pison3163

12.01.2020 • 

Mathematics

Michaela spent 5/6 of an hour reading on each of 3 days this week. she spent 3/4 of an hour on each of 2 days this week doing science. she spent 1/2 of an hour on each of 4 days this week doing math. milana said she spent 5 1/2 hours doing reading, math, and science this week. michaela said that she spent 2 1/2 hours doing reading, math, and science this week. who is correct? what mistake did someone make? explain your thinking and draw models to support your answer.

Ответ:

cheerleader791

14.01.2022

Mathematics

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5/6 of an hour is 50 min. So 50 times 3 equals 150 min for reading. 3/4 of an hour is 45 min. 45 times 2 equals 90 min for science. And 1/2 of an hour is 30 min. So 30 times 4 equals 120 mins for math. Add 150,90, and 120 min all together and you get 360 mins total. Divide 360 by 60, and you get 6 hours total that Michaela spent on reading, math, and science. Not 2 1/2.

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Ответ:

gungamer720

15.02.2022

Mathematics

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Responder:

x = 15/7

Explicação passo a passo:

Dada a equação:

7 x + 4 = 19

Subtraia 4 de ambos os lados

7x + 4 - 4 = 19 - 4

7x = 15

Divida os dois lados por 7

7x / 7 = 15/7

x = 15/7

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