Two sides of a rectangle are x-7 and 2x+1. write an expression that represents the perimeter of the rectangle.

Miranda is braiding her hair. then she will attach beads to the braid. she wants 1_3 of the beads to be red. if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

In the figure below, triangle rpq is similar to triangle rts. what is the distance between p and q? a. 24 b. 42 c.50 d. 54

What is the simplified form of square root of 400 to the 100th power ?