Consider rectangle abcd (not shown) with ab=30 and bc=16. if m and n are the midpoints of sides ab¯¯¯¯¯ and bc¯¯¯¯¯ respectively, find mn.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64