There are 5 people in a raffle drawing. Two raffle winners each win gift cards Each gift card is the same How many ways are there to choose the winners? Decide if the situation involves a permutation or combination, and then find the number of ways to choose the winners. Combination;number of ways=10

Permutation; number of ways =10

Combination;number of ways=20

Permutation; number of ways =20
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What is the prime factorization of 195

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.

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.