Answer:
Option B is correct - this experiment has one factor (shampoo type), blocked by gender and whether the hair is dyed.
Step-by-step explanation:
The researcher desires to compare the effect of a new type of shampoo, he also has the opinion that men and women may react to the shampoo differently.
Furthermore, he believes that the shampoo will react differently to the hair that is dyed.
Therefore, this experiment has one factor(shampoo-type), blocked by gender and whether the hair is dyed.
Hence, option B is the correct option.
It would take exactly 4 years for these trees to be the same height.
Step-by-step explanation:
Given,
Height of Tree A = 9 feet
1 feet = 12 inches
9 feet = 9*12 = 108 inches
Growth rate = 2 inches per year
Let,
y be the number of years.
A(y)= 108 + 2y
Height of Tree B = 8 feet
8 feet = 8*12 = 96 inches
Growth rate = 5 inches per year
B(y)=96+5y
In case of same height;
A(y)=B(y)
Dividing both sides by 3
It would take exactly 4 years for these trees to be the same height.
Keywords: functions, division
Learn more about functions at:
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This statement is false, it is not true that any polygon with two pairs of parallel opposite sides is considered to be a parallelogram for it is defined opposite than that. That is why the correct answer in the statement above is that it is false.
Answer:
2.8
Step-by-step explanation:
15.3-12.5
When you have a positive and negative, you subtract and keep the sign of the larger number.