The two rectangles above are similar. If b = 21 mm, and c = 26 mm, and d = 39 mm, what is the length of a?
A. 12 mm
B. 7 mm
C. 14 mm
D. 17 mm

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35