Cintia tem 18 anos e Fábio tem 9 anos a mais que ela. daqui a 2 anos as idades deles somarão: a)49 anos
b)45 anos
c)31 anos
d)47 anos ​

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

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation:

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

they used 313 gallons of paint