(a) how much higher is checkpoint 1 than checkpoint 3?
checkpoint 1: -43
checkpoint 3: -177

(6) the top of a hill rises 294 feet above checkpoint 3.
what is the altitude of the top of the hill?

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb