The relationship between the cost of books and pens is an illustration of linear equation.
The linear equation is (a) 
From the question, we have:
x exceeds 2 times y by 10
Rewrite as:
x exceeds 2y by 10
Exceed means plus (+)
So, we have:
Equate the above equation to 0
Hence, the required equation is (a)
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The travel of the spring is it’s amplitude, which is a cosine function.
The lowest y value is -5
Multiply that by cosine of pi x time
The formula is d = -5cos(pi t)
Answer:
1480 grams.
Step-by-step explanation:
3200 grams = 3200/1000
= 3.2 kgs.
Difference in weight = 4.68 - 3.20
= 1.48 kgs
= 1480 grams.
Answer:
The margin of error is 
Step-by-step explanation:
From the question we are told that
The sample size is 
The sample mean is 
The standard deviation is 
Given that the confidence level is 95% the the level of significance can be evaluated as
Next we obtain the critical value of 
from the normal distribution table,the value is 
Generally the margin of error is mathematically represented as
substituting values
The elevation of the city is between -15 and -16
Step-by-step explanation:
The Earth surface is highly uneven. Hence for relative comparison, scientist over the world assume the sea level as the reference point (meaning that sea level is considered to be at 0 elevation and all other elevations and depths are calculated regarding the sea level)
As given in the question city’s elevation is 15.3 feet below sea level. Hence the city is below the sea level by 15.3 feet
On the mathematical scale below 0 would mean the number system is negative. Similarly, the city is located at -15.3 feet when compared to sea level which is at 0 feet.
Hence -15.3 would lie between -15 and -16
