Addilyn's bedroom has a perimeter of 40 inches; the width is 8 feet. What is the length of her room?

If Addilyn wants to put a wallpaper border around her bedroom four times, what length of wallpaper border should she buy?

Length = 12 ft, she should buy 160 ft. of wallpaper border

Step-by-step explanation:

In order to find perimeter, you have to add up the values of all of the sides. Assuming that Addilyn's bedroom is a rectangle, we can use this equation to find the length:

8 + 8 + l + l = 40

Combine like terms

16 + 2l = 40

subtract 16 from both sides to isolate the 2l

2l = 24

Divide both sides by 2 to isolate the l

l = 12

The length of her room is twelve feet.

If she wants to put the border around the room four times, that means we'll have to multiply the perimeter by 4 to find out what length of wallpaper border she should buy.

4 * 40 = 160

She should buy 160 ft of wallpaper border.

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this

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step-by-step explanation: