Question #3dc62
1 Answer
Explanation:
Let
We can make 2 equations:
We know that the total number of minutes is 48, so:
#l + t = 48# We know that the total calorie burn must be 400, so:
#9l + 8t = 400#
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Now that we have a system of equations, we can solve it through subtraction, like this:
Multiply both sides of the first equation by
#8# :
#8l + 8t = 384# Now subtract this modified form of the first equation from the second equation:
#color(white)"X.." 9l + 8t = 400#
#-(8l + 8t = 384)#
#-------#
#color(white)"XXXXX"l = 16#
So we know what
#l + t = 48#
#16 + t = 48#
#t = 32#
So
Final Answer