A parallelogram has two pairs of opposite equal angles.
ABCD so
A = C and B = D
A = 2x + 35
C = 3x - 5
2x + 35 = 3x - 5
35 + 5 = 3x - 2x
40 = x
A = (2 x 40) + 35 = 115
A = C = 115
Sum of angles of a quadrilateral = 360
Angles B and D are equal
So
B = (360 - (115 + 115))/ 2
= 130/2
= 65
B = D = 65
Answer: r = -5/18
Step-by-step explanation: You solve -3(1+6r)+12=14
-3-18r+12=14 (When distributed)
-18r+9=14
-18r=5
r=-5/18
#17: is 6
#18: is 30
#19: is 3.75
2,3,5,7,11,13,16,17,19,23,27,31,37,