Answer:
Below.
Step-by-step explanation:
10, 14, 13, 13, 16, 12, 9,7
Arrange in ascending order:
7 9 10 12 13 13 14 16
The median = the mean of the middle 2 values
= (12 + 13) / 2 = 12.5 hours.
The mean = (7 +9 +10 +12+ 13+ 13+ 14+ 16) / 8
= 94/8
= 11.8 hours to nearest tenth.
Given the expression;
According to difference of two square;
x² - 16 = x²-4² = (x+4)(x-4)
Substitute;
Find the LCM
±1/5, ±1, ±11/5, ±11
Potential rational roots of 5x² -7x +11 will be of the form ...
(divisor of 11)/(divisor of 5)
so will include ...
B,D,E
y = -4
See attached worksheet.