Hint: Try using the Pythagorean thereom to solve it.
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Answer:
Step-by-step explanation:
Is there a question somewhere in there?
Answer:
20 pens
Step-by-step explanation:
if there is 1 red pen for every 4 blue pens
then
4 red pens would have 16 blue pens with it. makes a total of 20 pens, with 12 more blue pens than red pens
X in this equation equals 140°