Can someone please answer this question please answer it correctly please show work

It would be 5.

Let's call the unknown value "x." To solve this, just add 9 to both sides of the equation.

The reason for adding 9 to both sides is to cancel out the -9 on the side with the unknown value, this would give you the answer once simplified in this way.

-4 = __ - 9

-4 = x - 9

-4 +9 = x - 9+9

5 = x

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

i dont get the question

step-by-step explanation: