How much does $213/month over 40 years (which is a total of $102,240) become over $1 million

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Collin did the work to see if 10 is a solution to the equation r/4=2.4

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?