Subtract the mixed numbers by finding the common denominator. HELP 15 POINTS AND MY NUMBER IF U ANSWER five and seven tenths minus one and two fifths equals blank

five and three tenths
four and nine tenths
four and three tenths
four and nine fifteenths

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

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