How do I solve this
3-7+2-[13-17-1.3]+5

8.3

Step-by-step explanation:

do whats in the brackets first.

13-17-1.3= -5.3

rewrite the equation

3-7+2-[-5.3]+5

3-7+2= -2

rewrite the equation

-2-[-5.3]+5

when 2 negative signs are together u change it to a positive sign.

rewrite the equation

-2+5.3+5

-2+5.3= 3.3

rewrite the equation

3.3+5=8.3

step-by-step explanation:

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