Answer:Bar lines specifies the no of beats in a bar. If the number of beats between bar lines is 4 then 4 is the number of beats in a bar.
Explanation:
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Answer:
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you would either take and add them together to equal 90 or take them separate like for example 4x+1=90
it would be equal to 90 because they are complementary angles which add up to 90
-hope this helps
