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Aloiza [94]
3 years ago
3

Marissa subtracting a negative number from a positive number her result was negative is that reasonable explain

Mathematics
2 answers:
Alecsey [184]3 years ago
8 0

Answer:

It is reasonable because the absolute value of a negative number could be bigger than the positive number.

Step-by-step explanation:

If marissa subtracted -12 from 7, it would result in a -5 which is a negative number.  The absolute value of -12 is 12 and 12 is bigger than 7.


Does that make sense?

Blizzard [7]3 years ago
5 0

Answer:

No, the calculation is not correct.

Step-by-step explanation:

We are given that,

Marissa is subtracting a negative number from a positive number, resulting in a negative number.

For e.g. Let us consider the calculation, 4 - ( -3 )

Now, 4 - ( -3 ) = 4 + 3 = 7.

So, we see that the resulting number is a positive number.

That is, the minus operation with the negative sign will become addition operation.

Hence, the fact that Marissa is obtaining a negative number after subtracting a positive number by a negative number is not reasonable.

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a farmer has 10 acres to plant in wheat and rye. He has to plant at least 7 acres. However, he has only $1200 to spend and each
Jobisdone [24]

Answer:

4 acres of wheat and 4 acres of rye.

Step-by-step explanation:

Given: Farmer has only 7 acre, he has plant at least 7 acres.

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          Each acre of wheat will cost $200 and rye will cost $100.

          Planting time is only 12 hours

          Wheat planting take 1 hour per hour and rye take 2 hours per acre.

          Profit on wheat is $500 per acre and rye $300 per acre.

As to find out maximum profit, we need to plant maximum wheat.

While dividing number of acres of land for wheat and rye for plantation, we need to keep two constraint in the mind; Constraint of cost and time as given.

Lets assume few number considering these constraint to get maximum profit.

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Time taken= 5\times 1= 5 h\\2\times 2= 2 h

Total time taken 7 hours

Amount spent= 5\times 200= \$ 1000\\2\times 100= \$ 200

Total cost is $ 1200.

Profit= 5\times 500= \$ 2500\\2\times 300= \$ 600

Maximum profit= $3100.

Second assumption, 4 acres of wheat and 4 acres of rye.

Times taken= 4\times 1= 4 h\\4\times 2= 8 h

Total time taken is 12 hours

Amount spent= 4\times 200= \$ 800\\4\times 100= \$ 400

Total cost is $1200.

Profit= 4\times 500= \$ 2000\\4\times 300= \$ 1200

Maximum profit= $3200.

∴ By using hit and trail method, we can see that we are getting maximum profit when farmer is planting 4 acres of wheat and 4 acres of rye.                

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