What is the sum of this image?

1. 0.137

2.0.284 I'm not sure maybe it is.

0.421

Step-by-step explanation:

Tenths = 0.1

Hundredths = 0.01

Thousandths = 0.001

In the first image, there is 1 tenth, 3 hundredths, and 7 thousandths, making it 0.137.

The second image is 2 tenths, 8 hundredths, and 4 thousandths, making it 0.284.

Adding these two numbers will give you 0.421.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

if you was gonna solve for a, a is a   < -12