Answer:
they are good I think I don't see why they wouldn't be
Answer:
4 need to join the club to remain same to grade 8th
Assuming the bike is 70 inches
70/12in = <span>5.83333333333</span>
The goal to proving identities is to transform one side into the other. We can only pick one side to transform while the other side stays the same the entire time. The general rule of thumb is to transform the more complicated side (though there may be exceptions to this guideline).
So I'll take the left hand side and try to turn it into 
One way we can do that is through the following steps:

Since we've shown that the left hand side transforms into the right hand side, this verifies the equation is an identity.
15/40 x 100 = 37.5
equation for percent decrease is diiference/original x 100.