Answer:
7x^{4} - 56x^{3} + 35x^{2} + 28x - 42
Step-by-step explanation:
I hope is still help.
Answer:
12
Step-by-step explanation:
PEMDAS
9/3=3
3+9=12
Answer:
Sample size should be atleast 55320
Step-by-step explanation:
Given that a group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week.
population standard deviation 
Std error = 
Margin of error for 95%
= 
Since sample size is number of items it cannot be indecimal.
So we can round off to the next high integer on a safer side.
The perimeter of the given yard is P = 10x + 6
<h3>Perimeter of a rectangle</h3>
The formula for calculating the perimeter of a rectangle is expressed as:
P = 2(l + w)
where
l is the length
w is the width
Given the following parameters
length = 4x+6
width = x-3
Substitute
P = 2(4x+6+x-3)
P = 2(5x + 3)
P = 10x + 6
Hence the perimeter of the given yard is P = 10x + 6
Learn more on perimeter of a rectangle here: brainly.com/question/19819849
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