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3 years ago

HELPP!! if f(x)= 5x - 12 what is f(-4)

Mathematics

1 answer:

sp2606 [1]3 years ago

5 0

Answer:

-32

Step-by-step explanation

f(-4)= 5(-4) - 12

f(-4)= -20 -12

f(-4)= -32

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Solve 2x2 − 8x = −7.

leva [86]

$\sf 2x^2 - 8x = - 7 \\ \\ Subtract \ -7 \ from \ both \ sides \ of \ the \ equation. \\ \\ 2x^2 - 8x - (-7 ) = - 7 - (-7) \\ \\ 2x^2 - 8x + 7 = 0 \\ \\ Use \ quadratic \ formula \ a = 2, b = -8, c = 7 \\ \\ x = \dfrac{- b \pm \sqrt{b^2- 4ac} }{2a} \\ \\ \\ x = \dfrac{-(-8) \pm \sqrt{(-8)^2 - 4 (2) (7) } }{2(2)} \\ \\ x = \dfrac{8 \pm \sqrt{8} }{4} \\ \\ x = 2 + \frac{1}{2}\sqrt{2} \ or \ x = 2 + \frac{-1}{2} \sqrt{2}$

Ur answer is the fourth one

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3 years ago

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Sherry has a package in the shape of a rectangular prism. What is the volume, in cubic inches (in.), of the rectangular prism? (

Rudiy27

Answer:

See Explanation

Step-by-step explanation:

The question is incomplete as the dimension of the prism is not given. However, the following steps can serve as a guide for you.

The volume of a rectangular prism is calculated as thus:

$Volume = Length * Width * Height$

So, Take for instance

$Length = 2\ in$

$Width = 3\ in$

$Height = 4\ in$

The Volume would be:

$Volume = 2\ in * 3\ in * 4\ in$

$Volume = 24\ in^3$

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3 years ago

The graph above represents the following polynomial function.

Korvikt [17]

Answer:

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Step-by-step explanation:

Note: There is no graph. I assume you mean "zeroes/roots" by "solutions".

x(x^2-2x-3)=0

/(x^2-2x-3)

x=0

x^2-2x-3 = x^2+x-3x-3 = x(x+1) + ( -3(x+1) = (x-3)(x+1)

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/(x+1) --> x-3 = 0, x=3

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3 years ago

Using the method described in part F, help Kevin change 9/2= x/24 to an equation without fractions. Show your work. Don't solve

soldi70 [24.7K]

Answer:

108 = x

Step-by-step explanation:

multiple both sides by 24 and simplify

9 x 24 = 216/2=x

108 = x

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3 years ago

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Which proportion is equivalent to a/b = c/d

PilotLPTM [1.2K]

The proportion equal to a/b = c/d is A.) A/C = B/D

We will know if a proportion is equivalent when its cross products are equal.

a/b = c/d where ad = bc

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3 years ago

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