What is he answer to this -15s + 12.81 = 15.71 − 13.5s + 17.2

Okay, so first we will need to combine like terms.

The like terms in the question are -15s and 13.5s.

Combining usually means addition. So you add -15s and 13.5s.

That would be -1.5s.

Now we need to combine the rest of the equation, and that would be 12.81 + 15.71 + 17.2

The answer to that would be 45.72

Now combine the two answers

-1.5s = 45.72

The next step is to divide each term by -1.5

-1.5 ÷ -1.5s would just leave us with s.

Now,

-1.5 ÷ 45.72 will be -30.48.

So you're answer is  s = -30.48

Hope this helped! :D

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.