Translate into alegraic exprssion. Jack will be x years old in 8 years. How old is he now? And really I can't understand this one.

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Me i'm timed ! a. -2 to 1 b. -1.5 to 0.5c. 0 to 1d. 0.5 to 1.5

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x