Explain the steps to the quadratic formula when solving the equation x^2+2x-7=0?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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?

Acredit union pays 5% annual interest, compounded daily, on savings deposits. find the value after one year of $500 deposited in this account. $525.64 $25.64 $20.40 $520.40