Which property of equality was used to solve this equation? X - 5 = -14 X-5 + 5 = -14 + 5 x = -9 А. addition property of equality B subtraction property of equality C. multiplication property of equality D division property of equality

addition property of equality

Step-by-step  explanation:

In the second step, they added 5 to both sides to get rid of the -5 on the left side. Since the same thing was done to both sides (addition), the answer isthe addition property of equality.

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

x = 23.78

step-by-step explanation: