Isabel is riding on a bike course that is 36 miles long. so far , she has ridden 9 miles of the course. what percentage of the course has isabel ridden so far ?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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?

Which expression is the factorization of x^2+10+21