Monifer used substitution to solve this system of equations. Which equation could be the result of her
first step?
3a + b = 225
b = a - 15

options:
3a + a = 225
3a + a - 15 = 225
b= 3a + b
3a + b = a - 15

Me! i'm really confused the isosceles trapezoids, abcd and efgh, are similar quadrilaterals. the scale factor between the trapezoids is 2: 3, line gh = 6 centimeters, line ad = 8 centimeters, and line ab is three times the length of line dc . use complete sentences to answer the following prompts and include all of your calculations in your final answer. a. write a similarity statement for each of the four pair of corresponding sides. b. write a congruence statement for each of the four pair of corresponding angles. c. determine the perimeter for each of the isosceles trapezoids.