You are taking a test in math. There are 20 questions and 30 minutes. How many questions do you have for 12 minutes?
questions

How much time do you have for 15 questions?
minutes

How much time do you have for 5 questions?
minutes

What is the square root of 45? (step by step working plz)

In the rectangle below ac=30 units what is de

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.