3x - y = 17
x + y = - 5

x = 3 and y = -8

Step-by-step explanation:

eliminate your y value

4x = 12 (divide 12 by 4)

x = 3

plug x into whichever variable you want, I went with the 2nd one.

3 + y = -5 (subtract 3 from both sides to get y by itself)

y = -8

Check your answer by plugging both answers in

3 - 8 = -5

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.

7

step-by-step explanation: