4. Point D(O,11) is dilated from the origin by scale factor r=4. What are the coordinates of point D'?

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.

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

What is the value of the product (3-2i)(3+2i)?