7th Class
Mathematics
Algebraic Expressions
Question Bank
Algebraic Expressions
question_answer
From 2012-2016, the amount (in crores) spent on natural gas N and electricity E by Indian residents can be described by the following expressions, where t is the number of years since 2012. Gas spending model, \[N=2.13{{t}^{2}}-4.21t+37.40\] Electricity spending model, \[E=-0.209{{t}^{2}}+5.393t+307.735\] What is the total amount A spent on natural gas and electricity by Indian residents from 2012 to 2016?