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

Well, since you have 21 seats and 30 wheels then you would take the two wheels on each bike 2(x) then subtract 30 wheels because she already counted those, I may be wrong and it might be add 30 wheels. But 2x is a given.

The answer is a good luck

One shot. if 60% of 10 is 6, then what is 70%? we know it would be seven (since 60% is mathematically 60/100, or 6/10, then 70% is 70/100, or 7/10) but we can check anyway using ratios: 6 : 60% = x : 70%*inverse multiplicationx * 60% = 6 * 70%*divide both sides by 60%x = (6 * 70%) / 60%x = 7and since he has made 6 shots already, he would need just one more to get 7 shots or 70%. if the explanation is too confusing, comment and i will try to