Question 198041
Given:
{{{t}}} is minutes you play soccer
{{{75}}} min is the total workout
{{{75 - t}}} is minutes lifting weights
{{{7t}}} is calories burnt playing soccer
{{{3*(75 - t)}}} is calories burnt lifting weights
Let {{{C(t)}}}= total calories burnt during workout
{{{C(t) = 7t + 3*(75 - t)}}}
{{{C(t) = 7t + 225 - 3t}}}
{{{C(t) = 4t + 225}}} calories answer
and
{{{t = 55}}} min
{{{C(55) = 4t + 225}}}
{{{C(55) = 4*55 + 225}}}
{{{C(55) = 220 + 225}}}
{{{C(55) = 445}}} calories