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Valentin [98]
3 years ago
6

A rectangle living room is getting new wood floors the flooring is priced at $5.86 per square foot plus a 800$ insulation fee th

e living room measures 18 by 13 feet what is the total cost of the flooring insulation
Mathematics
1 answer:
Artemon [7]3 years ago
3 0

Answer:

multiply 18 and 13, which is equal to 234. then multiply that by $5.86 which is equal to $1371.24 then the last step add that by $800. which is equal to $2171.24. hope this helps

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X^2+4x+20=12x-5<br><br> Solve this equation
Scrat [10]

Answer:

4 + (or -) 3i

Step-by-step explanation:

Hi!

Alright, so we're going to move all of the variables and constants to one side. Then, using the quadratic formula, we'll find the answer.

1. Move 12x-5 to the left side of the equation by

  a. Subtracting 12x from both sides

  b. adding 5 to both sides.

1: x^2+4x+20-12x+5

2. Group the common terms

  x^2+4x-12x+20+5 --> x^2-8x+25

3. Look at the problem. We can't factor this.

Explanation for why this isn't factorable (you can skip this)

(1) 25 is positive, so its two factors will both be either positive or negative. We're looking for a negative 8, so let's go with negative.

(2) Factors of 25: 1 & 25, 5 &5

Seeing the problem? Ya, none of the factors of 25 sum to eight. So, instead, we're going to use the quadratic formula.

4.  So, the quadratic formula: \frac{-b+-\sqrt{b^2-4ac} }{2a}

Our equation is x^2-8x+25=0

a is the constant in front of the x^2

b is the constant in front of the x

c is the term without any x values

so, a=1, b=-8, and c= 25

Into equation:

\frac{8+-\sqrt{64-4(1)(25)} }{2a}=\frac{8+-\sqrt{64-100} }{2}=\frac{8+-\sqrt{-36} }{2}

8/2 = 4

sqrt(-36) = 6i

6i/2 = 3i (remember, we still have the two in the denominator)

4 + (or -) 3i

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2 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
2y+7z-2z+4y+8+y+2 Combine Like Terms
Andrew [12]

Answer:

7y+5z+10

Step-by-step explanation:

7y+5z+10

8 0
3 years ago
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What are the two solutions of 2x^2=-x^2-5x-1
hammer [34]

Answer:

x = 5/-6 + (√13)/-6

x = 5/-6 -(√13)/-6

Step-by-step explanation:

2x^2 = -x^2 - 5x - 1. Subtract 2x^2 from both sides.

-3x^2 - 5x - 1. Do the quadratic formula.

That gives you:

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