What is the value of a in the equation 5a - 10b = 45, when b = 3?

Andy is making a design using ice cream sticks that are 4 and 1/2 in long he wants this long side of his designed to be no longer than 24 inches what is the greatest number of sticks that any can use on his long side of his design

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?