Not a mf clue lololol

3.75

Step-by-step explanation:

Not sure hehe.Sry for that.

Your answer is 3.75 because when you count from 3.7 to 3.8 there are more points in between so there should be ten so in the middle is 3.75

(7x + 8) + (6x + 6) + (9x - 4 )

230mm

Step-by-step explanation:

(7x + 8) + (6x + 6) + (9x - 4 ); x = 10

(7(10) + 8) + (6(10) + 6) + (9(10) -4)

(70 + 8) + (60 + 6) + (90 - 4)

78 + 66 + 86

230