Answer:
100
Step-by-step explanation:
because it is directly proportional so 4 times ten is 40 and 10 times 10 is 100
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Answer:
22
Step-by-step explanation:
N-9=13
N-9+9=13+9
N=22
Answer:

Step-by-step explanation:

Add 25 to both sides:


Square root both sides:
(Since a negative number multiplied by itself gives positive, there are two answers.)
