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The water level at Lake Penny changed −1 1/10 in. this year. Next year, it is predicted to change another −1 2/5 in. What is the total change that will likely occur in 2 years?

User Nerohmot
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7.9k points

2 Answers

1 vote

Answer:

its 2 1/2

Step-by-step explanation:

User Gnerkus
by
8.2k points
7 votes

Answer:

Total change that will likely occur in 2 years = -2.5 in.

Step-by-step explanation:

The water level at Lake Penny changed
-1 (1)/(10) in first year and
-1 (2)/(5) in in the second year. We need to find total change in the two years.

We know that
a(b)/(c) can be written as
(ac+b)/(c)

So
-1 (1)/(10)=-((1*10+1))/(10) )=(-11)/(10)


-1 (2)/(5)=-((1*5+2)/(5))= (-7)/(5)

So total change in two years =
(-11)/(10)+(-7)/(5) =(-11-2*7)/(10) =(-25)/(10) =-2.5inch

Total change that will likely occur in 2 years = -2.5 in.

User Svein Terje Gaup
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8.6k points

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