6 erasers cost $6.60. Which equation would help determine the cost of 3 erasers?
1 answer:
You might be interested in
Answer:
The value is
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is
The sample mean is
The standard deviation is
The null hypothesis is
The alternative hypothesis is
Generally the test statistic is mathematically evaluated as
From the z - table the p-value is obtained and the value is
Answer:
<h2>Cubing both sides of an equation is reversible.</h2>Step-by-step explanation:
Squaring both sides of an equation is irreversible, because the square power of negative number gives a positive result, but you can't have a negative base with a positive number, given that the square root of a negative number doesn't exist for real numbers.
In case of cubic powers, this action is reversible, because the cubic root of a negative number is also a negative number. For example
We cube both sides
If we want to reverse the equation to the beginning, we can do it, using a cubic root on each side
There you have it, cubing both sides of an equation is reversible.