7hundreds 4 tens 1 ones so how to write them with standard form, expanded form, word form

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?