What is the value of 5 x(s+t) when s+t=289?

1445

Step-by-step explanation:

5 × (s+t)

Where s+t = 289

Then 5 × (s + t)

= 5× 289

= 1445

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

answer: x=60