counting seats and wheels.? One day, she counts 21 seats and 30 wheels. How many of each type of cycle are there?
Choose an equation in slope-intercept form that expresses the fact the number of bicycles plus the number of unicycles is 21.
A. 21/b = u
B. b + u = 21
C. u = -b + 21
D. b = u + 21
E. -u = b + 21
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