Which statement is true about the equations -3x + 4y = 12 and #*-½y = 1?
• The system of the equations has exactly
one solution at (-8, 3).
O The system of the equations has exactly one solution at (-4, 3).
• The system of the equations has no solution; the two lines are parallel.
O The system of the equations has an infinite number of solutions represented by either equation.

the equations has exactly one solution at (-10,-2)

Step-by-step explanation:

Given the simultaneous equation

-3x+4y =12 1

-1/2 y = 1 2

Fromeqn 2;

y = -2

Substitute y = -2 into 1;

-3x+4(-2) = 12

-2x - 8 = 12

-2x = 12 + 8

-2x = 20

x = 20/-2

x = -10

Hence the solution to the system of equation is (-10,-2)

Hence the equations has exactly one solution at (-10,-2)

b.an increase in a causes b to decrease