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#38998

equations

slopes

lines

coordinate geometry

geometry

algebra

medium

75 sec

Calculator OK

Line $L_{1}$ is defined by the equation $A x + 3 y = 12$ , where $A$ is a constant. Line $L_{2}$ is defined by the equation $y = 2 x - 5$ . If line $L_{1}$ is perpendicular to line $L_{2}$ in the $x y$ -plane, what is the value of $A$ ?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.