faithtuell
faithtuell
16-02-2017
Mathematics
contestada
4d+15less then or = to -1
Respuesta :
Noellehope
Noellehope
16-02-2017
4d + 15d ≤ -1 : ∑ Solution: Interval Notation: ( d ≤ -4
-∞, -4 ]
Steps
4d + 15 ≤ -1
-----------------
S
ubtract 15 from both sides
4d + 15 -15 ≤ -1 - 15
Refine
4d ≤ -16
Divide both sides by 4
4d/4 ≤ -16/4
Refine
d ≤ -4
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