A total of 360 people were surveyed. Of the people surveyed, 70 said they were an early bird and preferred tea. The percentage o
f people surveyed who are night owls is ___%. The percentage of early birds who prefer to drink tea is ___%.
1 answer:
You might be interested in
We need to start from the innermost parenthesis and work our way out.
The first parenthesis is . These are not like terms because one involves a variable, while the other is a constant term. Two terms are summable if they involve the same power(s) of the same variable(s).
So, we can take one step outwards, and we arrive to the square brackets. We have
and 2z and -13z are like terms, so we can sum them:
Finally we arrive to the whole expression, which is
Because, again, 5z and 11z were like terms.