What is 1 and 8/10 minus two and 2/5? You get 29 points for answering!

Please answer question correctly and with explanations!

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

Solve the equation by completing the square. x^2+2x=17

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4