D = mV + C , ( compare this to your familiar y = mx + b)
when V=40, D=150
150 = 40m + C **
when V=54, D=192
192 = 54m + C ***
subtract ** from ***
42 = 14m
m = 3
sub into ** , 150 = 120 + C
C = 30
so you have D = 3V + 30
sub in your given value of V
Answer:
I think the correct answer is D
Step-by-step explanation:
In this question , Darko have to find the distance between A(3,-4) and B (-1,3) .
He uses the correct formula, which is

And on substituting the values , we will get

And in this line, Darko did the mistake .
Answer:
34.5
Step-by-step explanation:
divide 145 by 4.2