(a) Joe runs 12 miles in 84 minutes. How many miles does he run per minute?
İmiles per minute

Step-by-step explanation:

We want to find how many miles per minute Joe runs. This means, we need to simplify the equation:

so that the number on the bottom is 1. How do we do that?

Simple.

Just divide 12 / 84

Joe runs approx. 0.143 miles per minute.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl