Question 2(multiple choice worth 1 points) (06.01) solve 2x + 5y = −13 3x − 4y = −8 (4, 1) (−4, 1) (4, −1) (−4, −1)

ANSWER

The solution is


EXPLANATION

The given equations are:



and



We multiply equation 1 by 3 to get,



We multiply equation 2 also by 2 to get,



We subtract equation 4 from equation 3 to get,


This implies that,



We put this value of y into any of the equations say equation 2


Simplify


Group like terms

Simplify,



Divide both sides by 3 to get,



Therefore the solution is


The correct answer is option D.

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8