Just add all the numbers and then devide by how many numbers we have:
14+16+17+28+20=95
95÷5=19
Use substitution when either and x or y is given, for instance: x = 2y + 3 or y = 8x - 9.
Use elimination when a number from both equations can cancel each other out, for example:
2x + 3y = 19
-2x + 7y = 12
Hope this helps!
Answer:
4d+2m+13
Step-by-step explanation:
Well the answer i think is going to be 18
