The owner of a bike shop sells unicycles and bicycles and keeps inventory by counting seats and wheels. one day, she counts 21 seats and 30 wheels. which equation in slope-intercept form shows that x bicycles and y unicycles together have a total of 30 wheels?

a. y = -2x - 30
b. y = -2x + 30
c. y = 2x + 30
d. y = 2x - 30

Due sun 06/03/2019 11: 59 p the list below shows the ages (in years) of 10 people riding in a van to a math competition. calculate the mean age of the people in the van. round your answer to the nearest tenth of s year. 10 12 13 11 10 12 ages 11 38 mean- years ( round your answer to the nearest tenth.) median- years ( enter an exact answer.) hint: textbook measures of center, points possible: 1 license this is attempt 1 of 3. submit