I will give brainliest, if it is right, and you are the first person to answer. A scale drawing has a scale of 2 cm : 21 km. Find the actual length for a drawing length of 4.5 cm.

41.4 km

47.25 km

35.8 km

23.5 km
sorry I ask so many questions, I hate this topic in math, tysm

47.25

Step-by-step explanation: it is 10.5 x the 4.5

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

i think the answer is b