If 3x-1=11 what is the value of xsquared+x

What value of x will make the triangles similar by the sss similarity theorem?

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

Use sigma notation to represent the following series for 9 terms.