Andrea's rock collection has 25 fewer rocks than claudia's collection. andrea's collection contains 125 rocks. which equation can be used to calculate how many rocks are in claudia's collection? let the variable r stand for the number of rocks in claudia's collection.

a.125 = r -25

b.125 -25 = r

c.25 - r =125

d.125 = r + 25

i need the answer asap

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3