Ijust need with these two problems

34. 3d - 4 + d = 8d - (-12)

3d + d - 4 = 8d + 12

4d - 4 = 8d + 12

4d - 8d - 4 + 4 = 8d - 8d + 12 + 4

-4d = 16

(-4d)/(-4) = 16/(-4)

d = -4

d = -4

35. f - 6 = -2f + 3(f - 2)

f - 6 = -2f + 3 * f - 3 * 2

f - 6 = -2f + 3f - 6

f - 6 = f - 6

f - f - 6 + 6 = f - f - 6 + 6

0 = 0

Since 0 = 0 is a true statement, that means that there is an infinite number of solutions.

The solution is all real numbers.

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.

you can not drow on this

step-by-step explanation: