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Victor789
27.01.2023 23:06
Математика
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9) a) Find the surface area of this right rectangular prism. 420 m²
a.
b. 300 m²2
c. 600 m²
d. 480 m²
15 m
6 m
10 m
b) Marcelo has a bag that contains 3 red, 1 blue, 6 green, and 2
yellow marbles. What fractional part of the bag of marbles is red?

102
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Ответы на вопрос:

вероника1062
вероника1062
4,5(54 оценок)

a) The surface area of a right rectangular prism is given by the formula `2lw + 2lh + 2wh`, where `l`, `w`, and `h` are the length, width, and height of the prism respectively. Plugging in the values for this prism, we get `2(15)(6) + 2(15)(10) + 2(6)(10) = 180 + 300 + 120 = 600`. So the surface area of this right rectangular prism is **600 m²**.

b) Marcelo has a total of `3 + 1 + 6 + 2 = 12` marbles in his bag. The fractional part of the bag that is red is `3/12` which can be simplified to **1/4**.

soykaalayaovpiyg
soykaalayaovpiyg
4,6(52 оценок)

ответ:

пошаговое объяснение:

первый пример:

1) 33/30 = 11/10

2) 11/10 - 4/5 = 11/10 - 8/10 = 3/10

3) 3/10 * 2 2/9 = 3/10 * 20/9 = 3*20/10*9 = 2/3

4) 2/3 + 2/5 = 10/15 + 6/15 = 16/15 = 1   1/15

ответ: 1   1/15

второй пример:

1) 4 : 4 4/5 = 4 : 24/5 = 4 * 5/24 = 5/6

2) 2 2/7 * 5 1/4 = 16/7 * 21/4 =16*21/7*4 = 4*3 = 12

3) 5/6   + 12 = 12   5/6

4) 12   5/6 - 7   11/12 = 12   10/12 - 7   11/12 = 11   22/12 - 7 11/12 = 4   11/12

ответ: 4   11/12

третий пример:

1) 48/45 = 16/15

2) 16/15 - 1/3 = 16/15 - 5/15 = 11/15

3) 11/15 * 2   1/11 = 11/15 * 23/11 = 11*23/15*11 = 23/15 = 1   8/15

4) 3   2/9 - 1   8/15 = 3 10/45 - 1 24/45 = 2   55/45 - 1 24/45 = 1   31/45

ответ: 1   31/45

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