7 pens and 20 pencils because 28 divided by 4 = 7 and 80 divided by 4 = 20
Answer: sqrt(19)/10
Step-by-step explanation:
sinx=0.9
x=arcsin(0.9)
Insert x for cos(x):
cos(arcsin(0.9)=
Use identify , so
Sorry if this is confusing.
Answer:
Could you explain it another way?
Step-by-step explanation:
Answer:
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