How many minutes would you have to exercise each day to have a resting heart rate of 60 beats per minute?
1 answer:
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Answer: v = 2
Step-by-step explanation:
30-48v+12 = -54
-48v = -54-30-12
=
v = 2
Let p be the prize of a pen and m the prize of a mechanical pencils. If you buy six pens and one mechanical pencil, you spend 6p+m. We know that this equals 9, because you get 1$ change from a 10$ bill.
Similarly, if you buy four pens and two mechanical pencils, you spend 4p+2m, which is 8$, because now you get a $2 change. Put these equation together in a system:
Now, if you multiply the first equation by 2, the system becomes
Subtract the second equation from the first:
Plug this value into the first equation to get
You would use 6 gallons of water to water 45 plants
4=30
=
of 4 gallons = 6 gallons
4=30