Brookie13 Brookie13

13-01-2017
Mathematics

contestada

(NEED HELP FAST, PLEASE!!)

What is the difference of j and k?

J(x)=x-14
K(x)=7+x

A- (j-k)(x)=-21
B-(j-k)(x)=-21+2x
C-(j-k)(x)=-7
D-(j-k)(x)=-7+2x

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13-01-2017

j(x)-k(x)=(x-14)-(7+x)=x-14-7-x=x-x-14-7=0-21=-21

answer is A

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