The tempature is -4 degrees a hogh pressure front increases the temp to 8 degrees by how many degress did the temp increase

4+(2+x) can you me solve this problem

This is about circle theorems. someone asap : (

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.