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Oksanka [162]
4 years ago
10

How do you solve an equation by completing the square? Example:

D-8" id="TexFormula1" title=" x^{2}+6x=-8" alt=" x^{2}+6x=-8" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Serga [27]4 years ago
7 0
X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2,  x₂=-4
bixtya [17]4 years ago
7 0
x^2+6x=-8\\
x^2+6x+9=1\\
(x+3)^2=1\\
x+3=1 \vee x+3=-1\\
x=-2 \vee x=-4
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Add or subtract the following mixed numbers using the first method. Be sure your answers are in mixed number format and reduced
Paraphin [41]
We have the number here are 3 3/8 and 2 1/6
by using the first method,
multiplying 3/8 with 3/3 and 1/6 with 4/4 we get 9/24 and 4/24 so,
3 9/24 + 2 4/24 = (3+2) and (9/24 + 4/24)
when adding 3 and 2 we get 5 and adding 9/24 and 4/24 we get 13/24
so the answer is 5 and 13/24
5 0
3 years ago
There are 25 servings in a 30.2-ounce jar of peanut butter. How many ounces of peanut butter are there in 1
Wewaii [24]
There should be 1.208 ounces of peanut butter in one serving. Since we are finding how many ounces in a serving, we divide from 30.2. 30.2 divided by 25 should be 1.208 ounces. :) I hope this helped
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3 years ago
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At the local pet store, zebra fish cost $2.00 each and neon tetras cost $2.15 each. If Ernesto bought 15 fish for a total cost o
bezimeni [28]
So first create and define your variables:
Z = amount of zebra fish
N = amount of neon tetras

Now create your equations:
2z+2.15n=31.20
z+n=15
This is your system. There are multiple methods to use but in this problem I’ll use the substitution method by simplifying the bottom equation.
2z+2.15n=31.20
z=15-n
Now I’ll plug the bottom equation into the top one.
2(15-n)+2.15n=31.20
And just solve from here.
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6 0
3 years ago
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Larry and his friend split the dinner bill evenly.
neonofarm [45]

Answer:

42.68

Step-by-step explanation:

21.34 * 2= 42.68

8 0
3 years ago
What are the end points of the triangle called? How are they labeled?
horrorfan [7]

For this case we have that by definition:

A triangle is defined by three lines that are called sides, or by three points called vertices.

We know that:

  1. <em>The vertices of a triangle are labeled with capital letters. </em>
  2. <em>The sides of a triangle are written with lowercase letters. </em>
  3. <em>The angles of a triangle are written similarly to the vertices. </em>

Answer:

The end points of the triangle are called vertices.

They are labeled in capital letters.

6 0
3 years ago
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