A cell phone company is testing battery life of phones 7 hours after the same amount of the usage. The following numbers represent the % of the batter life of 20 phones. 80, 75, 85, 90, 88, 79, 90, 82, 89, 80, 79, 83, 82, 85, 84, 75, 77, 79, 81, 5 Which measure of central tendency best represents the data? Explain your reasoning.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

3 ft is your answer