अभ्यास 8.2 हल गर्नुहोस् र जाँच्नुहोस् : 3x=81
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A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

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?