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3 years ago

Please I need a answer fast

Mathematics

1 answer:

Sphinxa [80]3 years ago

3 0

solution

X + k

X - 2k

=X+k-x-2k

=x-x+k-x-2k

=0-k

=-k

or,

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A line has a slope of 4. What is the slope of any line perpendicular to this line? A −4 B −14 C 14 D undefined

ICE Princess25 [194]

Answer:

-1/4

Step-by-step explanation:

Perpendicular lines have slopes that multiply to -1

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Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machin

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Step-by-step explanation:

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3 years ago

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In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= root 2 cm.

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Given CD is an altitude such that AD=BC , AB=3 cm and CD= √2 cm.

Let AD=x, Since given AB=3

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x+DB = 3

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$BC^{2} = DB^{2} +CD^{2}$

$BC^{2} = (3-x)^{2} +(\sqrt{2} )^{2}$

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Since given AD=BC,let us plugin BC=x in above step.

$x^{2} =(3-x)^{2} +2$

$x^{2} =9-6x+x^{2} +2$

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x= $\frac{11}{6}$

Now we know AD=x= $\frac{11}{6}$ and given CD=√2.

Let us apply Pythagoras theorem for ΔACD

$AC^{2} =AD^{2} +DC^{2}$

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3 years ago