12х+3y=74 and 4x+12y=724 solve for the solution to the system

(-9.7,63.6)

Step-by-step explanation:

12x + 3y = 74

4x + 12y = 724

x + 3y = 181

3y = -12x + 74

3y = -x + 181

-12x + 74 = -x + 181

-11x = 107

x = -9.7

-9.7 + 3y = 181

3y = 190.7

y = 63.6

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk

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