What is the answer for −0.8a−8=0.2a

I think the answer would be -80 but don't quote me on that lol

Step-by-step explanation:

-0.8a -8 = 0.2a

+0.8a       +0.8a

-8 = 0.10a

divide both sides by 0.10a

a = -80

80 = a

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.