Find the solution(s) of the following equation.
x2 = 81

Someone me what is the area of this figure? 18m 18m 8m 16m

3x + 4y = 5 x- 3y = -7 solve by substitution

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.