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3 years ago

PLZZZZZ HELP NO SPAM ANSWERS AND I WILL GIVE BRAINLIEST

Mathematics

2 answers:

lesya [120]3 years ago

6 0

Answer:

-10.4424

Step-by-step explanation:

i think, you might need to round

krek1111 [17]3 years ago

5 0

Answer:

<u>Given</u>:- x = 3 + √5 ; y = 3 - √5

<u>Expression</u>:- x² - 2xy + y²

(3 + √5)² - 2 × 3 + √5 × 3 - √5 + (3 - √5)²
9 + 5 + 6√5 - 2 × (3² - √5²) + 9 + 5 - 6√5
14 + 6√5 - 2 × (9 - 5) + 14 - 6√5
28 - 2 × 4
28 - 8
20

Hence, Value of expression x² - 2xy + y² is 20.

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drek231 [11]

Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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nadya68 [22]

Answer:

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Step-by-step explanation:

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Pregnant women metabolize some drugs at a slower rate than the rest of the population. The half-life of caffeine is about 4 hour

UkoKoshka [18]

Answer:

Husband:

The husband will have 16.35 mg of caffeine in his body at 7 pm.

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The pregnant woman will have 51.33 mg of caffeine in her body at 7 pm.

Step-by-step explanation:

The amount of caffeine in the body can be modeled by the following equation:

$C(t) = C(0)e^{rt}$

In which C(t) is the amount of caffeine t hours after 8 am, C(0) is how much coffee they took and r is the rate the the amount of caffeine decreases in their bodies.

110 mg of caffeine at 8 am,

So $C(0) = 110$