Prove that mn < 0 if and only if m > 0 and n < 0 or m < 0 and n > 0

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

The table shows the total distance that myra runs over different time periods. which describes myra’s distance as time increases? increasing decreasing zero constant

What is the perimeter of square abcd? units units 28 units 37 units