The quantity a varies jointly with c and d and inversely with b When c=3, d= – 12, and b= – 2, a= – 144. What is the value of k, the constant of variation?

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

hi im bob : l

step-by-step explanation:

about 168 miles

step-by-step explanation:

it would be a on edgenuit y

the diagram below is your final answer