Let 
, so that 
but 
. Since 
, it follows that 
, and since 
, it follows that 
, which means 
.
Tom is 40 inches tall. The sign next to the Superman Roller Coaster says: “You must be 48 inches to ride!”. By what percent does
2 answers:
You might be interested in
The answer is D, i.e. the system was solved via elimination
If you multiply the first equation by 5, the system becomes
If you sum the two equations, you get
And so if you substitute the second equation of system A with this new equation, you'll get system B.