200 times / 3 minutes = x times / 60 minutes
3x = 12000
x = 4000 times in an hour
A person's heart will beat 4000 times in an hour.
Hope this helps!! :)
Equation::
value + value = value
80x + 60(50-x) = 74*50
----
80x + 60*50 - 60x = 74*50
----
20x = 14*50
x = 35 lbs (amt. of 80 cent tea to use)
50-x = 15 lbs (amt. of 60 cent tean to use)

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- ➠ Principal = $ 35000
- ➠ Rate of interest = 3%
- ➠ Time = 3 yrs (36 months)





In order to invert a function, switch y and x in the definition, and solve for y again:

Solving for y, we have
