(-25) + 10 + (-5) = -20 feet is his current position. To reach zero, he should add 20 feet to his altitude.
Answer:

Step-by-step explanation:
See the attachment for better understanding..
So x is equal to 40 so the length of M and N is 140 and no is 70 with the total length being 210 hope I helped could I get a brainliest!!
5a-10b=45
b=3
5a -10(3) = 45
5a - 30 =45
5a = 75
a= 15
Answer:
it's 3
I am typing this to get over the 20 character limit