If the simple interest on ​$1000 for 4 years is ​$280​, then what is the interest​ rate?

What’s the question here? what have you been learning about?

The answer is 225 miles per 4.5 hours. hope this ; )

You move the constant to the right side and change its sign to be 9z= -6 -8. that’s the first step.the second step would be calculate the difference of -8-6 to get -14. you equation should now be 9z=-14the last step is to divide both sides by 9 to get z=-14/9hope this