The owner of a bike shop sells unicycles and bicycles and keeps inventory by counting seats and wheels. on day, she counts 15 seats and 22 wheels. the equation representing the total number of seats is u + b = 15 where u is the number of unicycles and b is the number of bicycles.

The first thing that you need to realize is what slope-intercept form is. Remember that it is y=mx+b. I always say one variable on the left, while everything else is on the right. After you do that, you need to set up some equations. Seats Each cycle has 1 seat. You know there are 21 seats. So

u+b=21

Manipulate that equation into something that looks like slope-intercept form.

u+b=21

u+b−b=21−b

u=21−b

Now just rearrange the terms on the right side. You have an answer. If you needed the other equation, it would be set up like

u+2b=30

SO the answer is 30

That little box would be 90 degrees. a triangle should be 180 degrees. 90 + 15= 105. 180-105=75. your answer would be 75 degrees but since you asked for the nearest tenth, it would be 80 degrees.