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kogti [31]
3 years ago
6

Help I don’t understand the first part but understand the second

Mathematics
2 answers:
grandymaker [24]3 years ago
6 0

Answer:

<u>Complete the square:</u>

  • x² + 2x - 13 = 0
  • x² + 2x + 1  - 14 = 0
  • (x + 1)² - 14 = 0
  • (x + 1)² = 14
  • x + 1 = ± √14
  • x = -1 ± 3.74
  • x =  2.74, x = -4.74
Lunna [17]3 years ago
4 0

Answer:

Step-by-step explanation:

Complete the square

x^{2} + 2x - 13 = 0

x^{2} + 2x        = 13

x^{2} + 2x + 1^{2} = 13 +1 (take 1/2 of the b term , the 2 )

x^{2} + 2x + 1 = 14

(x +1)^2 = 14

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HELP QUICK GIVING 50 POINTS!!!
avanturin [10]

Answer:

64/3 cc or 64/3 cm³

Step-by-step explanation:

The formula for the volume of a triangular pyramid is

V = (1/3)(area of base)(height)

Here we have a square prism (actually, a cube), whose square base is 4 cm by 4 cm (4 cm is the cube root of 64 cc).  The height of this cube is also 4 cm.

The volume of a triangular pyramid of base area (4 cm)² and height 4 cm is

V = (1/3)(base area)(height)

   = (1/3)(16 cm²)(4 cm) = 64/3 cc

8 0
3 years ago
If 0.65 AU equal 1 inch how much would 0.05 AU equal and explain.
mart [117]

Answer:

0.05 AU corresponds to the 0.0769 Inches(<em>This calculation is not possible in real time world)</em>

Step-by-step explanation:

Given:

0.65 corresponds to 1 inch

To Find:

0.05 AU corresponds to how many inches.

Solution:

<em>The AU is astronomical unit which is preferred as the mean distance between  earth and sun.</em>

<em>AU is too big unit and used in space distance calculation.</em>

But here for  mathematical calculation,

0.65 AU corresponds to 1 inch

then 0.05 AU corresponds to  x inch(es)

Now cross multiplying the quantities we get ,

0.65x=0.05*1

x=0.05/0.65

x=0.0769 inches corresponds to 0.05 AU

(Preferred for this example only)

<em>(Remember that this calculation is hypothetical and practically incorrect to use it).</em>

<em />

8 0
3 years ago
Look at the pic and please help do only number 3 please
Effectus [21]
They must have the same solution because they are doubled from eachother
5 0
3 years ago
Simplify: 6-4[3(2x+5)-4x]
Degger [83]
[- 12 - 8x +5 16x]+ 6
7 0
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siniylev [52]

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Step-by-step explanation:

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