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3 years ago

Please help me with Alegbra 2!! Solve x2 + 4x + 1 = 0.

2 answers:

7 0

$x^2+4x+1=0\\\\\underbrace{x^2+2x\cdot2+2^2}_{(x+2)^2}-2^2+1=0\\\\use\ (a+b)^2=a^2+2ab+b^2\\\\(x+2)^2-4+1=0\\\\(x+2)^2-3=0\\\\(x+2)^2=3\iff x+2=\sqrt3\ or\ x+2=-\sqrt3\\\\\boxed{x=\sqrt3-2\ or\ x=-2-\sqrt3}$

IceJOKER [234]3 years ago

5 0

Answer:

C on edgenunity

Step-by-step explanation:

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The system of equations 2y = 14 - 2x and y=-x+ 7 is

Ratling [72]

Answer:

Infinitely many solutions

Step-by-step explanation:

2y=14-2x

y=-x+7

------------

2(-x+7)=14-2x

-2x+14=14-2x

-2x-(-2x)=14-14

-2x+2x=0

0=0

infinitely many solutions

6 0

3 years ago

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Steven tiene un tapete rectangular con un perímetro de 16 pies.y el ancho del tapete es 5 pies Cual es la longitud del tapete? n

Sunny_sXe [5.5K]

Answer:

$l = 3\,ft$

Step-by-step explanation:

La ecuación de perímetro del tapete es (The equation of perimeter of the carpet is):

$p = 2\cdot (w + l)$

Donde (Where):

$w$ - Ancho (Width)

$l$ - Longitud (Length)

La longitud se determina por despeje (The length is determined by clearing it):

$l = \frac{p}{2} - w$

$l = \frac{16\,ft}{2} - 5\,ft$

$l = 3\,ft$

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3 years ago

At a bead store, glass beads cost $2.85 per ounce. What is the price for 8.6 ounces of glass beads?

Zielflug [23.3K]

(2.85)(8.6) = $24.51

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3 years ago

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Item 14 A student solves the inequality −6v>42. Each step in the student's solution is shown below. Identify where the studen

Marizza181 [45]

Answer:

Step-by-step explanation:

Given the inequality solved by a student expressed as:

-6v>42

To get v, follow the simple steps

Step 1: multiply both sides by -1

-6v>42

-1(-6v)<-1(42)

6v < 42 (Note that when you multiply both sides of an inequality by a negative sign, the inequality sign will change)

Step 2: Divide through by 6

6v < 42

6v/6 < 42/6

v < 7

Hence the range of values of v are the values of v less than 7

Since we are not given the options, you can compare the solution given with that of the student to figure out the error. The major error that may happen is the different not changing the inequality sign after multiplying or dividing with a negative value as shown.

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2 years ago

What is the slope of the line passing through points A and B?

masya89 [10]

Answer: 2/4 simplified to 1/2

Step-by-step explanation:

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2 years ago

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