Lorenzo sells adult and student tickets to an upcoming basketball game. He sells more student tickets than adult tickets. The adult tickets are $5 each and the student tickets are $3 each. He sells more than $900 worth of tickets in total. The system of linear inequalities that describes this situation, where x is the number of adult tickets and y is the number of student tickets, is shown below.

C

Step-by-step explanation:

Yes, it does have to be a whole number

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.