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Alex
3 years ago
8

Select the expression equivalent to (-2x+8.1y)-(-9x+5.3y)

Mathematics
1 answer:
Volgvan3 years ago
3 0

Answer:

D

Step-by-step explanation:

-2x+8.1y

+9x-5.3y

________

get the answer 7x+2.8y

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Mary walks from comer D to comer E to comer F on a city block that measures 264 feet wide and 900 feet long. Kate walks
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Answer:

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Step-by-step explanation:

By applying Pythagoras theorem in right ΔDEF,

(DE)² + (EF)² = (DF)²

By substituting DE = 264 feet and EF = 900 feet

(264)² + (900)² = (DF)²

DF = √(69696+810000)

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     = 937.92

Distance traveled by Kate diagonally = 938 feet

Distance traveled by Mary = DE + EF

                                            = 264 + 900

                                            = 1164 feet

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= 1164 - 937.92

= 226.07

≈ 226 feet

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