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ELEN [110]
3 years ago
8

What number should be added to both sides to complete the square? x^2 + 8x = 4

Mathematics
1 answer:
son4ous [18]3 years ago
8 0

Answer:

16

Step-by-step explanation:

x² + 8x = 4 ⇔ x² + 8x + 16 = 4 + 16 ⇔ x² + 2×4x + 4² = 20 ⇔ (x + 4)² = (2√5)²

Remark : (2√5)² = 20

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PLEASE HELP ASAP WILL MARK BRAINLIEST
nikdorinn [45]

Answer: 314 mm

Step-by-step explanation:

Area of a circle is π*r^2

r is radius and π is 3.14

here the radius is 10

3.14 * 10^2 = 3.14 * 100 = 314

3 0
2 years ago
The outside world recoils in fear
Alexeev081 [22]

Answer:

liar! only 5 points! SU  LITERALLY IDC REMOVE UR ANSWER OR ELSE THUG

Step-by-step explanation:

3 0
2 years ago
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Question 3.3. Find the LCD of these fractions.
Yakvenalex [24]
Did you ever get an answer?
7 0
3 years ago
What is the local minimum value of the function? (Round answer to the nearest hundredth) g(x)=x^4-5x^2+4
Serhud [2]
The local minimum of function is an argument x for which the first derivative of function g(x) is equal to zero, so:
g'(x)=0
g'(x)=(x^4-5x^2+4)'=4x^3-10x=0
x(4x^2-10)=0
x=0 or 4x^2-10=0
4x^2-10=0 /4
x^2-10/4=0
x^2-5/2=0
[x-sqrt(5/2)][x+sqrt(5/2)]=0

Now we have to check wchich argument gives the minimum value from x=0, x=sqrt(5/2) and x=-sqrt(5/2).
g(0)=4
g(sqrt(5/2))=25/4-5*5/2+4=4-25/4=-9/4
g(-sqrt(5/2))=-9/4
The answer is sqrt(5/2) and -sqrt(5/2).

4 0
3 years ago
Read 2 more answers
A piece of copper wire of length 200 m has a diameter of 1.2 mm.
vova2212 [387]

The volume of the copper wire is 226.080 cm³ and the mass of the wire is 2,012.112 g/cm³.

Given that, the length of copper wire=200 m=200000 mm and the diameter of the copper wire=1.2 mm.

We need to find the volume of the copper wire.

<h3>What is the formula to find the volume of the cylinder?</h3>

The formula to find the volume of a cylinder is πr²h.

Now, the volume of the copper wire=πr²h=\frac{22}{7} \times (0.6)^{2} \times 200000=2,26,080 mm³=226.080 cm³

If the density of copper is 8.9 g/cm³, find the mass of the wire.

We know that Density=\frac{Mass}{Volume} }.

⇒8.9 g/cm³=\frac{Mass}{226.080}

⇒Mass=2,012.112 g/cm³

Therefore, the volume of the copper wire is 226.080 cm³ and the mass of the wire is 2,012.112 g/cm³.

To learn more about the volume of the cylinder visit:

brainly.com/question/16134180.

#SPJ1

6 0
2 years ago
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