How many different four letter alarm codes cam be formed for a house alarm if you can use any uppercase letter in the alaphabet without being repeated

Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.