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Cerrena [4.2K]
3 years ago
8

How to solve absolute value 2|x+9|+3=7

Mathematics
1 answer:
ollegr [7]3 years ago
3 0

Answer:

x = -7, -11

Step-by-step explanation:

2|x+9|+3 = 7

subtract 3 from both sides of equation

2|x+9| = 4

divide 2 from both sides of equation

|x+9| = 2

Absolute values:

x+9 = 2 and x+9 = -2

   x = -7 and     x = -11

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The vector v in 2-space of length 3 pointing up at an angle of π/4 measured from the positive x-axis is: (3/√2, 3√2) and The vector w in 3-space of length 1 lying in the yz-plane pointing upward at an angle of 2π/3 measured from the positive y-axis is: (0, -1/2, √3/2).

<h3>Vector</h3>

a. Vector (v)

Vector (v)=v (cos Ф, sin Ф)

V=1 while the counterclockwise angle that is measured from positive x=Ф=π/4

Hence:

Vector=3(cos π/4, sinπ/4)

Vector=(3/√2, 3√2)

b. Vector w:

Vector w=1(0, cos 2π/3, sin2π/3)

Vector w=(0, -1/2, √3/2)

Therefore the vector v in 2-space of length 3 pointing up at an angle of π/4 measured from the positive x-axis is: (3/√2, 3√2) and The vector ws: (0, -1/2, √3/2).

The complete question is:

Resolve the following vectors into components:

a. The vector v in 2-space of length 3 pointing up at an angle of π/4 measured from the positive x-axis.

(b) The vector w in 3-space of length 1 lying in the yz-plane pointing upward at an angle of 2π/3 measured from the positive y-axis.

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Step-by-step explanation:

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3 years ago
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104

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Step-by-step explanation:

Given

x² - 8x + 5

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add/subtract ( half the coefficient of the x- term)² to x² - 8x

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