Evaluate 7x2 - 4y for x = -6 & y = 9.
Please help

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

25 ! what is the value of x? enter your answer in the box. x =