Question

1. Expand 7(3x-4y)

2. If a man drives at an average speed of 40 mph and travels 20miles, how long does it take

Answer 1

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Answer:

1. 21x -28y
2. 30 minutes

Explanation:

1. The distributive property tells you the factor outside parentheses multiplies each of the term inside parentheses.

7(3x -4y) = 7·3x -7·4y = 21x -28y

__

2. Time, speed, and distance are related by ...

time = distance/speed

time = (20 mi)/(40 mi/h) = 1/2 h = 30 minutes

The drive takes 30 minutes.