The answer is -3/4 I got it on my calculator
        
                    
             
        
        
        
He didn’t follow PEMDAS which is the an acronym for the order of operations. according to pemdas the first step is parenthesis (which is the p in pemdas) there fore the first step is to add the 1 and the 2
then since there are no exponents you multiply so you multiple 5(3) which is 15
then you can add all the number left to right 
so 15+2+3= 20
so the answer is 20
hope this helped
let me know if you have any questions
        
             
        
        
        
Answer:
Use “ Math- way”
Step-by-step explanation:
It’s a web browser made for this stuff, you‘re welcome
 
        
             
        
        
        
Parallelograms have equal and parallel opposite sides
<em>The coordinates of the 4th point is (-2,3)</em>
Let the parallelogram be ABCD, such that:



A and B have the same y-coordinates, while their x-coordinates are additive inverse
This means that:
The y-coordinates of point C and point D will be the same, while their x-coordinates will be additive inverse.
<u>For point C</u>
We have:


<u>For point D</u>
The coordinates would be:


Hence, the coordinates of D is (-2,3)
Read more about parallelograms at:
brainly.com/question/9680084