Answer:
20 pencils
Step-by-step explanation:
4 pens (4) = 16 pens
5 pencils (4) = 20 pencils
This works because 4/5 and 16/20 are the same ratio, 16/20 isn't simplified..
Answer:
i think the answer is 19x^-2x+2
Answer:

Step-by-step explanation:
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Collecting like terms and expanding the brackets
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Answer:
15 cm
Step-by-step explanation:
75 miles / 5 miles = 15
15 * 1 centimeter = 15 cm