Can anyone pls help me in this pls I will mark u as brainliest

13.83

Step-by-step explanation:

AC = 3 - (-2) = 5

CB = 4 - 1 = 3

AC ⊥ CB

AB = √5² + 3² = √34 = 5.83

perimeter: 5 + 3 + 5.83 = 13.83

next question, use the formula d = √(x - x')² + (y - y')²

Step-by-step explanation:

1/5×80=80/5=16 because 1/5 out of 80 means to multiply 1/5 by 8o so the answer to that question is 16.

48÷1/2=48×2/1=96/1=96 because when you divide a fraction by fraction or a fraction with a number there is a rule that says you have to reverse the fraction on the right side and replace the division sign to a multiply sign and multiply. so the answer becomes 482)×2/1 which equals 96.