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const2013 [10]
3 years ago
13

Solve f(-4) if f(x) = -4x - 2.

Mathematics
1 answer:
nirvana33 [79]3 years ago
3 0
F(-4)= -4(-4) -2
F(-4)= 14
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Kayla ate one-eighth of a pizza. Joe ate two-eight of a pizza. How much total pizza did they eat
WITCHER [35]

Answer:

3/8

Step-by-step explanation:

6 0
3 years ago
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HELP PLEASE
mario62 [17]

Answer:

26.4

Step-by-step explanation:

<u>Law Of Cosines:</u>

    cos(A)=\frac{b^2+c^2-a^2}{2bc}

    This should work for any side. This can generally be thought as:

   cos(\text{angle}) = \frac{\text{sum of squares of two other sides-opposite side squared}}{\text{2 times the product of the other two sides}}

    If this is too confusing here's the formula for the other sides (which is essentially the same, just different variables)

   cos(B)=\frac{a^2+c^2-b^2}{2ac}

   cos(C) =\frac{a^2+b^2-c^2}{2ab}

Anyways now just plug in the known values into the equation

cos(A)=\frac{4^2+6^2-3^2}{2(6)(4)}\\

Square and multiply values

cos(A)=\frac{16+36-9}{48}

Add the values in the numerator

cos(A)=\frac{43}{48}

Take the inverse of cosine on both sides

A=cos^{-1}(\frac{43}{48})

calculate arccosine (inverse cosine) using a calculator

A\approx 26.384

Round to nearest tenth

A\approx26.4

7 0
2 years ago
PLEASE HELP ASAP!!!! IS THIS CORRECT?
xz_007 [3.2K]
From what I am looking at, it seems as if it is. :)
7 0
4 years ago
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Please help me this is from khan academy :(((
Dmitrij [34]

Answer:

y=1.4x+6.8

Step-by-step explanation:

(-2;4) (-7;-3)

4=-2k+b

-3=-7k+b

7=5k

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-2.8+b=4

b=6.8

I already know k and b so I can write an equation.

y=1.4x+6.8

6 0
3 years ago
Simplfy 4y-6(4z-5y)-4z
victus00 [196]

The correct answer: −18y−40




6 0
3 years ago
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