Let A and B represent the number of hours that plans A and B last, respectively. Then the problem statement tells you
7A +9B = 12
5A +3B = 6
There are many ways this set of equations can be solved. I find it fairly simple to use a graphing calculator. The one shown tells me the workouts are each 3/4 of an hour.
Plan A lasts 45 minutes (3/4 hour)
Plan B lasts 45 minutes (3/4 hour)
Answer:
59
Step-by-step explanation:
First add the 8 to both sides, canceling out the 8 in the right and adding it to the 19 on the left, making it 27. Multiplying undoes division so, After that, multiply by three on both sides, canceling out the three on the right and multiply 27 by 3, making it 81.
Answer:
x = 21/5 (4 1/5
Solve:
x + 4/5 - 4/5 = 5 - 4/5
Seee:
why do you have so many tabs open
-16t^2+400=0
16t^2=400
take square root on both sides.

4t=20
t=20/4
t=5