Antwan used 12 yards of twine to wrap a tree, 16 feet of twine to wrap a stack of newspapers, and 18 inches of twine to hang a picture.

how many inches of twine does antwan have left?

__ inches

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?