Would be appreciated! how do you know which inverse operation to perform first when an equation contains two operations?

With an equation you must isolate x or whatever the variable is. Operations are the things used to make the difference like +,-,x,/.

A great example of this is the following

4x-12=0

First add 12 to both sides making the equation go to

4x=12

now divide 4 from both sides making

x=3

with the equation 12=10-3x: you would have to get rid of 10 first because 3 has a variable next to it so you would do inverse operation witch you add 10 to 12 and will get you 22 now you divide 3 because the inverse operation of multiplying is dividing and x will equal 7.3

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6