if f(x)=5x^2-4/x , find f(4) and show your work.?

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2007-01-31 06:10:12 · 3 answers · asked by alona p 1 in Science & Mathematics ➔ Mathematics

79

plug in a 4 wherever x is found

(5)(4^2)- (4/4) =
5(16) - 1 =
80 - 1 =
79

2007-01-31 06:15:31 · answer #1 · answered by JEBalke 2 · 0⤊ 0⤋

f(4) = 5 x 4Â² - 4/4 = 5 x 16 - 1 = 79

2007-01-31 06:17:37 · answer #2 · answered by Como 7 · 0⤊ 1⤋

f(4) = 5*4^2 - 4/4
f(4) = 5*16 - 1
f(4) = 80 - 1
f(4) = 79

2007-01-31 06:17:20 · answer #3 · answered by apocalyps956 2 · 0⤊ 1⤋