Find the common difference (d), then find the indicated term of the sequence.
-2, -9,-16, -23, ... find the 19th term

-128

Step-by-step explanation:

d= 2 term - first term = -9 - (-2) = -9 + 2 = -7

a= -2

nth term = a + (n-1)*d

19th term = -2 + (19-1)* (-7)

= -2 + 18 * (-7)

= -2 - 126

=  -128

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

step-by-step explanation: