Answer:
<em>we </em><em>use </em><em> </em><em><u>variable</u></em><em> </em><em>to </em><em>represent</em><em> </em><em>a </em><em>value</em><em> </em><em>that</em><em> </em><em>we </em><em>don't</em><em> </em><em>know</em>
e.g
a,b,c,x,y,etc.
Answer:
c -13
Step-by-step explanation:
Solution: The commutative property of addition states that when two numbers are being added, their order can be changed without affecting the sum.
Answer:
1. The Principle of superposition states that a strata of rock is younger than the one over which it is laid.
2. The intrusion of the younger rock by the principle of cross-cutting relationship
3. The intrusion igneous rock arrived after the rock it is found in had already been in place and is stable.
Step-by-step explanation:
In geology, the Principle of superposition states that, in its originally laid down state, a strata sequence consists of older rocks over which younger rocks are laid. That is, a stratum of rock is younger than the stratum upon which it rests.
The principle of cross cutting relationships in a geologic intrusion occurrence, the feature which intrudes or cut across another feature is always than the feature it cuts across.
The reason is that based on the geologic time frame, the rock 1 which ws cut across by rock 2 was already in the geologic zone in a more steady state than rock , therefore it is older than the cutting rock 2.
