Using the properties of equality to solve the equation -2b + 7 = -13, you would

add 13 and then divide by -2
add 13 and then add 2
subtract 7 and then add 2
subtract 7 and then divide by -2

Follow PEMDAS in reverse. So you would start off undoing the +7. Which means you subtract 7 from both sides

Then undo the -2 multiplying with the b. So you divide both sides by -2

The final answer is therefore D) subtract 7 and then divide by -2

The distance from point a to point c across the coordinate plane is aproxamatly 8.94 rounded to the nearest hundredth. you use a^2 + b^2 =c^2