Question

http://prntscr.com/6tcva6

Answer 1

@myininaya

Answer 2

simplify
\(\Large\dfrac{12}{21}\)
hint: divide by 3

Answer 3

@Great_And_Powerful ?

Answer 4

??

Answer 5

12 / 3 and 21/3

Answer 6

ohh ok

Answer 7

so you get what?

Answer 8

4 and 7

Answer 9

The scale factor is the number by which you multiply a length of the original figure to get the corresponding length in the final figure.

You are given two corresponding lengths: 21 and 12.
21 was the original length, and 12 is the final corresponding length.
Call the scale factor s.
Then
21s = 12
Solve for s:

\(s = \dfrac{12}{21}\)

Now you need to reduce the fraction.

Answer 10

so \(\Large\dfrac{4}{7}\)

Answer 11

Thanks!

Answer 12

Give @mathstudent55 a medal please @Mehek14

Answer 13

i did...

Answer 14

k thanks ^-^

Answer 15

\(s = \dfrac{12}{21} = \dfrac{\color{red}{3} \times 4}{\color{red}{3} \times 7} = \color{red}{\dfrac{3}{3}} \times \dfrac{4}{7}
= \color{red}{1} \times \dfrac{4}{7} = \dfrac{4}{7}\)

Answer 16

@Great_And_Powerful , @Mehek14
Thanks!