Question

i really need help on a qustion

Answer 1

you can get a ratio that the second shape was enlarged by, by writing the values
XY as a ratio to BC

8.4:4.2
this gives a factor of 2
therefore the value k=2(2.3)

Answer 2

so 4.6

Answer 3

you are going from large to small so you compare the small to the big as a ratio
12:16
6:8
3:4
therefore your scale factor is 3/4
since 16x=12
12/16=3/4

Answer 4

thanks alot do u have time to help me with 2 more