13) y = 8x + 13
- 4x - 5y = 23

x=42/44

Step-by-step explanation:

Because y=8x+13, You will have to insert 8x+13 into y.

-4x-5(8x+13)=23

distribute 5(8x+13)

5(8x)+5(13)

40x+65

Now you have this equation: -4x-40x+65=23.

subtract -65 on both sides

-4x-40x+65-65=23-65

-4x-40x= -42

Solve the x: -4x-40x= -44x

Now you have -44x=-42

Divide 44 on each sides

-x=-42/44

x=42/44

(simplified: 21/22)

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.

the correct option is b

step-by-step explanation: