Mrs. Stevens is wanting to buy new border for her Math bulletin board in the hallway. The length of the board is 6.9 meters. The width is 4.3 meters. How much border does Mrs. Stevens need to buy? A. 2.6 m
B. 11.2 m
C. 22.4 m
D. 44.6 m

it b

Step-by-step explanation:

because 4.3+6.9 eguals 11.2

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have