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2 years ago

Evaluate the expression below when x = 7 and y = 8. 5x2−3y

Mathematics

1 answer:

Ghella [55]2 years ago

5 0

Answer:

221

Step-by-step explanation:

Substitute x = 7 and y = 8 into the expression

5(7)² - 3(8)

= 5(49) - 24

= 245 - 24

= 221

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Answer:

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Step-by-step explanation:

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Answer:

combined variation

Step-by-step explanation:

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3 years ago

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If 5/8 yards of fabric costs 3.75 dollars what does one yard cost

Sladkaya [172]

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3 years ago

Determine the length of the longest metal rod which could be stored in a rectangle box 20 cm by 50 cm by 30 cm.

navik [9.2K]

Answer:

61.64 cm

Step-by-step explanation:

The longest metal rod which could be stored in a rectangular box will be equal to its diagonal:

$\therefore \: length \: of \:metal \: rod \\ = \sqrt{ {l}^{2} + {b}^{2} + {h}^{2} } \\ = \sqrt{ {20}^{2} + {50}^{2} + {30}^{2} } \\ = \sqrt{400 + 2500 + 900} \\ = \sqrt{3800} \\ = 61.64414 \\ = 61.64 \: cm$

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3 years ago

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