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icang [17]
3 years ago
8

Which of the following is equal to

Mathematics
1 answer:
Tanzania [10]3 years ago
8 0

Answer:  2x^3-2x^2-13x+3

======================================================

Work Shown:

I'm assuming you meant to say (x - 3)(2x^2 + 4x - 1)

Let y = x-3

So,

(x - 3)(2x^2 + 4x - 1)\\\\y(2x^2 + 4x - 1)\\\\y2x^2 + y4x - y\\\\2x^2(y) + 4x(y) - (y)\\\\2x^2(x-3) + 4x(x-3) - (x-3)\\\\2x^3-6x^2 + 4x^2-12x - x+3\\\\2x^3-2x^2-13x+3\\\\

The basic idea is to use the distribution rule (line 3 and line 6) and then combine like terms.

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Solve for x
mr Goodwill [35]

Answer:

Option (2). x = 20°

Step-by-step explanation:

In the figure attached,

ΔABC is an equilateral triangle.

By the property of equilateral triangle, all sides of the triangle are equal and measure of all angles of the triangle is 60°.

By this property,

m∠B = 60°

and y = 46 - 16 = 30

By applying Sine rule in ΔBCD,

\frac{\text{sin}60}{BD}=\frac{\text{sin}80}{46}=\frac{\text{sin}(\angle CBD)}{DC}

\frac{\text{sin}80}{46}=\frac{\text{sin}(\angle CBD)}{y}

sin(∠CBD) = \frac{30\times \text{sin}80}{46}

                 = 0.6423

m∠CBD = 39.96

              ≈ 40°

m∠ABD = 60° - 40°

             = 20°

Therefore, Option (2). 20° will be the answer.

5 0
3 years ago
My sister is 2 years older than I am. The sum of our ages is 32. Find our ages.
VikaD [51]
Lets call your age x and your sisters would be x +2
x + x + 2 = 32
combine like terms
2x + 2 = 32
32 - 2 = 2x
32 - 2 = 30
2x = 30 
x = 15

Your age is 15 and your sisters is 17

<span>Hope This Helps You!
</span>Good Luck Studying :)
4 0
3 years ago
Read 2 more answers
Use the elimination method to solve the system of equations. Choose the correct ordered pair. 5x - 2y = 9 3x + 4y = - 5 O A. (5,
marta [7]

Answer:

Step-by-step explanation:

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-2(3x+4y=-5)

20-20x-8y=36

+6x-6x-8y=10

36-20x=10+6x-6x

36-36-20x-6x=10

-26x=10-36

-26x/-26=-26/-26

x=1

3 0
3 years ago
Please help ASAPPPP!!!
mote1985 [20]
First one.

tan(pi/2) is the asymptote, and 2pi/4*x = pi/2*x, between 0<x<2, goes from 0 to pi, so it only passes thru pi/2.

FIRST one
4 0
3 years ago
What are the steps to GOMDAS?
Nikitich [7]
Do u mean pemdas if so 
Parenthasis
Exponents
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8 0
4 years ago
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