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3 years ago

What is the solution set of the equation x^2 - 7x - 18 = 0

Mathematics

2 answers:

Alenkasestr [34]3 years ago

5 0

Factoring this trinomial as the product of two binomials,

we have (x - 9)(x + 2) and set that equal to 0.

So we have (x - 9)(x + 2) = 0.

So either x - 9 = 0 or x + 2 = 0.

Solving for <em>x</em> in each equation, we find that our solution is {9, -2}.

photoshop1234 [79]3 years ago

3 0

(x-9)(x+2)=0
x=9 or x=-2

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Graph the function y = __ 2x

katen-ka-za [31]

Answer:

Well, if <em>y </em>is 1

Then the equation would be y = 1 (2x)

So, depending on the answer options. Y would be double of whatever the X value is.

See how 1 X value is worth 2 Y?

Example Attached

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3 years ago

The volume of a cube is 64 cubic inches. Which expression represents s, the length of a side of the cube?

vlabodo [156]

Answer:

<h2>Therefore the length of a side of a cube is $\sqrt[3]{64}\ or\ 4$ </h2>

Step-by-step explanation:

The volume of a cube is expressed as L³ where L is the length of each side of the cube.

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On substituting;

64 = L³

Taking the cube root of both sides to determine L we have;

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3 years ago

Can you help me Decrease £38 by 4%

kykrilka [37]

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3 years ago

(5f − 3) (–2) <br><br> help me plz lolz

Marat540 [252]

Answer:

Step-by-step explanation:

(5f-3)(-2)

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3 years ago

Composition of functions Find g (f(x)) for the following problems

beks73 [17]

$f(x)=-3x\qquad g(x)=5x-6\\\\g(f(x))=5(-3x)-6=\boxed{-15x-6}$

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$f(x)=2x^2\qquad g(x)=8x^2+3x\\\\g(f(x))=8(2x^2)^2+3(2x^2)=8\cdot4x^4+6x^2=\boxed{32x^4+6x^2}$

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3 years ago