Algebra : ) my favorite!
the perimeter of a square is 80-64y units. which expression can be used to show the side length of one side of the square?
16y(5-4) each side measures 5-4 units.
4(20-16y) each side measures 20-16y units.
4y(20-16) each side measures 20-16 units.
explain for future reference, i have come across several of these problems, and i don't understand how to solve them. make sure you are absolutely positive of your answer, .
also, take your time to answer. i am in no hurry.

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

you never say the total so we cant find the percentage used for petrol

step-by-step explanation: