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Molodets [167]
3 years ago
11

A pair of noise-canceling headphones regularly sells for $116. They

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
5 0

Answer:

The headphones are now $40.60.

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Given that f(x) = x^2 + 4x, evaluate f(-2)
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Hi there!

To find f(-2), we need to plug in the value x = -2 into the equation.

f( - 2) = ( - 2) {}^{2}  + 4 \times  - 2 = 4 - 8 =  - 4
Remember that multiplying a negative by a positive ends up with a positive.

~ Hope this helps you!
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Estimate the product. Round each number to its greatest place value, then multiply.
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Find the exact value of the trigonometric function of theta from the given information. cosine thetaequalsnegative StartFraction
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4 years ago
What type of quadrilateral is created by the points:<br><br> L (-5,4), M (2,2), N (0,-3), S (-7,-1)
kumpel [21]

Given same lengths and slopes of the opposite sides and nature of the angle between adjacent sides, we have;

  • The type of quadrilateral is a parallelogram

<h3>How can the type of quadrilateral be found?</h3>

The given points are;

L(-5, 4), M(2, 2), N(0, -3), S(-7, -1)

Lengths of the sides are;

Length of LM = √((2-(-5))²+(2-4)²) ≈ √(53)

Length of MN = √((2-0)²+(2-(-3))²) ≈ √(29)

Length of NS = √((0-(-7))²+((-3)-(-1))²) ≈ √(53)

Length of LS = √(((-7)-(-5))²+((-1)-4)²) ≈ √(29)

Therefore;

  • The lengths of opposite sides are the same.

Slope of LM = (2-4)/(2-(-5)) = -2/7

Slope of MN = (2-(-3))/(0-2) = 5/2

Slope of NS = ((-3)-(-1))/(0-(-7)) = -2/7

Slope of LS = ((-1)-4)/(-7-(-5)) = 5/2

Therefore;

  • The opposite sides are parallel, and

  • The the adjacent sides are not perpendicular

The quadrilateral created by the points L(-5, 4), M(2, 2), N(0, -3), S(-7, -1) is therefore;

  • A parallelogram

Learn more about parallelograms here:

brainly.com/question/1100322

#SPJ1

8 0
2 years ago
PLSSS HELP ME!! I'll give you 20 points and the brainlest answer.​
MrMuchimi
The answer should be this;
11.5(7) + 10.7 (8)= 166.1

166.1+ 85.6=251.7
8 0
3 years ago
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