To answer this item, we let x be the measure of angle Y. If we say supplement, it is understood that when we sum up the measures of the two angles (angle Y and its supplement) the answer should be 180. Therefore the other angle is 180-x. Going back to the condition given in this item, we will be able to generate an equation,
x = 3(180 - x)
The value of x from the equation is 135. Thus, m∠Y is 135°.
Answer:
700 dollars.
Step-by-step explanation:
The sale price is basically the new price of the bycicle. Therefore, is all bycicles cost 7/8 of their normal value, 
. So during this sale at the sporting goods store, the bycicle would cost 700 dollars.
