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Karo-lina-s [1.5K]
2 years ago
15

I dont understand quadratic equations

Mathematics
2 answers:
Yanka [14]2 years ago
6 0
At least you must give a question that goes beyond your understanding?
MAVERICK [17]2 years ago
4 0
The quadratic equation produces a U shaped function; using the standard formula and the quadratic formula, you can understand quadratic equations.

quadratic equation:x =(<span><span>−b ± √(b^<span>2 </span>− 4ac))/</span>2a</span>
standard form: ax^2<span> + bx + c = 0</span>
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Expand and simplify (√10-√2)² Give your answer in the formn b-c√5 where b and c are integers
vesna_86 [32]

Answer:

12-4√5

Step-by-step explanation:

(√10-√2)²

(√10-√2)(√10-√2)

Foil/distribute

10-√20-√20+2

12-2√20

12-2√4*√5

12-2*2√5

12-4√5

5 0
2 years ago
1. Complete this statment: A polygon with all sides the same length is said to be____
Katen [24]

Answer:

Q1. Regular (A)

Q2. 105° (C)

Q3. x=45°

Step-by-step explanation:

Q1. A regular polygon is a polygon with all sides and angles equal.

Q2. The sum of the measure of exterior angles of a polygon is always 360°. Therefore,  360°-255°=105°

Q3. 148°+112°+(2x+10)°+(2x)°+90°= Sum of angles in a pentagon.

<u><em>Note</em></u>: The square at the fifth angle shows that its a right angle which is 90°. Also all the angles are equal to the sum of angles in a pentagon 'cause the polygon has 5 sides ( a pentagon).

Sum of interior angles of a polygon is: (n-2)180°. Where "n" is the number of sides of the polygon.

Therefore the sum of interior angles is (5-2)180°=540°

solving the equation you have;

360°+4x=540°

4x=540°-360°

4x=180°

x=180°/4

x=45°

therefore x=45°

8 0
3 years ago
5 The width of this rectangle is of the length. Find the
LenKa [72]

Answer:

4 in.

Step-by-step explanation:

8 0
3 years ago
A CD player holds 5 CDs, and each disc has 12 songs. If the CDs are changed randomly, find the probability that your favourite s
almond37 [142]

Answer:

1/(5*12) = 1/60 = .016 = 1.6%

Step-by-step explanation:

7 0
3 years ago
What are the total operating expenses? (This is line (c) on the income statement.)
snow_tiger [21]

Answer:

The answer to this question can be defined as follows:

Step-by-step explanation:

In this question some information is missing that's why we explain "operating expenses".  

The Operating costs are paid in the business transactions and include property taxes, materials, stock costs, marketing, salary, health coverage, and R&D investments.

  • For other companies, these expenses are unavoidable and made mandatory. This cost is primarily important because it helps to evaluate the price effectiveness of the company as well as its inventory control.
  • It also shows the costs and requires a consulting company needs to be making to maximize income, which would be a company's main objective.
7 0
3 years ago
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