Simplify the Expression

7 + 8k - 5 + 3 - 3r + 2k - r

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)

After john worked at a job for 10 years, his salary doubled. if he started at $x, his salary after 10 years is o $2 $x42 $x-2 $24

What is 0.7 as a % plz i am really dum soo plz me i dont know math