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BomgGang
BomgGang
16.01.2023 19:38 •  Математика

Решите .кто первый тому . известно, что график прямой пропорциональности проходит через точку а (3: 21).проходит ли этот график через точку в (-7: -49),точку с (-5: 3,5: ),точку d(08: -5,6)​

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Ответ:
Polina300696
Polina300696
16.01.2023

да,нет,нет

Пошаговое объяснение:

у=ах

21=а*3

а=7

у=7х

В  -49=7*(-7)

    -49=-49  проходит

С   3,5=7*(-5)

     3,5=-35       не проходит

Д   -5,6=7*0,8

     -5,6=5,6      не проходит

4,4(45 оценок)
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Ответ:
tseng7788
tseng7788
16.01.2023

Пошаговое объяснение:

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4,6(44 оценок)
Ответ:
domna0404
domna0404
16.01.2023

В решении.

Пошаговое объяснение:

Расстояние по трассе между двумя посёлками 1540 м. Из этих посёлков одновременно навстречу друг другу выехали два велосипедиста. Скорость первого равна 3 м/с, скорость второго 4 м/с. Какое расстояние будет между велосипедистами через 3 мин после начала движения? Через какое время после начала движения велосипедисты встретятся?

Формула движения: S=v*t

S - расстояние            v - скорость             t – время

3 минуты=60*3=180 секунд.

1)Найти расстояние 1 велосипедиста:

3*180=540 (м).

2)Найти расстояние 2 велосипедиста:

4*180=720 (м).

3)Какое расстояние будет между велосипедистами через 3 мин после начала движения?

1540 - (540+720)= 280 (м).

4)Через какое время после начала движения велосипедисты встретятся?

Общее расстояние 1540 м.

Общая скорость 3+4=7 (м/сек).

Общее время: 1540 : 7 = 220 (сек.)

4,5(21 оценок)
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