How much is 1500 sq inches as normal inches? plz hurry

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Malia is observing the velocity of a cyclist at different times. after two hours, the velocity of the cyclist is 15 km/h. after five hours, the velocity of the cyclist is 12 km/h. part a: write an equation in two variables in the standard form that can be used to describe the velocity of the cyclist at different times. show your work and define the variables used. (5 points) part b: how can you graph the equations obtained in part a for the first 12 hours? (5 points) if you can try and make this as little confusing as you can

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?