What is -2-5(-2-7i) simplify with full working?

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.