What should be the first step in adding these equations to eliminate y
8x+3y= 2
+ 4x-by=-7

Step-by-step explanation:

Are you sure you wanted that "b" in the second equation?

If so, here's how we eliminate y:

1) Multiply the first equation by b:  8bx + 3by = 2b

2) Multiply the second equation by 3:  12x - 3by = -21

3) Combine these two results.  We get:

(8b + 12)x = 2b - 21

Here we have eliminated  y, but still have an equation in two variables, b and x.

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.

asdasdsad

step-by-step explanation: