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Answer:
7z
Step-by-step explanation:
subtracting a negative is like adding

Answer:
Area of rectangle = l x b
18 = l x b
Factors of 18 =
1 x 18 = 18
2 x 9 = 18
3 x 6 = 18
So each of the sides can be either 1cm and 18 cm, 2cm and 9cm and 3cm and 6cm.
Answer:
w
Step-by-step explanation:
The amount of water they need to bring depends on how long they will be hiking.
Answer:
D
Step-by-step explanation:
loudness depends on the amplitude or height of the sound waves