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3 years ago

Find the sum and choose the correct answer.

Mathematics

2 answers:

Alborosie3 years ago

5 0

B, n to the 3rd power + 4n to the 2nd power +8n -16

Alborosie3 years ago

5 0

Answer:

Option B (n³ + 4n² + 8n - 16)

Step-by-step explanation:

In this question we have to add two expressions given

( 2n³ + 4n² - 7 ) and ( -n³ + 8n - 9 )

( 2n³ + 4n² - 7 ) + ( -n³ + 8n - 9 )

Now we group the similar terms

( 2n³ - n³ ) + 4n² - ( 7 + 9 ) 8n

= n³ + 4n² - 16 + 8n

= n³ + 4n² + 8n - 16

Option B (n³ + 4n² + 8n - 16) is the correct answer.

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Assoli18 [71]

Answer:

B just did the test

Step-by-step explanation:

8 0

3 years ago

Calculate the distance between the two given point T(6,-2),U(-2,-12)

slava [35]

Use the distance formula: $\sqrt{(x2 - x1)^2 + (y2 - y1)^2}$

(6, -2), (-2, -12)
$\sqrt{(-2 - 6)^2 + (-12 - -2)^2}$ ⇒ $\sqrt{(-8)^2 + (-10)^2}$
$\sqrt{64 + 100}$ ⇒ $\sqrt{164}$
$\sqrt{164}$ = 12.8

The distance between points T and U is 12.8 units.

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2 years ago

BRAINLY CUP!!!! First to answer gets Brainliest and 50 points!

ArbitrLikvidat [17]

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7 0

3 years ago

Read 2 more answers

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Darya [45]

Answer:

216

Step-by-step explanation:

I'm sure there is a simpler way to do this but this is how I did it.

First divide 18 by 6 because it triples every 6 hours.

18/6=3

This means it will triple three times

Then triple the value three times

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In 18 hours the virus will infect 216 people.

6 0

2 years ago

4x + 11y = -3 and -6x = 18y - 6 (substitution method)

dolphi86 [110]

Answer:

-3 + -6= -9

because there is answer given

6 0

2 years ago