statement justification
line bc is parallel to line ed given
m∠abc = 70° given
m∠ced = 30° given
m∠abc = m∠bed corresponding angles theorem
m∠bec + m∠ced = m∠bed angle addition postulate
(missing)
m∠bec = 40° subtraction property of equality
a. m∠bec + 30° =70°; substitution property of equality
b. m∠bec + 30° = 70°; addition property of equality

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

inverse operation of addition

i'm pretty sure the answer is a. decreases with increase in