Simplifying the expression gives 36x^2 - 82x - 10 = 0
<h3>How to simplify the expression</h3>Given the expression;
4x-5/3+2x=7+2/9x+2
Cross multiply
Expand the bracket
Collect like terms
36x^2 + 8x - 45x - 27x - 18x = 0
Add the like terms
36x^2- 82x - 10 = 0
Thus, simplifying the expression gives 36x^2- 82x - 10 = 0
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Answer:
4.5 hour and 2 hour
Step-by-step explanation:
Given: The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviation of two hours.
To Find: If each time was increased by one hour, what would be the new mean and standard deviation.
Solution:
let the total numbers entries of hours in survey be =
each entry in survey be =
mean of survey is = =
standard deviation is = =
if each entry in survey is increased by one hour then,
each new entry in survey is =
the new mean is =
+
=
+ 1=
now,
standard deviation is
putting values,
=
=2
new mean and standard deviation are and