A.
It is going up as you go right so it is positive and they are pretty much clumped up in a line.
For this question you have to solve the equation backwards.
A = 1/2 x (b1 + b2) x h
In order to get rid of the 1/2 (since it's division) multiply each side by 2
now we have: 2A = (b1 + b2) x h
Now do the same to the get rid of the (b1 + b2) (divide each side by it)
2A/(b1 + b2) = h
<span>the answer: the following methods are the main rule according to the convertions
we know this followin table: km hm dam m dm cm mm. if we want to change or convert any value, cm to meters, meters to km, or anything else, just follow this:
converting dm (decimeter) to m, just multiply the number by 0.1,
converting cm (centimeter) to m, just multiply the number by 0.01,
converting mm (millimeter) to m, just multiply the number by 0.001,
in our case, we have:
convert 10.5cm to meters, so it is 10.5 x 0.01 =0.105 meters</span>
