I need help with this.

4x - 2

Step-by-step explanation:

The perimeter of a shape is when you add up all the sides.

-So, you can write it as: 2x - 5 + 5 - x + 3x - 2.

-Group the terms together to get: 2x + 3x - x - 5 + 5 - 2

-Combine like terms to get: 4x - 2

Hope this helps! :)

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75

hello there!

i believe the answer is

(cot2+1)/sec2=cot2

    csc2/sec2=cot2

  (1/sin2)/(1/cos2)=cot2

  (1/sin2)(cos2/1)=cot2

  cos2/sin2=cot2

  (1/tan2)=cot2

  (cot2)=(cot2)

hope this !

hyperz ^_^