For this case we have the following system of equations:

We can write a system of equivalent equations.
For this, it is enough to multiply one of the two equations by a scalar.
Multiplying the equation 1 by 2, we have:

Therefore, the new system of equations is:

Answer:
A system that is equivalent is:
D) 
Answer:
is the answer
Step-by-step explanation:
First we need to substitute X and Y with their respective numbers

Then, following PEMDAS, We just need to simplify


real numbers
\sqrt{20} is a real number because it gives a real answer. Its not easy to define that answer (1.4142135623730950488016887242097) but it really exists
Answer:
25n + 600 > 1400
Step-by-step explanation: