High School

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Luciano can type 190 words in 5 minutes. Which of the following ratios are in a proportional relationship with Luciano's typing speed?

Select all that apply.

A. 38/1

B. 74/2

C. 230/45

D. 290/105

E. 570/15

F. 950/25

Answer :

Answer:

  • 38/1
  • 570/15
  • 950/25

Step-by-step explanation:

The given rate, in words per minute, is ...

(190 words)/(5 min) = 38 words/min

The offered ratios are ...

38/1 = 38 . . . . proportional

74/2 = 37 . . . . NOT proportional

230/45 ≈ 5.11 . . . NOT proportional

290/105 ≈ 2.76 . . . NOT proportional

570/15 = 38 . . . . proportional

950/25 = 38 . . . . proportional

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