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zalisa [80]
2 years ago
14

1. Expand 7(3x-4y)

Mathematics
1 answer:
Lesechka [4]2 years ago
3 0

9514 1404 393

Answer:

  1. 21x -28y
  2. 30 minutes

Step-by-step 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.

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