¹⁻ (10p - 7q) ² if p = 9 and q = 2 what is the answer?

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Are the corresponding angles congruent? explain why or why not.