Pls help shaded parts need answers

Blank 1: x

Blank 2: 2x

Blank 3: 2x-16

Blank 4: 12

Blank 5: 16

Blank 6: 2

Blank 7: 14

Blanks 8-10: at least 14

Blank 11: negative

Blank 12: flip

Blank 13: 2m

Blank 14: money

Blank 15: spent

Step-by-step explanation:

I believe these are the correct answers. I'm not so sure about Blank 12, 14 and 15, but otherwise I think these are correct. If you have any questions on any of them I'm happy to explain why. I hope this helps :D

Step-by-step explanation:

For Part A, use the pythagorean theorem to find the height, which ca be found by finding one length of the leg. Using the imaginary bisector, you can determine one of the legs is 5 cm, and the hypotenuse is 13 cm

a^2 + b^2 = c^2 where a and b are the legs and c is the hypotenuse. Plug in the values to solve for one leg, you get 25+b^2=169

Solve algebraically, b^2= 144, so b=12, which is the height.

Part B

Determine the surface area of each cardboard piece, and add together.

20 × 13 × 2 = 520

1/2 × 10 × 12 × 2 = 120

20 × 10 = 200

So approximately 840 cm of cardboard was used