
3 years ago
12

Which of these variables could be investigated ONLY through observational studies?

Mathematics
2 answers:
LiRa [457]3 years ago
4 0

Answer:

BRUH

Step-by-step ex planation:

bruh moment so yeah thats the answer gimme them point

Mashcka [7]3 years ago
4 0

Answer:

I think its B

Step-by-step explanation:

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One litre of paint covers 1.5 square meters. How many litres must I buy so that I have enough to paint a wall 6 m long and 3 m h
alina1380 [7]

Answer:

12 litres

Step-by-step explanation:

The area to be covered is

A = 6 × 3 = 18 m²

Divide the area by 1.5 for required amount of paint, that is

18 ÷ 1.5 = 12 litres

4 0
3 years ago
According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are re
mr Goodwill [35]

Answer:

See explanation.

Step-by-step explanation:

We are looking at a geometric distribution.

The probability of selecting a brown peanut is .12 = p

The probability of not selecting a brown peanut is .88 = q

The probability mass function is p(y) = (.88)^(y-1) * (.12)

a) p(7) = (.88)^6 * .12 = .0557

b) p(7 <= y <= 8) = p(7) + p(8)

   = .0557 + (.88)^7 * .12 = .1048

c) p(y <= 7) = p(0) + p(1) + ... + p(7)

   = .12 + (.88)^1 * .12 + (.88)^2 * .12 + ... + (.88)^6 * .12 = .4713

d) The expect value is 1/p. So, 1/(.12) = 8.33 M&M's

6 0
4 years ago
Read 2 more answers
What is the slope of a line that passes through the points (9,-6) and (-8,7)?
lianna [129]
<h2>Answer:    slope = - ¹³/₁₇  </h2>

Step-by-step explanation:    

       The question gives us two points, (9,-6) and (-8,7), from which we can find the slope and later the equation of the line.

<u>Finding the Slope  </u>

The slope of the line (m) = (y₂ - y₁) ÷ (x₂ - x₁)    

                                         =  (7 - (- 6)) ÷ (-8 - 9)  

                                         =   - ¹³/₁₇  

<em><u>Checking my answer:</u></em>

Finding the Equation

<em>We can now use the point-slope form (y - y₁) = m(x - x₁)) to write the equation for this line:</em>

<em>                                  ⇒  </em><em>y - (-6) =  - ¹³/₁₇ (x - 9)</em>

<em>                                          </em>

       

<em>To test my answer, I have included a Desmos Graph that I graphed using the information provided in the question and my answer.</em>

8 0
2 years ago
︎︎︎︎ ︎︎ ︎︎︎ ︎︎ ︎︎︎ ︎︎︎︎ ︎︎︎︎︎ ︎︎︎︎​
Basile [38]

Answer:

67

is it multiple choise

6 0
3 years ago
Mark is using the ratio of 3 tablespoons of sugar to 2 tablespoons of milk in a recipe complete the table to show equivalent rat
Hatshy [7]
I can't see a table, this is how you increase the recipe;

Ratio Mark's using is: 3:2 then 6:4, 9:6, 12:8 so on..
3 0
3 years ago
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