How did they go from =-9/2(x+6) to =-9/2x-54/2 ???

Hi, I don't know if you still need the answer, but here you go:

They used distributive property.

Step-by-step explanation:

They multiplied -9/2 times "x" and then, times "+6".

First, you get -9/2x for the first term in the parenthesis.

Second, you multiply -9/2 times 6 in the form of a fraction.

* When multiplying fractions, you multiply straight across so:

-9/2 × 6/1 = -54/2

Leaving you with:

-9/2x-54/2

The -54/2 simplifies into -27, which gives you:

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.

congruent segments

step-by-step explanation: