Which is true about the line whose equation is y + 3 = 0? the slope is zero. the y-intercept is 3. the slope is 3. the value of x always equals the value of y.

The slope is zero.

Step-by-step explanation:

The y-int is -3, the slope can't be 3, and the value of x isn't equal to y, if it was the lines would be intersecting

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116