3 years ago

♪ Quiz ♪

Mathematics

2 answers:

andreev551 [17]3 years ago

8 0

Answer:

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Arisa [49]3 years ago

5 0

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Isabel drove 864 miles in 12 hours.<br> At the same rate, how many miles would she drive in 7 hours?

lyudmila [28]

Answer:

504 miles

Step-by-step explanation:

Make a proportion

$\frac{864}{12}$ = $\frac{x}{7}$

7/12 is 0.5833, so multiply 864 by that to find the number of miles

864(0.5833) = 504

6 0

3 years ago

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Leokris [45]

416.25

375*.11=41.25

41.25+375=416.25

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3 years ago

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Simpifly (-5x2 - 3x - 7) + (-2x3 + 6x2 - 8)

ioda

Answer:

-2x³ + x² - 3x - 15

Step-by-step explanation:

Simply combine like terms together:

-5x² - 3x - 7 - 2x³ + 6x² - 8

-2x³ + (-5x² + 6x²) - 3x + (-7 - 8)

-2x³ + x² - 3x + (-7 - 8)

-2x³ + x² - 3x - 15

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3 years ago

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What is the number if 50% of 25% of the number is 96

tamaranim1 [39]

Answer:

Step-by-step explanation:

the number is 96

hence,

25% of 96=

25/100*96/1

=24

50% of 24=

50/100*24/1=

it also possible that you're to sum them,but since you were not asked for the sum of the number the answer is 12.

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3 years ago

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Why is cos(nπ) = (–1)n true, when n could be any integer?

rodikova [14]

its true because -1 to even power is positive, -1 to odd power is negative

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4 years ago

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