<u>Answer:</u>
○ 
<u>Explanation:</u>
<h3>What is a quadratic equation?</h3>
A quadratic equation is an algebraic equation where the highest power of 
is 2. The general form of a quadratic equation is as follows:
,
where <em>a</em>, <em>b</em>, and <em>c</em> represent known constants, and is the unknown.
In this question, if you take a look at the second option, you will see that it is possible to rearrange the equation to make it look the general form:
⇒ 
Therefore, this equation is quadratic.
The other three options are not quadratic equations because none of them have an 
term in them.
Answer:
The answer is that the vertex is: (1, 0)
Step-by-step explanation:
Use the "Completing the Square Method":
(x - h)^2 - k = 0, the vertex is (h, -k)
Complete the square:
x^2 + 2x + 1 = 0
x^2 + 2x = -1
(2/2)^2 = 1, add 1 to both sides of the equation.
x^2 + 2x + 1 = -1 + 1
(x + 1)^2 = 0
(x + 1)^2 - 0 = 0 (Just to put a placeholder in for he -k)
The vertex is (1, 0)
Answer: x = 4
Step-by-step explanation:
To solve this problem, make use of the fact that you may add anything to an equation, as long as you do it to both sides.
Simply add 4x to both sides to get:
13 = 1 + 3x
Then simply add -1 to both sides to get:
12 = 3x
Then, divide both sides by 3 to get:
4 = x
Hope it helps :) and let me know if you want me to elaborate.
Answer: hope this helps
Step-by-step explanation: 360
Answer:
The final net price of a designer swimsuit is 
Step-by-step explanation:
Let
x-----> the final net price of a designer swimsuit
we know that
![x=\$85[1-\frac{25}{60}]](https://tex.z-dn.net/?f=x%3D%5C%2485%5B1-%5Cfrac%7B25%7D%7B60%7D%5D)
![x=\$85[\frac{35}{60}]](https://tex.z-dn.net/?f=x%3D%5C%2485%5B%5Cfrac%7B35%7D%7B60%7D%5D)
