Answer:
a. P-value=0.421
b. not significant
Step-by-step explanation:
check attachment for further details
Answer: 44
Step-by-step explanation:
1/5 of the slab are grey implies that 4/5 are yellow.
The ratio of grey to yellow is thus given as :
1/5 : 4/5
which is 1 : 4
Therefore , the ratio of grey to yellow is 1: 4
The total ratio = 1 + 4 = 5
To calculate the number of yellow , we use the formula
number of yellow =
X total number of slabs , that is
number of yellow =
X 55
number of yellow slab = 44
See below for the proof of the equation
<h3>How to prove the equation?</h3>
The equation is given as:

Take the LCM

Expand

Evaluate the like terms

Rewrite as:

Factorize the numerator

Divide
2(a - b)= 2(a - b)
Both sides are equal
Hence, the equation
has been proved
Read more about equations at:
brainly.com/question/2972832
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Answer:
x² - 4
Step-by-step explanation:
Step 1: Write expression
(x + 2)(x - 2)
Step 2: FOIL
x² + 2x - 2x - 4
Step 3: Combine like terms
x² - 4
Answer:
6.
Step-by-step explanation:
|2y-2| when y = 2
= |2(-2)-2|
= |-4 - 2|
= |-6|
= 6.