Zach is 3 years older than twice his sister maya’s age.
let m represent maya’s age and z represent zach's age.

which equation represents zach’s age?

z = 2m + 3

z = m + 3

z = 2m

z = 3m + 2

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.

i am unable to solve this problem

step-by-step explanation: