A square is a square a trapezoid is a lot weirder <span />
Answer:
Fossils: number one
Continental Shapes: number three
Seafloor Spreading: number two
Step-by-step explanation:
The coefficients of the y terms are -3 and 2. The least common multiple of 3 and 2 is 6. So multiply the first equation by 2 and the second equation by 3, so that the y terms have a coefficient of 6.
4x − 6y = 42
-18x + 6y = 21
The signs are opposite, so add the equations together.
-14x = 63
x = -9/2
Answer: 69
Step-by-step explanation: the steps
