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3 years ago

8

An unknown polynomial is added to the expression -3x^3+2x-5 and the resulting sum is 4x^3+7x^2-3. what is the unknown polynomial

?

1 answer:

DENIUS [597]3 years ago

8 0

Answer:

7x³ + 7x² + 2x - 8

Step-by-step explanation:

Let the unknown polynomial be a

a + -3x³ + 2x - 5 = 4x³ + 7x² - 3

a = 4x³ + 7x² - 3 - (-3x³ + 2x - 5)

a = 4x³ + 7x² - 3 + 3x³ + 2x - 5

a = 7x³ + 7x² + 2x - 8

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2x - 2y = 6 3x + 2y = 9 Solve the system of equations. A) x = 0, y = 3 B) x = 3, y = 0 C) x = 1, y = -2 D) x = -2, y = 1 E) x =

son4ous [18]

<h2>Answer:</h2>

There are 2 ways to solve this system: by elimination or by graphing. I will solve it by elimination. First will solve for x.

$2x - 2y = 6\\3x + 2y = 9\\\\5x = 15\\\\x = 3\\$

Now we will solve for y using what we got for x.

$2(3) - 2y = 6\\\\6 - 2y = 6\\\\-2y = 0\\\\y = 0$

Solution:

A: $(0, 3)$

3 0

2 years ago

Great Falls is at approximately 47.5 degrees N, and 111.3 degrees W. Lemhi is approximately 45.5 degrees N, and 113.5 degrees W.

natka813 [3]

Answer:

The angle between Great Falls and Lemhi is approximately 3.02°

Step-by-step explanation:

The location parameters are;

The Great Falls location = 47.5° N, 111.3° W

The location of Lemhi = 45.5 °N and 113.5 °W

Therefore, we have;

The angle between the Great Falls and the poles, AP = 90° - 47.5° = 42.5°

The angle between Lemhi and the poles, PB = 90° - 45.5° = 44.5°

The angle between the lines of longitude, P = 113.5° - 113° = 0.5°

By the law of cosines for Sides of a spherical triangle, we have;

CosAB = cos AP·cosPB + sinAP·sinPB·cosP

Where;

AB = The angle between Great Falls and Lemhi

∴ CosAB = cos(47.5°) × cos(44.5°) + sin(47.5°) × sin(44.5°) × cos(0.5°) ≈ 0.9986

AB ≈ arccos(0.9986) ≈ 3.02°

The angle between Great Falls and Lemhi ≈ 3.02°

5 0

3 years ago

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BigorU [14]

Answer:

15

Step-by-step explanation:

a2+b2=c2

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3 years ago

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elena55 [62]

Answer:

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Step-by-step explanation:

i did -80-8 =-88 and to make sure you do -88+8 and you get 80 so -88 is the distance between -80 and 8

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3 years ago

Simplify the following 3^2 x 3^2

Pepsi [2]

Answer: 81

Step-by-step explanation:

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2 years ago

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