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azamat
2 years ago
9

Find the area of ABC to the nearest tenth, if necessary

Mathematics
1 answer:
ElenaW [278]2 years ago
4 0

Answer:

  29.7 m²

Step-by-step explanation:

The relevant area formula is ...

  A = 1/2ab·sin(C)

  A = 1/2(12.6 m)(8.9 m)sin(32°) . . . . use given values

  A = (1/2)(12.6)(8.9)(0.52992) m² ≈ 29.7 m²

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3 years ago
Write a polynomial function f of least degree that has a leading coefficient of 1 and the given zeros -4,-2,5. write the functio
OLga [1]

Answer:

Step-by-step explanation:

This is a third degree polynomial since we have 3 zeros.  We find these zeros by factoring the given polynomial.  The zeros of a polynomial are where the graph of the function goes through the x-axis (where y = 0).  If x = -4, the factor that gives us this value is (x + 4) = 0 and solving that for x, we get x = -4.  If x = -2, the factor that gives us that value is (x + 2) = 0 and solving that for x, we get x = -2.  Same for the 5.  The way we find the polynomial that gave us these zeros is to go backwards from the factors and FOIL them out.  That means that we need to find the product of

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x^2+6x+8

No we multiply in the final factor of (x - 5):

(x^2+6x+8)(x-5)=x^3+6x^2+8x-5x^2-30x-40 which simplifies to

f(x)=x^3+x^2-22x-40

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3 years ago
Add 4x²y,-2xy²,-5xy²,3x²y plz explain​
Vinil7 [7]
4x^2 - 2xy^2
5xy^2 +
3x^2y
_____________
12x^5y^4-2xy^2

This is so because 4+5+3 is 12, then using laws of indices to add your x and y you get x^5 and y^4

To simplify your answer to the lowest you have it in the form of
3x^2y^2(4x^2y - 2xy^2)

If you multiply this as well you get the same answer I got with the addition
3 0
3 years ago
5. (3x2 – 13x – 10) ÷ (x – 5)
IgorC [24]

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( 3 {x}^{2}  - 13x - 10 ) \div (x - 5) =  \\

\frac{3 {x}^{2} - 13x - 10 }{x - 5}  =  \\

\frac{(x - 5)(3x + 2)}{(x - 5)}  =  \\

3x + 2

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

3 0
3 years ago
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