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Irina18 [472]
3 years ago
10

Please help answer thisq​

Mathematics
1 answer:
Julli [10]3 years ago
5 0

Answer:

More than one independent variable being tested.

Step-by-step explanation:

If a student wants to figure out if ONLY salt affects the growth of seeds, the student shouldn't change the amount of sunlight being received.

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Hello from MrBillDoesMath!

Answer:

The first choice,  Pi + (-Pi) = 0

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Pi is an irrational number. Saying the irrational numbers <u>are</u> closed under addition means if we add two irrational numbers we will get another irrational number. In our case, Pi + (-Pi) = 0, which is correct, BUT 0 is a <u>rational </u>number. This shows the set of irrational numbers is NOT closed under addition.

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