Hi just wanted to know if 4/17 is a rational number or not. I think it's irrational because the decimals are unending different sets of numbers and a type of number that can not be put into fraction. But, savemyexams says its a rational number because its decimal is 0.23, but I checked the calculator, unless a characteristic of a rational number is to be able to turn it into decimal.. (but so can pie- 3.14,)

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.