brookestille1 brookestille1
  • 26-10-2019
  • Mathematics
contestada

need help on math question​

need help on math question class=

Respuesta :

gmany
gmany gmany
  • 26-10-2019

Answer:

y = 4.5

Step-by-step explanation:

[tex]\dfrac{15}{y}=\dfrac{40:4}{12:4}\\\\\dfrac{15}{y}=\dfrac{10}{3}\qquad\text{cross multiply}\\\\10y=(15)(3)\\\\10y=45\qquad\text{divide both sides by 10}\\\\\dfrac{10y}{10}=\dfrac{45}{10}\\\\y=4.5[/tex]

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