12. Sonya wants to sew ribbon along each side of a square pillow. If the pillow has an area of 144 square inches, how much ribbon must she buy to have the exact amount that she needs?

10) translation: 3 unts right and 4 units up \( Z(-4,-3), I(-2,-2), V(-2,-4) \)

9 Owen is painting a wall. The wall has a window and a door, as shown in the diagram. What is the area of the wall not including the window and

27. Vid addition av tal gäller den associativa lagen, d.v.s. \( (a+b)+c=a+(b+c) \). Till exempel är \( (3+2)+5=5+5=10 \) och \( 3+(2+5)=3+7=10 \). Den associativa lagen gäller även för addition av vektorer. Visa med ett exempel att detta gäller även för vektorema \( \vec{u}, \vec{v} \) och \( \vec{w} \).

10. Which of the following could not be the side lengths of a right triangle? A. \( 7.5,10 \) and 12.5 B. 85,13 and 84 C. 37,35 and 12 D. 24,22 and 40

ranslation: 4 units left and 4 units up \( (-1,-2), A(-1,0), N(3,-3) \)