John is 14 years older than Sam and the product of their ages is 240. How old is Sam? A. 10 years old
B. 9 years old
C. 24 years old
D. 12 years

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

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.