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OpenStudy (anonymous):
Given the function f(x) = 5x - 9, find f(-3).
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OpenStudy (ivettef365):
just substitute the x on the function for -3
OpenStudy (ivettef365):
so youhave 5(-3) - 9 = ??
OpenStudy (anonymous):
yes ! so that would turn into -15 - 9 , which equals -24 ?
OpenStudy (ivettef365):
correct so f(-3) = -24
OpenStudy (anonymous):
Thanks For Your Help !
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OpenStudy (ivettef365):
yw :)
OpenStudy (anonymous):
what about What is the x-coordinate of the x-intercept of the line that passes through points (-5, 3) and (1, -3)?
OpenStudy (ivettef365):
first I would find the equation of the line, for that you need to find the slope y2-y1 ----- x2-x1
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